USB Physical Connectors 4 pins

USB 1.1 Type-A (Low/Full Speed)

USB 1.1 Type-A is the original rectangular host-side USB connector supporting Low Speed (1.5 Mbps) and Full Speed (12 Mbps). The foundation of the USB ecosystem introduced in 1996.

// connector diagram 4 pins

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// Specifications

Standard

USB 1.1

Pin Count

Speed

1.5 Mbps Low Speed / 12 Mbps Full Speed

Voltage

5V VBUS

Current

100mA (low power) / 500mA (high power)

Connector

Type-A rectangular

// Pin Reference Table

Pin	Name	Function	Type
1	VBUS	+5V power supply	PWR
2	D-	Data negative	BUS
3	D+	Data positive	BUS
4	GND	Ground	GND

USB 1.1 Type-A is the original rectangular host-side USB connector supporting Low Speed (1.5 Mbps) and Full Speed (12 Mbps). The foundation of the USB ecosystem introduced in 1996.