Download: USB 2.0 Specification Engineering Change Notice (ECN) #1: Mini-B connector Date: 10/20/2000 Reason for ECN: The USB 2.0 specified device-side connector – the B connector – is too large for use with

USB 2.0 Specification Engineering Change Notice (ECN) #1: Mini-B connector Date: 10/20/2000 Reason for ECN: The USB 2.0 specified device-side connector – the B connector – is too large for use with a new generation of handheld and mobile devices, e.g., cell phones which would benefit from connectivity to the PC. This ECN incorporates a specification of a device-side mini connector (hereafter referred to as a mini-B connector). The new connector only applies to upstream facing ports, i.e., connectors on devices. Summary of ECN: The bulk of the ECN specifies the mechanical requirements for the m...
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USB 2.0 Specification Engineering Change Notice (ECN) #1: Mini-B connector Date: 10/20/2000 Reason for ECN: The USB 2.0 specified device-side connector – the B connector – is too large for use with a new generation of handheld and mobile devices, e.g., cell phones which would benefit from connectivity to the PC. This ECN incorporates a specification of a device-side mini connector (hereafter referred to as a mini-B connector). The new connector only applies to upstream facing ports, i.e., connectors on devices. Summary of ECN: The bulk of the ECN specifies the mechanical requirements for the mini-B plug, receptacle and cable assembly. It also identifies the usage scope of this connector. The last part of the ECN describes the minimum test criteria and performance requirements for the new connector. Benefits of ECN: The ECN enables standardization of miniature device-side USB connectors and consequent economies of scales and lower cost for a new and growing class of devices which will benefit from connectivity to the PC. The standardization also allows leveraging of the compliance test and certification model which is already in place for USB connectors. Assessment of Impact on Current Specification and Current USB Products: The connector specified in the ECN will not have any impact on hardware or software of existing USB products. The current USB spec already allows for vendor-specific device side connectors – such cable assemblies are called captive assemblies. All that the ECN does is to identify one such connector for use in devices which need the smaller size of connector. There is a potential for some end-user confusion because of two standard cable options; but this can be mitigated by appropriate end-user education. Structure of ECN: The ECN is in the form of a new Chapter 6 with the mini-B connector requirements inserted into the appropriate locations. This format enables specification of the new connector in context.,

Chapter 6 Mechanical

This chapter provides the mechanical and electrical specifications for the cables, connectors, and cable assemblies used to interconnect USB devices. The specification includes the dimensions, materials, electrical, and reliability requirements. This chapter documents minimum requirements for the external USB interconnect. Substitute material may be used as long as it meets these minimums. 6.1 Architectural Overview The USB physical topology consists of connecting the downstream hub port to the upstream port of another hub or to a device. The USB can operate at three speeds. High-speed (480 Mb/s) and full-speed (12 Mb/s) require the use of a shielded cable with two power conductors and twisted pair signal conductors. Low- speed (1.5 Mb/s) recommends, but does not require the use of a cable with twisted pair signal conductors. The connectors are designed to be hot plugged. The USB Icon on the plugs provides tactile feedback making it easy to obtain proper orientation. 6.2 Keyed Connector Protocol To minimize end user termination problems, USB uses a “keyed connector” protocol. The physical difference in the Series “A” and “B” (or “mini-B”) connectors insures proper end user connectivity. The “A” connector is the principle means of connecting USB devices directly to a host or to the downstream port of a hub. All USB devices must have the standard Series “A” connector specified in this chapter. The “B” (or “mini-B”) “B” connector allows device vendors to provide a standard detachable cable. This facilitates end user cable replacement. Figure 6-1Figure 6-1 illustrates the keyed connector protocol., Series "A" Connectors Series "B" Connectors ♦ Series "A" plugs are ♦ Series "B" plugs are always oriented upstream always oriented towards the Host System downstream towards the USB Device "A" Plugs (From the "B" Plugs USB Device) (From the Host System) "A" Receptacles (Downstream Output "B" Receptacles from the USB Host or Hub) (Upstream Input to the USB Device or Hub) Series "mini-B" Connectors ♦ Series "mini-B" plugs are always oriented downstream towards the USB Device "mini-B" Plugs (From the Host System) "mini-B" Receptacles (Upstream Input to the USB Device or Hub) Figure 6-1. Keyed Connector Protocol, The following list explains how the plugs and receptacles can be mated: • Series “A” receptacle mates with a Series “A” plug. Electrically, Series “A” receptacles function as outputs from host systems and/or hubs. • Series “A” plug mates with a Series “A” receptacle. The Series “A” plug always is oriented towards the host system. • Series “B” receptacle mates with a Series “B” plug (male). Electrically, Series “B” receptacles function as inputs to hubs or devices. • Series “B” plug mates with a Series “B” receptacle. The Series “B” plug is always oriented towards the USB hub or device. • Series “mini-B” receptacle mates with a Series “mini-B” plug (male). Electrically, Series “mini-B” receptacles function as inputs to hubs or devices. • Series “mini-B” plug mates with a Series “mini-B” receptacle. The Series “mini-B” plug is always oriented towards the USB hub or device. 6.3 Cable USB cable consists of four conductors, two power conductors, and two signal conductors. High-/full-speed cable consists of a signaling twisted pair, VBUS, GND, and an overall shield. High-/full- speed cable must be marked to indicate suitability for USB usage (see Section 6.6.2). High-/full-speed cable may be used with either low-speed, full-speed, or high-speed devices. When high-/full-speed cable is used with low-speed devices, the cable must meet all low-speed requirements. Low-speed recommends, but does not require the use of a cable with twisted signaling conductors. 6.4 Cable Assembly This specification describes three USB cable assemblies: standard detachable cable, high-/full-speed captive cable, and low-speed captive cable. A standard detachable cable is a high-/full-speed cable that is terminated on one end with a Series “A” plug and terminated on the opposite end with a series “B” (or “mini-B”) “B” plug. A high-/full-speed captive cable is terminated on one end with a Series “A” plug and has a vendor-specific connect means (hardwired or custom detachable) on the opposite end for the high-/full-speed peripheral. The low-speed captive cable is terminated on one end with a Series “A” plug and has a vendor-specific connect means (hardwired or custom detachable) on the opposite end for the low-speed peripheral. Any other cable assemblies are prohibited. The color used for the cable assembly is vendor specific; recommended colors are white, grey, or black. 6.4.1 Standard Detachable Cable Assemblies High-speed and full-speed devices can utilize the “B” (or “mini-B”) “B” connector. This allows the device to have a standard detachable USB cable. This eliminates the need to build the device with a hardwired cable and minimizes end user problems if cable replacement is necessary. Devices utilizing the “B” (or “mini-B”) “B” connector must be designed to work with worst case maximum length detachable cable. Standard detachable cable assemblies may be used only on high-speed and full-speed devices. Using a high-/full-speed standard detachable cable on a low-speed device may exceed the maximum low-speed cable length. Figure 6-2Figure 6-2 and Figure 6-3 illustrates a standard detachable cable assembliesy., 87654321

