4-wire cable
Type-A (USB 2)
Classic Type-A with four-wire USB 2.0 contact set.
- VBUS+5V power rail
- D+ / D-USB 2.0 differential data pair
- GNDPower/signal return
- 4-wire cableVBUS, D+, D-, GND only
- No SS lanesNo SuperSpeed TX/RX pins
VBUS+5V power rail
D+ / D-USB 2.0 differential data pair
GNDPower/signal return
4-wire cableVBUS, D+, D-, GND only
No SS lanesNo SuperSpeed TX/RX pins
8-wire cable
Type-A (SuperSpeed)
SuperSpeed Type-A adds extra lane contacts while preserving legacy row.
- VBUS / D+ / D- / GNDLegacy USB 2.0 pins retained
- StdA_SSTX+/-SuperSpeed transmit differential pair
- StdA_SSRX+/-SuperSpeed receive differential pair
- GND_DRAINSignal return / EMI drain
- 9-pin interface4 legacy + 5 SuperSpeed pins
VBUS / D+ / D- / GNDLegacy USB 2.0 pins retained
StdA_SSTX+/-SuperSpeed transmit differential pair
StdA_SSRX+/-SuperSpeed receive differential pair
GND_DRAINSignal return / EMI drain
9-pin interface4 legacy + 5 SuperSpeed pins
4-wire cable
Type-B (USB 2)
Square peripheral plug with four-pin USB 2.0 interior.
- VBUS+5V downstream power
- D+ / D-USB 2.0 differential data
- GNDGround return
- 4-pin Type-BPeripheral-side square connector
- USB 2 onlyNo SuperSpeed contacts
VBUS+5V downstream power
D+ / D-USB 2.0 differential data
GNDGround return
4-pin Type-BPeripheral-side square connector
USB 2 onlyNo SuperSpeed contacts
8-wire cable
Type-B (SuperSpeed)
Extended Type-B geometry with SuperSpeed contact additions.
- VBUS / D+ / D- / GNDLegacy USB 2.0 set
- StdB_SSTX+/-SuperSpeed transmit pair (B side)
- StdB_SSRX+/-SuperSpeed receive pair (B side)
- GND_DRAINHigh-speed signal return
- 9-pin Type-BSuperSpeed extended housing
VBUS / D+ / D- / GNDLegacy USB 2.0 set
StdB_SSTX+/-SuperSpeed transmit pair (B side)
StdB_SSRX+/-SuperSpeed receive pair (B side)
GND_DRAINHigh-speed signal return
9-pin Type-BSuperSpeed extended housing
12-wire cable
Type-C
Reversible Type-C cable plug with 24 contacts in dual rows.
- VBUS (A4/A9/B4/B9)Main bus power pins
- GND (A1/A12/B1/B12)Ground return network
- D+ / D-USB 2.0 pair for backward compatibility
- SSTX / SSRX lanesSuperSpeed TX/RX differential pairs
- CC1 / CC2Cable orientation + USB PD negotiation
- SBU1 / SBU2Sideband lines for Alternate Modes
VBUS (A4/A9/B4/B9)Main bus power pins
GND (A1/A12/B1/B12)Ground return network
D+ / D-USB 2.0 pair for backward compatibility
SSTX / SSRX lanesSuperSpeed TX/RX differential pairs
CC1 / CC2Cable orientation + USB PD negotiation
SBU1 / SBU2Sideband lines for Alternate Modes