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USB to 3.3v TTL PIN Header Cable

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USB to 3.3v TTL PIN Header Cable

$29.95
SKU: GM-TTL3VT
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.

Operating System Compatibility

Description

Details

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
  • VCC Output rating current Max. 50mA
  • 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)
Additional Information

Additional Information

SKU GM-TTL3VT
UPC 729440625832
Tech Specs No
Reviews

Customer Reviews 62 item(s)

Great inghsit! That'
Great inghsit! That's the answer we've been looking for.
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Review by Melvina / (Posted on 3/10/2017)
Smart thninkig - a c
Smart thninkig - a clever way of looking at it.
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Review by Lilly / (Posted on 3/10/2017)
You really found a w
You really found a way to make this whole prscoes easier.
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Review by Kailyn / (Posted on 3/10/2017)
Thanks for writing s
Thanks for writing such an earytto-undess-and article on this topic.
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Review by Elida / (Posted on 3/10/2017)
Good to see real exp
Good to see real expertise on display. Your coitbnrution is most welcome.
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Review by Bayle / (Posted on 3/10/2017)
Wait, I cannot fatho
Wait, I cannot fathom it being so sthofgrtiarward.
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Review by Kevrell / (Posted on 3/10/2017)
If only there were m
If only there were more clveer people like you!
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Review by Marylouise / (Posted on 3/10/2017)
Well made
Worked perfectly for running an update on an ESP8266 that I had. The wires don't seem to be so flimsy they will break in my bag and online documentation is good.
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Review by Jon / (Posted on 2/15/2017)
Useful...
Meets my needs.
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Review by Edwin Ng / (Posted on 2/15/2017)
Five Stars
Works good
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Review by Amazon Customer / (Posted on 2/1/2017)
Windows 10 & Davis Vantage Pro 2. Works!
Works perfectly in Windows 10. I attached the Vantage Pro2 and it communicates perfectly. Remember to connect TX to RX and RX to TX and short the CTS to RTS - Brown to Green. The command to wake the console up is \n. Baud rate 19200. Type TEST and enter and it should return TEST. LAMPS 1 - turns the console lamp on, LAMPS 0 - off (via Hyperterm).
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Review by J. Payne / (Posted on 1/17/2017)
Cheaply made too, but worked for me to de-brick a router & install DD-WRT firmware to it
After a slight modification, I was able to bring a bricked router back to life and install DD-WRT firmware to it. I give it 4 stars because there weren't very good instructions on where to find the drivers to use it properly, and it would have actually been a more useful item if it came with a pin header block and single wire jumper dongle. I've worked with TTL chips before and I've never used this cables TTL Header pin-out configuration before, so it seems to make more sense to just put single wire plastic jumper pin headers on each wire than putting it on this old school CD-ROM audio cable molding. But... there is probably some reason associated with mass production that I might not be aware of as to why that is.

I ended up making my own out of an old CD-ROM audio connector in about 10 minutes though. It's pretty cheaply made too, but works ok. I wouldn't flex the joint where the cable meets the USB connector if you can avoid it.
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Review by kanidrive / (Posted on 12/8/2016)
Very useful for debugging a BeagleBone Black
Don't get why the price is so high on these things, but it works. Very useful for debugging a BeagleBone Black.
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Review by mzimmers / (Posted on 11/4/2016)
Five Stars
Works with Beaglebone Black.
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Review by David Jones / (Posted on 5/28/2016)
Five Stars
Thanks
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Review by park jade yong / (Posted on 5/1/2016)
Work great with Arduino Ethenet
This is what you need if you have an Arduino Ethenet.
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Review by Whistler / (Posted on 4/29/2016)
This is a solid interface to the FT232R chipset for ...
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.
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Review by Stephen McGill / (Posted on 4/3/2016)
Nice Cable
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.
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Review by R. Volpe / (Posted on 3/28/2016)
Five Stars
Didn't work so I sent it back and was reimbursed quickly!
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Review by John Jenkins / (Posted on 3/28/2016)
Five Stars
Didn't work so I sent it back and was reimbursed quickly!
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Review by Jenks / (Posted on 3/28/2016)
High Quality FTDI Cable
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.
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Review by C.N. / (Posted on 3/21/2016)
Needed it after some bad router setting locked up my router
Needed it after some bad router setting locked up my router.