IMPORTANT NOTICE: All standard detachable cable assemblies must be

high-/full-speed. HHABGGABOvermolded Series "A" Plug Overmolded Series "B" Plug (Always upstream towards the "host" system.) (Always downstream towards the USB Device.) CCFFCCDetail C - C (Typical USB Shielded Cable) Detail A - A Detail B - BEE(Series "A" Plug) (Series "B" Plug) Polyvinyl Chloride (PVC) Jacket > 65% Tinned Copper Braided Shield 11.5 15.7 10.5 Aluminum Metallized Polyester Inner Shield 7.5 28 AWG STC Drain Wire21123434DDRed (VBUS) Green (D +) 12.0 12.0 Black (Ground) White (D -) C 27.0 C 32.0 All dimensions are in millimeters (mm) unless otherwise noted. Dimensions are TYPICAL and are for general reference purposes only. 9.0BB9.0 Optional Molded Strain Relief Series "A" Plug to Series "B" Plug

USB Standard Detachable

A Cable Assembly A SIZE DATE DRAWING NUMBER REV A 2/98 N/A C SCALE: N/A SHEET 1 of187654321

Figure 6-2 2. USB Standard Detachable Cable Assembly

, Figure 6- 3. USB Standard Mini-connector Detachable Cable Assembly, Standard detachable cable assemblies must meet the following electrical requirements: • The cable must be terminated on one end with an overmolded Series “A” plug and the opposite end is terminated with an overmolded Series “B” (or “mini-B”) “B” plug. • The cable must be rated for high-speed and full-speed. • The cable impedance must match the impedance of the high-speed and full-speed drivers. The drivers are characterized to drive specific cable impedance. Refer to Section 7.1.1 for details. • The maximum allowable cable length is determined by signal pair attenuation and propagation delay. Refer to Sections 7.1.14 and 7.1.17 for details. • Differences in propagation delay between the two signal conductors must be minimized. Refer to Section 7.1.3 for details. • The GND lead provides a common ground reference between the upstream and downstream ports. The maximum cable length is limited by the voltage drop across the GND lead. Refer to Section 7.2.2 for details. The minimum acceptable wire gauge is calculated assuming the attached device is high power. • The VBUS lead provides power to the connected device. For standard detachable cables, the VBUS requirement is the same as the GND lead. 6.4.2 High-/full-speed Captive Cable Assemblies Assemblies are considered captive if they are provided with a vendor-specific connect means (hardwired or custom detachable) to the peripheral. High-/full-speed hardwired cable assemblies may be used with either high-speed, full-speed, or low-speed devices. When using a high-/full-speed hardwired cable on a low- speed device, the cable must meet all low-speed requirements. Figure 6-3 Figure 6-4 illustrates a high-/full-speed hardwired cable assembly., 87654321HABH

A B

G G Overmolded Series "A" Plug (Always upstream towards the "host" system.)

Detail A - A

(Series "A" Plug) F F 15.7 7.5 Cut End (Always downstream towards the USB Device.) 1234EDetail B - B (Typical Terminations) E 12.0

Blunt Cut Termination Prepared Termination

Polyvinyl Chloride (PVC) Jacket Polyvinyl Chloride (PVC) Jacket > 65% Tinned Copper Braided 27.0 Blunt Cut Termination Shield (Length Dimension Point) Metallized Mylar Inner Shield D 28 AWG STC Drain Wire D Red (VBUS) Black (Ground) Green (D +) White (D -) 9.0 User Specified Length Dimension Point C Optional Molded C Strain Relief B All dimensions are in millimeters (mm) B unless otherwise note.

Dimensions are TYPICAL and are for

general reference purposes only. Series "A" Plug to Cut End

USB High-/full-speed

A Hardwired Cable Assembly A SIZE DATE DRAWING NUMBER REV A 2/98 N/A C SCALE: N/A SHEET 1 of187654321

Figure 6-3 6-4 . USB High-/full-speed Hardwired Cable Assembly

, High-/full-speed captive cable assemblies must meet the following electrical requirements: • The cable must be terminated on one end with an overmolded Series “A” plug and the opposite end is vendor specific. If the vendor specific interconnect is to be hot plugged, it must meet the same performance requirements as the USB “B” connector. • The cable must be rated for high-speed and full-speed. • The cable impedance must match the impedance of the high-speed and full-speed drivers. The drivers are characterized to drive specific cable impedance. Refer to Section 7.1.1 for details. • The maximum allowable cable length is determined by signal pair attenuation and propagation delay. Refer to Sections 7.1.14 and 7.1.17 for details. • Differences in propagation delay between the two signal conductors must be minimized. Refer to Section 7.1.3 for details. • The GND lead provides a common reference between the upstream and downstream ports. The maximum cable length is determined by the voltage drop across the GND lead. Refer to Section 7.2.2 for details. The minimum wire gauge is calculated using the worst case current consumption. • The VBUS lead provides power to the connected device. The minimum wire gauge is vendor specific. 6.4.3 Low-speed Captive Cable Assemblies Assemblies are considered captive if they are provided with a vendor-specific connect means (hardwired or custom detachable) to the peripheral. Low-speed cables may only be used on low-speed devices. Figure 6-4Figure 6-5 illustrates a low-speed hardwired cable assembly., 87654321

IMPORTANT NOTICE: For use in low-speed applications only.

HHABGABGOvermolded Series "A" Plug (Always upstream towards the "host" system.) F F Detail A - A (Series "A" Plug) 15.7 Cut End 7.5 (Always downstream towards the USB Device.) E1234EDetail B - B (Typical Terminations) 12.0 Blunt Cut Termination Prepared Termination Polyvinyl Chloride (PVC) Jacket Polyvinyl Chloride (PVC) Jacket Blunt Cut Termination Red (VBUS) D (Length Dimension Point) Black (Ground) D 27.0 Green (D +) White (D -) User Specified C Length Dimension Point C 9.0 Optional Molded Strain ReliefBBAll dimensions are in millimeters (mm) unless otherwise noted. Dimensions are TYPICAL and are for Series "A" Plug to Cut End general reference purposes only. USB Low-speed A Hardwired Cable Assembly A SIZE DATE DRAWING NUMBER REV A 2/98 N/A C SCALE: N/A SHEET 1 of187654321

