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USB to 3.3V/5V Serial UART TTL Auto Sensing Adapter

USB to 3.3V/5V Serial UART TTL Auto Sensing Adapter

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Model Number GM-TTL5P
The USB to serial UART TTL adapter is auto sensing and is supported in Windows 10 or earlier OS and Mac OS and Linux. The serial UART adapter electronics automatically sense the voltage for its operation. Transmit and receive LED lights are embedded into the translucent USB molded jacket.



The GM-TTL5P USB to TTL 3.3V/5V Auto Sensing Adapter is a USB to Serial UART (TTL Auto level) adapter. It allows you to connect your computer through an available USB port and uses it as a regular serial communication. All USB protocol is handled within this adapter. There is no other device or programming required and supports plug-and-play technology.

USB to 3.3V/5V Serial UART TTL Auto Sensing Adapter GM-TTL5P

The adapter is perfect for embedded systems that require a serial connection to a computer and is compliant with USB spec. 2.0 &1.1. The board attaches directly to the USB bus via a standard type “A” receptacle connector for upstream data. The USB to Serial UART shows up on any Windows computer as a standard serial COM port. Any applications that talk to this COM port are automatically converted to USB and back to UART to your target board.

Additional Features:

  • The Cable provides a USB to TTL Auto Sensing Serial interface with various end connectors.
  • Single board USB to asynchronous serial data transfer interface
  • Entire USB protocol handled by the electronics in the cable USB
  • UART interface support for 7 or 8 data bits, 1 or 2 stop bits and odd / even / mark / space / no parity
  • Data transfer rates from 300 baud to 3 Mbaud at TTL levels.
  • Auto Voltage sensing
  • Transmit and receive LEDs
  • UHCI / OHCI / EHCI host controller compatible
  • Low USB bandwidth consumption.
5-Pin Header Pin Assignment
Pin 1 VCC
Pin 2 TXD
Pin 3 RXD
Pin 4
Pin 4 GND
OS Support:
  • WinXP, Vista, 7, 8, Windows 10, 2003, Win Server 2008 and Greater
  • Mac OS 8.6
  • OS-9, OS-X
  • Linux
Packages Contents:
  • USB to 3.3V/5V TTL Auto sensing adapter
  • Latest FTDI Driver (also available for download)
  • GM-TTL5P Product Manual (available for download)


Model Number GM-TTL5P
UPC 729440625856
Color Black
Cable Length 3 feet
Connector N/A
Tech Specs No

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