This cable worked great to clear the nvram so I could get my router going again.

I bought mine from serialstuff. It had a 3.3v vcc. Drivers installed automatically on windows 7. Def recommend.
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Review by Insert name here. / (Posted on 3/15/2016)
This worked as intended. This actually helped me save ...
This worked as intended. This actually helped me save my router from the soft-bricking I caused by not paying attention to instructions.... And now everything works! Would buy-in-an-emergency again!

Pros:
+Easy to re-wire to fit your specific needs

Cons:
- Couldn't find any!
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Review by Justin W. / (Posted on 3/6/2016)
Pretty Good; Does the Job
Minor issue: It needs to have pin 1 clearly marked.
Also, a great big sticker "3.3 Volts DO NOT USE IN 5V SYSTEM" would be wise.
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Review by D. Chapman / (Posted on 2/15/2016)
Five Stars
Used to access linux based N300 Netgear router and re-flash software.
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Review by rabil / (Posted on 1/9/2016)
Works great with Minnowboard Max
Works great on my Minnowboard Max!
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Review by Brian Delgado / (Posted on 12/22/2015)
Great product, dependable and plugs right in.
Really nice to have this well made 3V3 serial adapter. It works well and easily configures into a port and stays there. Love that it lights up to show that there are messages going across the wire.
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Review by KC / (Posted on 11/20/2015)
Beagle bone Black must HAVE
Absolute must have cable for connecting system output messages from your Beaglebone Black to Putty on your Windows desktop.
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Review by YNot / (Posted on 9/4/2015)
It Just Works!
No fuss.
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Review by what_I_think / (Posted on 8/30/2015)
Was able to unbrick my R6300 V1 in seconds after having it laying around for months after a bad DDWRT flash
Worked! Was able to unbrick my R6300 V1 in seconds after having it laying around for months after a bad DDWRT flash.
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Review by PSY0NIC / (Posted on 4/25/2015)
Was able to unbrick my R6300 V1 in seconds after having it laying around for months after a bad DDWRT flash
Worked! Was able to unbrick my R6300 V1 in seconds after having it laying around for months after a bad DDWRT flash.
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Review by Ben / (Posted on 4/25/2015)
It is what it is, works and ok price.
It is what it is, price is right and it works.
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Review by . / (Posted on 4/19/2015)
Patience and detail. This can save your gear
Saved my netgear r7000 after i bricked it. A router that became more expensive after i had it.
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Review by Ryan A. Shuput / (Posted on 3/30/2015)
Great for MinnowboardMAX
This worked perfectly with a MinnowboardMAX. Pay attention as to which pin is pin 1 (the one with the black wire, which is ground). I needed a FTDI driver for Windows (a web search for "FTDI drivers" will find them), and I used RealTerm (freeware on Windows) to view the output.
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Review by S. Lionel / (Posted on 1/13/2015)
Works great.
Works just like FTDI TTL-232R-3V3 and lower cost.
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Review by Bob Pomeroy / (Posted on 1/3/2015)
Glad I got it, it works for multiple boards
I was a little put off by the price when I ordered this, but it is a very universal serial connector and I've used it on Intel Galileo Gen 2, as well as BeagleBone Black. I don't believe this would work for a raspberry pi, for that you need the TTL cable with the separated headers. There is some added quality that is noticeable once you start to use it, there is an led in the usb plug that flashes with every keystroke - very cool.
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Review by Jim Kane / (Posted on 12/13/2014)
Works great. USB plug lights up to show data transmit
Works great. USB plug lights up to show data transmit. Header comes off nicely for access to individual pins.
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Review by Z / (Posted on 11/30/2014)
Works great on Netgear WNR3500Lv2
It works brilliantly with my Netgear WNR3500Lv2 which I bricked trying to flash. The pin out is as follows:

Pin -> Name -> Type -> Colour -> Description
1 -> GND -> GND -> Black -> Device ground supply pin.
2 -> CTS# -> Input -> Brown -> Clear to Send -> Control input / Handshake signal.
3 -> VCC -> Output -> Red -> +5V output
4 -> TXD -> Output -> Orange -> Transmit Asynchronous Data output.
5 -> RXD -> Input -> Yellow -> Receive Asynchronous Data input.
6 -> RTS# -> Output -> Green -> Request To Send Control Output / Handshake signal.