Figure 6-46 -5 . USB Low-speed Hardwired Cable Assembly

, Low-speed captive cable assemblies must meet the following electrical requirements: • The cable must be terminated on one end with an overmolded Series “A” plug and the opposite end is vendor specific. If the vendor specific interconnect is to be hot plugged, it must meet the same performance requirements as the USB “B” connector. • Low-speed drivers are characterized for operation over a range of capacitive loads. This value includes all sources of capacitance on the D+ and D-lines, not just the cable. Cable selection must insure that total load capacitance falls between specified minimum and maximum values. If the desired implementation does not meet the minimum requirement, additional capacitance needs to be added to the device. Refer to Section 7.1.1.2 for details. • The maximum low-speed cable length is determined by the rise and fall times of low-speed signaling. This forces low-speed cable to be significantly shorter than high-/full-speed. Refer to Section 7.1.1.2 for details. • Differences in propagation delay between the two signal conductors must be minimized. Refer to Section 7.1.3 for details. • The GND lead provides a common reference between the upstream and downstream ports. The maximum cable length is determined by the voltage drop across the GND lead. Refer to Section 7.2.2 for details. The minimum wire gauge is calculated using the worst case current consumption. • The VBUS lead provides power to the connected device. The minimum wire gauge is vendor specific. 6.4.4 Prohibited Cable Assemblies USB is optimized for ease of use. The expectation is that if the device can be plugged in, it will work. By specification, the only conditions that prevent a USB device from being successfully utilized are lack of power, lack of bandwidth, and excessive topology depth. These conditions are well understood by the system software. Prohibited cable assemblies may work in some situations, but they cannot be guaranteed to work in all instances. • Extension cable assembly A cable assembly that provides a Series “A” plug with a series “A” receptacle or a Series “B” plug with a Series “B” receptacle or a Series “mini-B” plug with a Series “mini-B” receptacle. This allows multiple cable segments to be connected together, possibly exceeding the maximum permissible cable length. • Cable assembly that violates USB topology rules A cable assembly with both ends terminated in either Series “A” plugs or Series “B” (or “mini- B”) “B” receptacles. This allows two downstream ports to be directly connected. Note: This prohibition does not prevent using a USB device to provide a bridge between two USB buses. • Standard detachable cables for low-speed devices Low-speed devices are prohibited from using standard detachable cables. A standard detachable cable assembly must be high-/full-speed. Since a standard detachable cable assembly is high-/full- speed rated, using a long high-/full-speed cable exceeds the capacitive load of low-speed., 6.5 Connector Mechanical Configuration and Material Requirements The USB Icon is used to identify USB plugs and the receptacles. Figure 6-5Figure 6-6 illustrates the USB Icon. All dimensions are ± 5%

L

Dia:1.33 L 0.33 L Dia:1.67 L Dia:L L 1.50 L Dia:L 0.33 L

L

0.5 L 1.50 L Dia:L L Dia:L

L

Dia:1.33 L 1.67 L 0.33LL2.33 L 3.75 L 5.00 L 5.17 L 6.25 L 8.00 L Figure 6-5 Figure 6- 6 . USB Icon 6.5.1 USB Icon Location The USB Icon is embossed, in a recessed area, on the topside of the USB plug. This provides easy user recognition and facilitates alignment during the mating process. The USB Icon and Manufacturer’s logo should not project beyond the overmold surface. The USB Icon is required, while the Manufacturer’s logo is recommended, for both Series “A” and “B” (or “mini-B”) “B” plug assemblies. The USB Icon is also located adjacent to each receptacle. Receptacles should be oriented to allow the Icon on the plug to be visible during the mating process. Figure 6-6Figure 6-7 and Figure 6-8 illustrates the typical plug orientations.,

Top View

Optional Top A "Locator Detail"

A Locator

Height Approximately 0.6mm (0.024") Manufacturer’s 1 Engraved USB Engraved Logo 2 Icon Locator Width 3 Approximately Overmolding 0.5mm (0.020") 0.6mm (0.024") 0.6mm (0.024") Max Max Manufacturer’s USB Icon Logo Optional Top Engraving Recess Engraving Recess "Locator Detail"

Section A - A

(Plug Cross-Section)

Figure 6-6 Figure 6- 7 . Typical USB Plug Orientation

, Figure 6- 8. Typical USB “Mini-B” Connector Plug Orientation, 6.5.2 USB Connector Termination Data Table 6-1Table 6-1 provides the standardized contact terminating assignments by number and electrical value for Series “A” and Series “B” connectors. Table 6-1. USB Series “A” and Series “B” Connector Termination Assignment Contact Typical Wiring Number Signal Name Assignment 1 VBUS Red 2 D- White 3 D+ Green 4 GND Black Shell Shield Drain Wire Table 6-2 provides the standardized contact terminating assignments by number and electrical value for Series “mini-B” connectors. Table 6-2. USB Series “mini-B” Connector Termination Assignment Contact Signal Name T ypical Wiring N umber Assignment1VBUS Red 2 D- White3D+ Green4IDnot connected5GND B lack ShellShield Drain Wire 6.5.3 Series “A” and Series “ B” (or “Mini-B”) “B” Receptacles Electrical and mechanical interface configuration data for Series "A" and Series "B" receptacles are shown in Figure 6-7Figure 6-9 through Figure 6-12 and Figure 6-8. Also, refer to Figure 6-12Figure 6-17 through Figure 6-20, Figure 6-13, and Figure 6-14 at the end of this chapter for typical PCB receptacle layouts., 87654321

USB Series "A" Receptacle Interface

12.50 ± 0.10HHC11.10 ± 0.10

A

8.88 ± 0.20 R 0.64 ± 0.13 (Typical) B Center Line 1.84 ± 0.05 8.38 ± 0.08 R 0.32 ± 0.13 (Typical) 0.50 ± 0.10BGG300 ± 20 (2) 12345.12 ± 0.10 0.38 ± 0.13FFCenter Line of 5.12 0.64 ± 0.13 (8) 4.98 ± 0.25 Receptacle Contact 1.00 ± 0.05 (2) Contact Point 3.50 ± 0.05 (2) Printed Circuit Board 1.00 ± 0.05 (4) C Center Line 4.13 REFEEAll dimensions are in millimeters (mm) unless otherwise noted.

USB Series "A" Receptacle and Plug

D Mating Features D Fully Mated Series "A" 0.50 ± 0.10 (2) Receptacle and Plug 300 ± 20 (2) C C 8.0 MAXBBReceptacle Flange 1 2.67 MIN Interface and Mating Drawing 1 Allow a minimum spacing of 2.67mm between the face of the receptacle and the plug Series "A" ReceptacleA A overmold boot. SIZE DATE DRAWING NUMBER REV A 2/98 N/A C SCALE: N/A SHEET 1 of187654321

Figure 6-7 Figure 6- 9 . USB Series "A" Receptacle Interface and Mating Drawing

Overmold Boot, 87654321

USB Series "B" Receptacle Interface

H A 8.45 + 0.10 H 8.88 + 0.20 8.38 + 0.08 C 5.60 + 0.10 1.63 + 0.05 (2) Receptacle Contact 450 + 0.50 (2)

B

300 + 20 (4) G217.78 + 0.10GBCenter Line 3.18 + 0.05343.67 + 0.08 0.80 + 0.08 0.38 + 0.13 (4) F R 0.38 (6) F3.67 Center Line 4.98 + 0.25 Contact Point 1.00 + 0.05 (4) 1.25 + 0.10 (4) C Center Line Receptacle Housing E 300 + 20 (2) E B Center Line All dimensions are in millimeters (mm) unless otherwise noted. 0.50 + 0.10 (2) D D Receptacle Shell

USB Series "B" Receptacle and Plug Mating Features

C C 10.5 MAX 11.5 MAXBB2.67 MIN 1 Interface and Mating Drawing Receptacle Shell Fully Mated Plug and Receptacle USB Series "B" ReceptacleAAAllow a minimum spacing of 2.67mm between the SIZE DATE DRAWING NUMBER REV 1 face of the receptacle and the plug overmold boot. A 2/98 N/A C SCALE: N/A SHEET 1 of187654321

