Gearmo USB to UART with +3.3V TTL Adapter

The USA-TTL3 USB to Serial UART Transistor-Transistor Logic (or TTL level) adapter allows you to connect your computer through USB port and use it as a regular serial communication. All USB protocol is handled within this adapter. There is no other device or programming required.

The Mini USB 8-pin Male connector supports the UART interface, this 3 foot adapter is perfect for embedded systems that require a serial connection to a computer. The board attaches directly to the USB bus via a standard type A receptacle connector. The TTL cable adapter shows up on any Windows computer as a standard serial COM port. Any applications that talk to this COM port is automatically converted to USB and back to UART.

USB to UART with +3.3V TTL Adapter Features

• Compliant with USB ver. 2.0 & 1.1


• Fully assisted hardware (RTS#/CTS#) or X-On / X-Off software handshaking


• UART interface support for 7 or 8 data bits, 1 or 2 stop bits and odd / even / mark / space / no parity


• +3.3V output allows external logic to be powered from the USB port


• Voltage level Supports +3.3V based UART signals and +3.3V / 50mA power output


• Upstream connector type A Male


• Device connector Mini USB 8-pin Male


• Molded PVC Housing

Mini USB Pin Assignment

• Pin 1 - VCC


• Pin 2 - TX


• Pin 3 - CTS


• Pin 4 - X


• Pin 5 - X


• Pin 6 - RTS


• Pin 7 - RX


• Pin 8 - GND