USB Infrared Adapter USB IRDA $29.95

USB to 3.3v TTL PIN Header Cable

USB to 3.3v TTL PIN Header Cable

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Manufacturer: Gearmo
Barcode: 729440625832
Part Number: GM-TTL3VT
Warranty: One Year
In Stock: Yes
Ship Weight: 1 lbs.

Our Price: $29.95
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Product Rating: ★★★★★

4.8 based on 42 review(s)

Product Description

The 5 foot Serial UART USB to 3.3v TTL PIN Header Cable (TTL level) adapter allows you to connect your computer through the USB port and use it as a regular serial communication device with support for 7 or 8 data bits. All USB protocol is handled within this adapter using an FTDI Chip set. There is no other device or programming required.

USB to 3.3v TTL PIN Header Cable USB end GM-TTL3VT


The USB to 3.3v TTL PIN Header Adapter Cable is perfect for embedded systems that require a serial connection to a computer and provides a USB to TTL Serial interface to 6-pin header. The board attaches directly to the USB bus via a standard type A receptacle connector. It 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 on your target board.


Embedded USB TTL pin header cable


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

  • Win XP, 2000, 2003, CE, Vista, 7, 8
  • Linux
  • Mac OS 10.X

Package Contents:

  • USB to 3.3v TTL PIN Header Cable
  • Latest FTDI Driver (available for download)
  • GM-TTL3VT Product Manual (available for download)
Important Technical Information:

USB to 3.3v TTL PIN Header Cable

USB to 3.3v TTL PIN Header Cable - Image A
USB to 3.3v TTL PIN Header Cable - Image B

Product Rating: ★★★★★4.8 based on 42 reviews

See all customer Reviews

This is a solid interface to the FT232R chipset for bit bang mode. Tested on OS X with the native operating system driver as a virtual COM port and with the libftdi driver for bit bang mode.
Stephen McGill
April 4, 2016
The cable I received appears to be of decent quality. I received a GearMo SS-TTL3VT from Serial Stuff. Others have mentioned that they've received cables with VCC measuring 5v and a dark colored encapsulating material around the USB plug. The VCC on the cable I received measures 3.3v, and the encapsulating material around the USB plug is as clear as a new born baby's phlegm. I didn't even connect the VCC to my target device though because the target device generates its own power (3.3v). I used the cable to unbrick a realtek media player on which I had corrupted the bootloader and all other available means of recovery were inoperative. It worked just fine, nothing to complain about. The FTDI cable is about the same price as this cable at every place I checked, but it is usually only sold through electronics jobbers - which makes ordering a hassle. So, net net this cable is a reasonable deal.
R. Volpe
March 29, 2016
Didn't work so I sent it back and was reimbursed quickly!
John Jenkins
March 29, 2016
It worked well to update the firmware of a wireless temperature sensor by PrivateEyePi. I plugged it into the USB port of my Windows 7 box. I tried to plug it into my USB hub, it was not detected properly. When I plugged it into a port on the computer, it was detected properly. I loaded the drivers from the CD, and it allowed me to transfer data on a COM port. It would be nice if drivers were downloadable somewhere, because I won't have a CD ROM drive forever. But for now, it works great.
March 22, 2016