Figure 6-8 Figure 6- 10 . USB Series "B" Receptacle Interface and Mating Drawing

Overmold Boot Overmold Boot, Figure 6 -11. USB Series “Mini-B” Receptacle Interface and Mating Drawing, Figure 6 -12. USB Series “Mini-B” Receptacle Interface Drawing (Detail), 6.5.3.1 Receptacle Injection Molded Thermoplastic Insulator Material Minimum UL 94-V0 rated, thirty percent (30%) glass-filled polybutylene terephthalate (PBT) or polyethylene terephthalate (PET) or better. Typical Colors: Black, gray, and natural. The “mini-B” receptacle insulator must be black in color. Flammability Characteristics: UL 94-V0 rated. Flame Retardant Package must meet or exceed the requirements for UL, CSA, VDE, etc. Oxygen Index (LOI): Greater than 21%. ASTM D 2863. 6.5.3.2 Receptacle Shell Materials 6.5.3.2.1 Series “A” and Series “B” Substrate Material: 0.30 + 0.05 mm phosphor bronze, nickel silver, or other copper based high strength materials. Plating: 1. Underplate: Optional. Minimum 1.00 micrometers (40 microinches) nickel. In addition, manufacturer may use a copper underplate beneath the nickel. 2. Outside: Minimum 2.5 micrometers (100 microinches) bright tin or bright tin-lead. 6.5.3.2.2 Series “mini-B” Substrate Material: 0.3 mm minimum phosphor bronze, nickel silver, or other suitable material. The plating information below describes an example of acceptable "mini-B" receptacle plating. Plating: 1. Underplate: Optional. Minimum 1.00 micrometers (40 microinches) nickel. In addition, manufacturer may use a copper underplate beneath the nickel. 2. Outside: Minimum 2.5 micrometers (100 microinches) bright tin or bright tin-lead. 6.5.3.3 Receptacle Contact Materials 6.5.3.3.1 Series “A” and Series “B” Substrate Material: 0.30 + 0.05 mm minimum half-hard phosphor bronze or other high strength copper based material. Plating: Contacts are to be selectively plated. A. Option I 1. Underplate: Minimum 1.25 micrometers (50 microinches) nickel. Copper over base material is optional. 2. Mating Area: Minimum 0.05 micrometers (2 microinches) gold over a minimum of 0.70 micrometers (28 microinches) palladium. 3. Solder Tails: Minimum 3.8 micrometers (150 microinches) bright tin-lead over the underplate. B. Option II 1. Underplate: Minimum 1.25 micrometers (50 microinches) nickel. Copper over base material is optional., 2. Mating Area: Minimum 0.05 micrometers (2 microinches) gold over a minimum of 0.75 micrometers (30 microinches) palladium-nickel. 3. Solder Tails: Minimum 3.8 micrometers (150 microinches) bright tin-lead over the underplate. C. Option III 1. Underplate: Minimum 1.25 micrometers (50 microinches) nickel. Copper over base material is optional. 2. Mating Area: Minimum 0.75 micrometers (30 microinches) gold. 3. Solder Tails: Minimum 3.8 micrometers (150 microinches) bright tin-lead over the underplate. 6.5.3.3.2 Series “mini-B” Substrate Material: 0.2 mm minimum half-hard phosphor bronze or other high strength suitable material. Plating: Contacts are to be selectively plated. The following underplate, mating area, and solder tails options below describe examples of acceptable "mini-B" receptacle contact plating. D. Option I 1. Underplate: Minimum 1.25 micrometers (50 microinches) nickel. Copper over base material is optional. 2. Mating Area: Minimum 0.05 micrometers (2 microinches) gold over a minimum of 0.70 micrometers (28 microinches) palladium. 3. Solder Tails: Minimum 3.8 micrometers (150 microinches) bright tin-lead over the underplate. E. Option II 1. Underplate: Minimum 1.25 micrometers (50 microinches) nickel. Copper over base material is optional. 2. Mating Area: Minimum 0.05 micrometers (2 microinches) gold over a minimum of 0.75 micrometers (30 microinches) palladium-nickel. 3. Solder Tails: Minimum 3.8 micrometers (150 microinches) bright tin-lead over the underplate. F. Option III 1. Underplate: Minimum 1.25 micrometers (50 microinches) nickel. Copper over base material is optional. 2. Mating Area: Minimum 0.75 micrometers (30 microinches) gold. 3. Solder Tails: Minimum 3.8 micrometers (150 microinches) bright tin-lead over the underplate. 6.5.4 Series “A” and Series “ B” (or “Mini-B”) “B” Plugs Electrical and mechanical interface configuration data for Series "A" and Series “B” (or “mini-B”) "B" plugs are shown in Figure 6-9Figure 6-13 through Figure 6-15 and Figure 6-10., 87654321B12.00 ± 0.10 R 0.64 + 0.13 Typical 11.75 MIN H 8.0 MAX 0.315 ± 0.03 Typical 0.15 ± 0.10 Typical 300 ± 20 Typical H 4.50 ± 0.10 300 ± 204321

G

1.95 ± 0.05 0.38 ± 0.13

G

8.0 MAX Plug Contact UL 94-V0 Plug HousingAA16.0 MAX1A11.75 MIN 5.16 ± 0.10 2.00 ± 0.13 (4)4.0 MAX B Center Line F 1.00 ± 0.05 (4) F 2.50 ± 0.05 (2) B Center Line 2.00 ± 0.05 (2)

B

E Section A - A E 2.50 ± 0.13 (4) Overmold Boot B Overall connector and cable assembly D length is measured from Datum ’A’ of D the Series "A" Plug to Datum ’A’ of the 8.65 ± 0.19 Series "B" Plug or to the blunt end 7.41 ± 0.31 termination. 4.2 MIN 6.41 ± 0.31 GOLD PLATE AREA All dimensions are in millimeters (mm) unless otherwise noted. C C 1.0 ± 0.05 (2) 3.5 ± 0.05 (2) 9.70 ± 0.13

Section B - B

B B Interface Drawing 0.16 ± 0.15 USB Series "A" PlugA A SIZE DATE DRAWING NUMBER REV 0.13 ± 0.13 A 2/98 N/A C SCALE: N/A SHEET 1 of187654321

Figure 6-9 Figure 6- 13 . USB Series "A" Plug Interface Drawing

Overmold Boot, 876543218.00 ± 0.10HHC5.83 ± 0.10 0.38 MAX 10.5 MAX 1.46 ± 0.10 B 300 ± 20 Typical G 450 ± 0.50 (2) G123.29 ± 0.05 7.26 ± 0.10430.80 ± 0.05 Center Line of 2.85 300 ± 20 (2) FFAA2.85 ± 0.13 (2) C Center Line B Center Line 11.75 MIN 11.5 MAX1A3.70 ± 0.13

