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USB to Serial UART 5V TTL Header Cable

Part # GM-TTL5VT
Product Rating:
(23 reviews)

Use a 6-pin TTL header connector interface for your serial communications. The 3ft. USB serial UART cable adapter has a +5V output powered from the USB Type-A port. LED's activity lights located in the translucent USB jacket lets you know power and signal is active.


USB to Serial UART 5V TTL Header Cable

Part # GM-TTL5VT
Product Rating:
4.6 out of 5 stars
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The GM-TTL5VT USB to TTL 5V Header Cable is a USB to Serial UART (TTL Level) 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 5V TTL Header Serial Cable image GM-TTL5VT

USB to Serial UART 5V TTL Header Cable embedded connector image

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” Male 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 Serial interface to 6-pin header.
  • 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
  • Fully assisted hardware (RTS#/CTS#) or X-On / X-Off software handshaking.
  • Data transfer rates from 300 baud to 3 Mbaud at TTL levels.
  • +5V output allows external logic to be powered from the USB port
  • VCC Output rating current Max. 450mA
  • Transmit and receive LEDs
  • UHCI / OHCI / EHCI host controller compatible
  • Low USB bandwidth consumption.

6-Pin Header Assignment:

  • Pin 1 GND
  • Pin 2 CTS
  • Pin 3 VCC
  • Pin 4 TXD
  • Pin 5 RXD
  • Pin 6 RTS

OS Support:

  • WinXP, Vista, 7, Server 2003, Server 2008 and Greater
  • OS-X
  • Linux

Packages Contents:

  • GM–TTL5VT USB to 5V TTL Header Cable
  • Latest FTDI Driver (also available for download)
  • GM-TTL5VT Product Manual (available for download)

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Manufacturer: GearmoWarranty: 1 YearAvailability: Available
Barcode: 729440625849Ship Weight: 0.33Condition: New
Part Number: GM-TTL5VTColor: BlackLength/Size: in
Port Count: --Port Type: --Input Voltage: Unspecified or N/A
Temperature(Op): --ESD Protection: --Serial Modes: --
LEDs: --Isolation: --Chip: --


Manufacturer: Gearmo
Barcode: 729440625849
Part Number: GM-TTL5VT
Warranty: 1 Year
Ship Weight: 0.33
Color: Black
Availability: Available
Condition: New
Port Count: --
Port Type: --
Input Voltage: Unspecified or N/A
Temperature(Op): --
ESD Protection: --
Isolation: --
Serial Modes: --
LEDs: --
Chip: --

User Reviews

Product Rating:
4.6 out of 5 stars


Product Rating:
5 out of 5 stars
Just plugged it into my Windows 10 machine and it worked!

By: Kilroy07 on 11/06/2016

Finally, something that JUST WORKS.There are times to tinker around and times when you just need something to work. Glad I payed a little extra for a really quality product! Now I can get back to messing around with my Arduino pro minis.
Product Rating:
2 out of 5 stars
too costly for $19, does not work on windows 10

By: Gadget on 09/27/2016

Bought is specifically because it had advertised that it works on windows 10, not true, driver is not signed and there is no way it could be used on windows 10 with latest updates, too costly for $19 as there are sellers selling it for less than half of it
Product Rating:
4 out of 5 stars
Note that the output is TTL, not RS232

By: da_amazon6 on 08/08/2016

Note that the FT232 chip used in this does not have a charge pump necessary to generate -6/+6V used by RS-232. This is a "TTL" output: Vlow=0V and Vhi=5V. It will NOT work for applications requiring RS-232.
Product Rating:
5 out of 5 stars
Five Stars

By: Robert King on 07/25/2016

Perfect; operates as intended. Seems well made for a bargain price.