B

E Section A - A E 0.25 ± 0.05 D 6.41 ± 0.31 D 4.20 MIN Gold Plate Area B 8.65 ± 0.19 Overall connector and cable assembly length 1 is measured from Datum 'A' of the Series "B" 1.16 MAX Plug to Datum 'A' of the Series "A" Plug or C 7.41 ± 0.31 the blunt end termination. C 1.25 ± 0.10 (4) 4.67 ± 0.10 C Center Line All dimensions are in millimeters (mm) unless otherwise noted. Section B - BBB0.16 ± 0.15 0.13 ± 0.13 Typical Typical Interface Drawing

USB Series "B" Plug

A A SIZE DATE DRAWING NUMBER REV A 2/98 N/A C SCALE: N/A SHEET 1 of187654321

Figure 6-10 Figure 6 -14 . USB Series “B” Plug Interface Drawing

Overmold Boot Overmold Boot, Figure 6 -15. USB Series “Mini-B” Plug Interface Drawing, 6.5.4.1 Plug Injection Molded Thermoplastic Insulator Material Minimum UL 94-V0 rated, thirty percent (30%) glass-filled polybutylene terephthalate (PBT) or polyethylene terephthalate (PET) or better. Typical Colors: Black, gray, and natural. The “mini-B” plug insulator must be black in color. Flammability Characteristics: UL 94-V0 rated. Flame Retardant Package must meet or exceed the requirements for UL, CSA, and VDE. Oxygen Index (LOI): 21%. ASTM D 2863. 6.5.4.2 Plug Shell Materials 6.5.4.2.1 Series “A” and Series “B” Substrate Material: 0.30 + 0.05 mm phosphor bronze, nickel silver, or other suitable material. Plating: A. Underplate: Optional. Minimum 1.00 micrometers (40 microinches) nickel. In addition, manufacturer may use a copper underplate beneath the nickel. B. Outside: Minimum 2.5 micrometers (100 microinches) bright tin or bright tin-lead. 6.5.4.2.2 Series “mini-B” Substrate Material: 0.2 mm minimum phosphor bronze, nickel silver, or other suitable material. The information below describes an example of acceptable "mini-B" plug plating. Plating: 1. Underplate: Optional. Minimum 1.00 micrometers (40 microinches) nickel. In addition, manufacturer may use a copper underplate beneath the nickel. 2. Outside: Minimum 2.5 micrometers (100 microinches) bright tin or bright tin-lead. 6.5.4.3 Plug (Male) Contact Materials 6.5.4.3.1 Series “A” and Series “B” Substrate Material: 0.30 + 0.05 mm half-hard phosphor bronze. Plating: Contacts are to be selectively plated. A. Option I 1. Underplate: Minimum 1.25 micrometers (50 microinches) nickel. Copper over base material is optional. 2. Mating Area: Minimum 0.05 micrometers (2 microinches) gold over a minimum of 0.70 micrometers (28 microinches) palladium. 3. Solder Tails: Minimum 3.8 micrometers (150 microinches) bright tin-lead over the underplate. B. Option II, 1. Underplate: Minimum 1.25 micrometers (50 microinches) nickel. Copper over base material is optional. 2. Mating Area: Minimum 0.05 micrometers (2 microinches) gold over a minimum of 0.75 micrometers (30 microinches) palladium-nickel. 3. Wire Crimp/Solder Tails: Minimum 3.8 micrometers (150 microinches) bright tin-lead over the underplate. C. Option III 1. Underplate: Minimum 1.25 micrometers (50 microinches) nickel. Copper over base material is optional. 2. Mating Area: Minimum 0.75 micrometers (30 microinches) gold. 3. Solder Tails: Minimum 3.8 micrometers (150 microinches) bright tin-lead over the underplate. 6.5.4.3.2 Series “mini-B” Substrate Material: 0.2 mm minimum half-hard phosphor bronze or other suitable material. Plating: Contacts are to be selectively plated. The underplate, mating area, and solder tails options below describe examples of acceptable "mini-B" plug contact plating. D. Option I 1. Underplate: Minimum 1.25 micrometers (50 microinches) nickel. Copper over base material is optional. 2. Mating Area: Minimum 0.05 micrometers (2 microinches) gold over a minimum of 0.70 micrometers (28 microinches) palladium. 3. Solder Tails: Minimum 3.8 micrometers (150 microinches) bright tin-lead over the underplate. E. Option II 1. Underplate: Minimum 1.25 micrometers (50 microinches) nickel. Copper over base material is optional. 2. Mating Area: Minimum 0.05 micrometers (2 microinches) gold over a minimum of 0.75 micrometers (30 microinches) palladium-nickel. 3. Wire Crimp/Solder Tails: Minimum 3.8 micrometers (150 microinches) bright tin-lead over the underplate. F. Option III 1. Underplate: Minimum 1.25 micrometers (50 microinches) nickel. Copper over base material is optional. 2. Mating Area: Minimum 0.75 micrometers (30 microinches) gold. 3. Solder Tails: Minimum 3.8 micrometers (150 microinches) bright tin-lead over the underplate., 6.6 Cable Mechanical Configuration and Material Requirements High-/full-speed and low-speed cables differ in data conductor arrangement and shielding. Low-speed recommends, but does not require, use of a cable with twisted data conductors. Low speed recommends, but does not require, use of a cable with a braided outer shield. Figure 6-11Figure 6-16 shows the typical high-/full-speed cable construction. on-Twisted Power Pair: Polyvinyl Chloride (PVC) Jacket Red: VBUS Black: Power Ground Outer Shield > 65% Interwoven Tinned Copper Braid

W

Inner Shield AluminumRBMetallized Polyester

G

28 AWG Tinned Twisted Signaling Pair: Copper Drain Wire White: D- Green: D+ Figure 6-11 Figure 6- 16 . Typical High-/full-speed Cable Construction 6.6.1 Description High-/full-speed cable consists of one 28 to 20 AWG non-twisted power pair and one 28 AWG twisted data pair with an aluminum metallized polyester inner shield, 28 AWG stranded tinned copper drain wire, > 65% tinned copper wire interwoven (braided) outer shield, and PVC outer jacket. Low-speed cable consists of one 28 to 20 AWG non-twisted power pair and one 28 AWG data pair (a twist is recommended) with an aluminum metallized polyester inner shield, 28 AWG stranded tinned copper drain wire and PVC outer jacket. A > 65% tinned copper wire interwoven (braided) outer shield is recommended., 6.6.2 Construction Raw materials used in the fabrication of this cable must be of such quality that the fabricated cable is capable of meeting or exceeding the mechanical and electrical performance criteria of the most current USB Specification revision and all applicable domestic and international safety/testing agency requirements; e.g., UL, CSA, BSA, NEC, etc., for electronic signaling and power distribution cables in its category. Table 6-3 2. Power Pair American Wire Nominal Conductor Stranded Tinned Gauge (AWG) Outer Diameter Conductors 0.381 mm (0.015”) 7 x 36 0.406 mm (0.016”) 19 x 40 0.483 mm (0.019”) 7 x 34 0.508 mm (0.020”) 19 x 38 0.610 mm (0.024”) 7 x 32 0.610 mm (0.024”) 19 x 36 0.762 mm (0.030”) 7 x 30 0.787 mm (0.031”) 19 x 34 0.890 mm (0.035”) 7 x 28 0.931 mm (0.037”) 19 x 32 Note: Minimum conductor construction must be stranded tinned copper. Non-Twisted Power Pair: A. Wire Gauge: Minimum 28 AWG or as specified by the user contingent upon the specified cable length. Refer to Table 6-3Table 6-2. B. Wire Insulation: Semirigid polyvinyl chloride (PVC). 1. Nominal Insulation Wall Thickness: 0.25 mm (0.010”) 2. Typical Power (VBUS) Conductor: Red Insulation 3. Typical Ground Conductor: Black Insulation Signal Pair: A. Wire Gauge: 28 AWG minimum. Refer to Table 6-4Table 6-3., Table 6-4 3. Signal Pair American Wire Nominal Conductor Stranded Tinned Gauge (AWG) Outer Diameter Conductors 0.381 mm (0.015”) 7 x 36 0.406 mm (0.016”) 19 x 40 Note: Minimum conductor construction must be stranded tinned copper. B. Wire Insulation: High-density polyethylene (HDPE), alternately foamed polyethylene or foamed polypropylene 1. Nominal Insulation Wall Thickness: 0.31 mm (0.012”) 2. Typical Data Plus (+) Conductor: Green Insulation 3. Typical Data Minus (-) Conductor: White Insulation C. Nominal Twist Ratio (not required for low-speed): One full twist every 60 mm (2.36”) to 80 mm (3.15”) Aluminum Metallized Polyester Inner Shield (required for low-speed): A. Substrate Material: Polyethylene terephthalate (PET) or equivalent material B. Metallizing: Vacuum deposited aluminum C. Assembly: 1. The aluminum metallized side of the inner shield must be positioned facing out to ensure direct contact with the drain wire. 2. The aluminum metallized inner shield must overlap by approximately one-quarter turn. Drain Wire (required for low-speed): A. Wire Gauge: Minimum 28 AWG stranded tinned copper (STC) non-insulated. Refer to Table 6-5Table 6-4. Table 6- 5 4. Drain Wire Signal Pair American Wire Nominal Conductor Stranded Tinned Gauge (AWG) Outer Diameter Conductors 0.381 mm (0.015”) 7 x 36 0.406 mm (0.016”) 19 x 40 Interwoven (Braided) Tinned Copper Wire (ITCW) Outer Shield (recommended but not required for low- speed): A. Coverage Area: Minimum 65%. B. Assembly: The interwoven (braided) tinned copper wire outer shield must encase the aluminum metallized PET shielded power and signal pairs and must be in direct contact with the drain wire. Outer Polyvinyl Chloride (PVC) Jacket: A. Assembly: The outer PVC jacket must encase the fully shielded power and signal pairs and must be in direct contact with the tinned copper outer shield., B. Nominal Wall Thickness: 0.64 mm (0.025”). Marking: The cable must be legibly marked using contrasting color permanent ink. A. Minimum marking information for high-/full-speed cable must include: USB SHIELDED UL CM 75 oC — UL Vendor ID. B. Minimum marking information for low-speed cable shall include: USB specific marking is not required for low-speed cable. Nominal Fabricated Cable Outer Diameter: This is a nominal value and may vary slightly from manufacturer to manufacturer as a function of the conductor insulating materials and conductor specified. Refer to Table 6-6Table 6-5. Table 6-6 5. Nominal Cable Diameter Shielded USB Nominal Outer Cable Configuration Cable Diameter 28/28 4.06 mm (0.160”) 28/26 4.32 mm (0.170”) 28/24 4.57 mm (0.180”) 28/22 4.83 mm (0.190”) 28/20 5.21 mm (0.205”) 6.6.3 Electrical Characteristics All electrical characteristics must be measured at or referenced to +20 oC (68 oF). Voltage Rating: 30 V rms maximum. Conductor Resistance: Conductor resistance must be measured in accordance with ASTM-D-4566 Section 13. Refer to Table 6-7Table 6-6. Conductor Resistance Unbalance (Pairs): Conductor resistance unbalance between two (2) conductors of any pair must not exceed five percent (5%) when measured in accordance with ASTM-D-4566 Section 15. The DC resistance from plug shell to plug shell (or end of integrated cable) must be less than 0.6 ohms. Table 6-7 6. Conductor Resistance American Ohms (Ω) / 100 Meters Wire Gauge (AWG) Maximum 28 23.20 26 14.60 24 9.09 22 5.74 20 3.58, 6.6.4 Cable Environmental Characteristics Temperature Range: A. Operating Temperature Range: 0 oC to +50 oC B. Storage Temperature Range: -20 oC to +60 oC C. Nominal Temperature Rating: +20 oC Flammability: All plastic materials used in the fabrication of this product shall meet or exceed the requirements of NEC Article 800 for communications cables Type CM (Commercial). 6.6.5 Listing The product shall be UL listed per UL Subject 444, Class 2, Type CM for Communications Cable Requirements. 6.7 Electrical, Mechanical, and Environmental Compliance Standards Table 6-8Table 6-7 lists the minimum test criteria for all USB cable, cable assemblies, and connectors. Table 6-8 7. USB Electrical, Mechanical, and Environmental Compliance Standards Test Description Test Procedure Performance Requirement EIA 364-18 Must meet or exceed the requirements specified by the Visual and Dimensional Inspection Visual, dimensional, and functional most current version of Chapter 6 inspection in accordance with the of the USB Specification. USB quality inspection plans. EIA 364-21 1,000 (100 for “mini-B” c onnector) MΩ minimum. The object of this test procedure is to detail a standard method to assess the insulation resistance of USB connectors. This test Insulation Resistance procedure is used to determine the resistance offered by the insulation materials and the various seals of a connector to a DC potential tending to produce a leakage of current through or on the surface of these members. EIA 364-20 The dielectric must withstand 500 (100 for “mini-B” connector) V The object of this test procedure is AC for one minute at sea level. to detail a test method to prove that Dielectric a USB connector can operate Withstanding Voltage safely at its rated voltage and withstand momentary over-potentials due to switching, surges, and/or other similar phenomena., Table 6-8 Table 6-7. USB Electrical, Mechanical, and Environmental Compliance Standards (Continued) Test Description Test Procedure Performance Requirement EIA 364-23 30 ( 50 for “mini-B” connector )mΩ maximum when measured at 20 The object of this test is to detail a mV maximum open circuit at 100 standard method to measure the mA. Mated test contacts must beLow Level Contact Resistance electrical resistance across a pair in a connector housing. of mated contacts such that the insulating films, if present, will not be broken or asperity melting will not occur. EIA 364-70 — Method B 1.5 (1 for “mini-B” connector) A at 250 V AC minimum when The object of this test procedure is measured at an ambient Contact Current to detail a standard method to temperature of 25 °C. With power Rating assess the current carrying applied to the contacts, the ∆ T capacity of mated USB connector must not exceed +30 °C at any contacts. point in the USB connector under test. EIA 364-30 2 pF maximum unmated per contact. Contact Capacitance The object of this test is to detail a standard method to determine the capacitance between conductive elements of a USB connector. EIA 364-13 35 Newtons maximum at a maximum rate of 12.5 mm Insertion Force The object of this test is to detail a (0.492”) per minute. standard method for determining the mechanical forces required for inserting a USB connector. EIA 364-13 10 Newtons minimum at a maximum rate of 12.5 mm The object of this test is to detail a (0.492”) per minute. standard method for determining the mechanical forces required for For “mini-B” connector with Deten t extracting a USB connector. L atch at a maximum rateof12.5 mm (0.492”) per minute Extraction Force7Nmin. initial3Nmin. after 5000 cycles, T able 6-8 Table 6-7. USB Electrical, Mechanical, and Environmental Compliance Standards (Continued) Test Description Test Procedure Performance Requirement EIA 364-09 1,500 (5 , 000 for “mini-B” c onnector) insertion/extraction The object of this test procedure is cycles at a maximum rate of 200 to detail a uniform test method for cycles per hour. determining the effects caused by subjecting a USB connector to the Durability conditioning action of insertion and extraction, simulating the expected life of the connectors. Durability cycling with a gauge is intended only to produce mechanical stress. Durability performed with mating components is intended to produce both mechanical and wear stress. EIA 364-38 After the application of a steady state axial load of 40 Newtons for Test Condition A one minute. The object of this test procedure is to detail a standard method for Cable Pull-Out determining the holding effect of a USB plug cable clamp without causing any detrimental effects upon the cable or connector components when the cable is subjected to inadvertent axial tensile loads. EIA 364-27 No discontinuities of 1 µs or longer duration when mated USB Test Condition H connectors are subjected to 11 ms duration 30 Gs half-sine shock The object of this test procedure is pulses. Three shocks in each Physical Shock to detail a standard method to direction applied along three assess the ability of a USB mutually perpendicular planes for connector to withstand specified a total of 18 shocks. severity of mechanical shock., Table 6-8 Table 6-7. USB Electrical, Mechanical, and Environmental Compliance Standards (Continued) Test Description Test Procedure Performance Requirement EIA 364-28 No discontinuities of 1 µs or longer duration when mated USB Test Condition V Test Letter A connectors are subjected to 5.35 Gs RMS. 15 minutes in each This test procedure is applicable to of three mutually perpendicular USB connectors that may, in planes. service, be subjected to conditions involving vibration. Whether a USB Random Vibration connector has to function during vibration or merely to survive conditions of vibration should be clearly stated by the detailed product specification. In either case, the relevant specification should always prescribe the acceptable performance tolerances. EIA 364-32 10 cycles –55 °C and +85 °C. The USB connectors under test must Test Condition I be mated. The object of this test is to Thermal Shock determine the resistance of a USB connector to exposure at extremes of high and low temperatures and to the shock of alternate exposures to these extremes, simulating the worst case conditions for storage, transportation, and application. EIA 364-31 168 hours minimum (seven complete cycles). The USB Test Condition A Method III connectors under test must be tested in accordance with EIA 364-31. Humidity Life The object of this test procedure is to detail a standard test method for the evaluation of the properties of materials used in USB connectors as they are influenced by the effects of high humidity and heat. EIA 364-52 USB contact solder tails must pass 95% coverage after one The object of this test procedure is hour steam aging as specified in to detail a uniform test method for Category 2. determining USB connector Solderability solderability. The test procedure contained herein utilizes the solder dip technique. It is not intended to test or evaluate solder cup, solder eyelet, other hand-soldered type, or SMT type terminations., T able 6-8. USB Electrical, Mechanical, and Environmental Compliance Standards Table 6-7. USB Electrical, Mechanical, and Environmental Compliance Standards (Continued) Test Description Test Procedure Performance Requirement UL 94 V-0 The manufacturer will require its thermoplastic resin vendor to This procedure is to ensure supply a detailed C of C with each Flammability thermoplastic resin compliance to resin shipment. The C of C shall UL flammability standards. clearly show the resin’s UL listing number, lot number, date code, etc. UL 94 V-0 The manufacturer will require its thermoplastic resin vendor to This procedure is to ensure supply a detailed C of C with each Flammability thermoplastic resin compliance to resin shipment. The C of C shall UL flammability standards. clearly show the resin’s UL listing number, lot number, date code, etc. The object of this test is to insure Impedance must be in the range the signal conductors have the specified in Table 7-9 (ZO). proper impedance. 1. Connect the Time Domain Reflectometer (TDR) outputs to the impedance/delay/skew test fixture (Note 1). Use separate 50 Ω cables for the plus (or true) and minus (or complement) outputs. Set the TDR head to differential TDR mode. Cable Impedance 2. Connect the Series "A" plug of (Only required for high-/full-speed) the cable to be tested to the text fixture, leaving the other end open-circuited. 3. Define a waveform composed of the difference between the true and complement waveforms, to allow measurement of differential impedance. 4. Measure the minimum and maximum impedances found between the connector and the open circuited far end of the cable., Table 6-8. USB Electrical, Mechanical, and Environmental Compliance Standards Table 6-7. USB Electrical, Mechanical, and Environmental Compliance Standards (Continued) Test Description Test Procedure Performance Requirement The object of this test is to insure Refer to Section 7.1.17 for that adequate signal strength is frequency range and allowable presented to the receiver to attenuation. maintain a low error rate. 1. Connect the Network Analyzer output port (port 1) to the input connector on the attenuation test fixture (Note 2). 2. Connect the Series “A” plug of the cable to be tested to the test fixture, leaving the other end open-circuited. 3. Calibrate the network analyzer and fixture using the appropriate calibration Signal Pair Attenuation standards over the desired (Only required for high-/full-speed) frequency range. 4. Follow the method listed in Hewlett Packard Application Note 380-2 to measure the open-ended response of the cable. 5. Short circuit the Series “B” (or “ mini-B”) “B” end (or bare leads end, if a captive cable) and measure the short-circuit response. 6. Using the software in H-P App. Note 380-2 or equivalent, calculate the cable attenuation accounting for resonance effects in the cable as needed., T able 6-8. USB Electrical, Mechanical, and Environmental Compliance Standards Table 6-7. USB Electrical, Mechanical, and Environmental Compliance Standards (Continued) Test Description Test Procedure Performance Requirement The purpose of the test is to verify High-/full-speed. the end to end propagation of the cable. See Section 7.1.1.1, Section 7.1.4, Section 7.1.16, and 1. Connect one output of the Table 7-9 (TFSCBL). TDR sampling head to the D+ and D- inputs of the Low-speed. impedance/delay/skew test fixture (Note 1). Use one 50 Ω See Section 7.1.1.2, cable for each signal and set Section 7.1.16, and Table 7-9 the TDR head to differential (TLSCBL). TDR mode. 2. Connect the cable to be tested to the test fixture. If detachable, plug both connectors in to the matching fixture connectors. If captive, Propagation Delay plug the series “A” plug into the matching fixture connector and solder the stripped leads on the other end to the test fixture. 3. Measure the propagation delay of the test fixture by connecting a short piece of wire across the fixture from input to output and recording the delay. 4. Remove the short piece of wire and remeasure the propagation delay. Subtract from it the delay of the test fixture measured in the previous step.,

Table 6-8. USB Electrical, Mechanical, and Environmental Compliance Standards Table 6-7. USB Electrical, Mechanical, and Environmental Compliance Standards (Continued) Test Description Test Procedure Performance Requirement

This test insures that the signal on Propagation skew must meet the both the D+ and D- lines arrive at requirements as listed in the receiver at the same time. Section 7.1.3. 1. Connect the TDR to the fixture with test sample cable, as in the previous section. Propagation Delay Skew 2. Measure the difference in delay for the two conductors in the test cable. Use the TDR cursors to find the open- circuited end of each conductor (where the impedance goes infinite) and subtract the time difference between the two values. The purpose of this test is to insure See Section 7.1.1.2 and Table 7-7 the distributed inter-wire (CLINUA). capacitance is less than the lumped capacitance specified by the low-speed transmit driver. 1. Connect the one lead of the Impedance Analyzer to the D+ pin on the Capacitive Load impedance/delay/skew fixture (Note 1) and the other lead to Only required for low-speed the D- pin. 2. Connect the series "A" plug to the fixture, with the series “B” ( or “mini-B”) “B” end leads open-circuited. 3. Set the Impedance Analyzer to a frequency of 100 kHz, to measure the capacitance. Note1: Impedance, propagation delay, and skew test fixture This fixture will be used with the TDR for measuring the time domain performance of the cable under test. The fixture impedance should be matched to the equipment, typically 50 Ω. Coaxial connectors should be provided on the fixture for connection from the TDR. Note 2: Attenuation text fixture This fixture provides a means of connection from the network analyzer to the Series "A" plug. Since USB signals are differential in nature and operate over balanced cable, a transformer or balun (North Hills NH13734 or equivalent) is ideally used. The transformer converts the unbalanced (also known as single-ended) signal from the signal generator which is typically a 50 Ω output to the balanced (also known as differential) and likely different impedance loaded presented by the cable. A second transformer or balun should be used on the other end of the cable under test to convert the signal back to unbalanced form of the correct impedance to match the network analyzer., 6.7.1 Applicable Documents American National Standard/Electronic Industries Association ANSI/EIA-364-C (12/94) Electrical Connector/Socket Test Procedures Including Environmental Classifications American Standard Test Materials ASTM-D-4565 Physical and Environmental Performance Properties of Insulation and Jacket for Telecommunication Wire and Cable, Test Standard Method ASTM-D-4566 Electrical Performance Properties of Insulation and Jacket for Telecommunication Wire and Cable, Test Standard Method Underwriters’ Laboratory, Inc. UL STD-94 Test for Flammability of Plastic materials for Parts in Devices and Appliances UL Subject-444 Communication Cables 6.8 USB Grounding The shield must be terminated to the connector plug for completed assemblies. The shield and chassis are bonded together. The user selected grounding scheme for USB devices, and cables must be consistent with accepted industry practices and regulatory agency standards for safety and EMI/ESD/RFI. 6.9 PCB Reference Drawings The drawings in Figure 6-12, Figure 6-13,Figure 6-17 through Figure 6-20 and Figure 6-14 describe typical receptacle PCB interfaces. These drawings are included for informational purposes only., 87654321HH16.0 REF 6.5 REF 13.1 REF 2.80 + 0.10 13.9 REF 2.0 REFGG14.3 REF 10.3 REF 3.8 REFFF15.0 REF 7.6 REF 6.00 + 0.10 12.5 + 0.10 R 0.64 + 0.13 Typical (2) 11.1 + 0.10 1.84 + 0.05E1234E5.12 + 0.10 9.0 REF 10.7 REF 2.56 + 0.05 Thermoplastic Insulator UL 94-V0 D 2.50 + 0.05 2.50 + 0.05 1.0 + 0.05 Wide - Selectively Plated Contact (4) D 2.00 + 0.05 Ø 0.92 + 0.10 (4) NOTES: 7.00 + 0.10 1. Critical Dimensions are TOLERANCED C 2.00 + 0.10 and should not be deviated. C 2. Dimensions that are labeled REF are typical dimensions and may vary from manufacturer to manufacturer. 2.71 + 0.10 B 13.14 + 0.10 3. All dimensions are in millimeters (mm) unless B otherwise noted. Ø 2.30 + 0.10 (2) Printed Circuit Board (PCB) Layout Single Pin-Type

Series "A" Receptacle

A A SIZE DATE DRAWING NUMBER REV A 2/98 N/A C SCALE: N/A SHEET 1 of187654321

Figure 6-12 Figure 6- 17 . Single Pin-type Series "A" Receptacle

, 876543211234HH15.60 REF 14.70 ± 0.101234GG3.70 REF 13.78 + 0.10 12.30 REF F 2.62 ± 0.05 11.01 ± 0.10 F 5.70 REF 3.07 ± 0.10 (2) 7.00 ± 0.10 2.00 REF 2.00 ± 0.10 2.50 ± 0.10 12.50 + 0.10 2.50 ± 0.10EE2.62 ± 0.05 5.68 ± 0.10DDØ0.92 ± 0.10 (8) 10.28 ± 0.20 Ø 2.3 ± 0.10 (4) 11.10 REF 10.30 REF C Connector Front Edge C 16.95 REF Printed Circuit Board (PCB) Layout NOTES: 1. Critical Dimensions are TOLERANCEDBBand should not be deviated. 5HIHUHQFH'UDZLQJ2QO\ 2. Dimensions that are labeled REF are typical dimensions and may vary from Dual Pin-Type manufacturer to manufacturer.

Series "A" Receptacle

A A 3. All dimensions are in millimeters (mm) SIZE DATE DRAWING NUMBER REV unless otherwise noted. A 2/98 N/A C SCALE: N/A SHEET 1 of187654321

Figure 6-13 Figure 6- 18 . Dual Pin-type Series "A" Receptacle

, 876543211.0 + 0.05 Wide - Selectively Plated Contacts (4) ... H H Thermoplastic Insulator UL 94-V0 ... 2 1 7.78 + 0.10 G 11.50 REF G 5.60 + 0.1034FF2.71 + 0.10 3.01 + 0.10 3.50 REF 2.50 + 0.10 8.45 + 0.10 2.00 + 0.10 4.71 + 0.10EE12.04 + 0.10 2.50 + 0.10 12.00 REF 4.77 + 0.10 2.00 + 0.10DD10.30 REF 2.71 + 0.10 C 16.00 REFCØ0.92 + 0.1 (4) NOTES: Ø 2.30 + 0.1 (2) 1. Critical Dimensions are TOLERANCED Printed Circuit Board (PCB) Layout B and should not be deviated. B 2. Dimensions that are labeled REF are typical dimensions and may vary from manufacturer to manufacturer. Single Pin-Type 3. All dimensions are in millimeters (mm) Series "B" ReceptacleA A unless otherwise noted. SIZE DATE DRAWING NUMBER REV A 2/98 N/A C SCALE: N/A SHEET 1 of187654321

Figure 6-14F igure 6-19 . Single Pin-type Series "B" Receptacle

, Figure 6 -20. Single Pin-Type Series “Mini-B” Receptacle]
15

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