You can get more details here:
http://www.ftdichip.com/Support/Documents/DataSheets/Cables/DS_TTL-232R_CABLES.pdf

I used the following guide to help me unbrick my router:
http://www.myopenrouter.com/article/36609/How-to-Debrick-Your-WNR3500Lv2-Using-Windows-and-a-USB-TTL-Cable/

To remove the pins, use a tiny screw driver and lift the small plastic tabs (hard to see, but those are individual tabs on each pin) and slide out the pins.

I'm using Toastman TomatoUSB firmware for my router, make sure you only use .chk firmware and not .trx (which will brick it again :)

BTW mine came with a clear plastic head just as show in the picture. And the QUALITY is awesome! real good stuff and sturdy.
Pricey at 18 bucks but the quality shows.

I used Windows 8.1 with a DELL E6430 laptop with USB 3.0 ports and the Windows detected the cable and installed the drivers by itself. I used PUTTY and the cable worked perfectly on the first try.

I'm giving it 4 stars because it's expensive and really could have been half the price and yet get the job done and made good profits.
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Review by Informed Buyer / (Posted on 10/24/2014)
Five Stars
Works with my Linksys WRT610N.
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Review by Slaveā„¢ / (Posted on 9/9/2014)
Five Stars
Works with my Linksys WRT610N.
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Review by Fat Slav / (Posted on 9/9/2014)
Five Stars
Good cable, works as described, plugged into a serial port using Linux and it worked right out the box.
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Review by Oscar Rivera / (Posted on 8/20/2014)
Works as advertised
Used it to fix a Netgear R6300 wireless router. It was a convoluted process, the instructions to reload the firmware on the reference website were confusing at one point (pin connection) but it worked as advertised once I figured out the wiring issue.
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Review by speedy240 / (Posted on 6/25/2014)
work perfectly
i bought this one for 3 times for my work need. everytime it works like the way i am expecting.
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Review by George / (Posted on 6/1/2014)
Works like a charm.
Though, the price is quite too high comparing to those 5v ttl, but I have looked around so many sites and this one was the cheapest and the most suitable for my dev boards.
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Review by P / (Posted on 5/29/2014)
Works like a charm.
Though, the price is quite too high comparing to those 5v ttl, but I have looked around so many sites and this one was the cheapest and the most suitable for my dev boards.
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Review by Nakarin / (Posted on 5/29/2014)
Was worried about the strange brand but it is all good
This interfaces to my 3.3 Volt system with no issue. The pin out was not immediately available with it but I got it from the other reviews or from the manufacturer website.
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Review by Amazon Customer / (Posted on 5/22/2014)
3.3v VCC pin!
The review that stated it put out 5V on VCC made me a little bit nervous. I decided to take the chance, and am happy to report that VCC on my cable puts out 3.32V. The standard FTDI driver works just fine, and it follows the standard FTDI 3v3 cable pinout/wire colorings.

If you're buying this cable, you're probably a bit of a hacker. The fact that it doesn't come with a paper manual shouldn't bother you much.
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Review by Kevin Wightman / (Posted on 4/22/2014)
Lack of Documentation
I would imagine that the cable would come with the wiring chart of the pin-outs but noting came and I was forced to do research on the Internet to get the information.

After viewing the pin-outs, it all worked fine.

This could be the problem with the supplier or manufacturer for lack of documentation.
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Review by Steve Johnson / (Posted on 2/17/2014)
Good Value, Works Well
This device has an identical pin-out as FDDI's TTL-232R-3V3 USB cable...

[...]

The 6-pin single-inline 0.1" pitch connector is constructed as follows:

pin 1: black GND
pin 2: brown CTS (input to USB)
pin 3: red VCC (+3.3V power from USB, 75 mA max.)
pin 4: orange TX (output from USB)
pin 5: yellow RX (input to USB)
pin 6: green RTS (output from USB)

What I was shipped does not have a clear over-mold as shown on the Amazon Website. The plastic molding on my USB connector is quite dark---almost black. Nevertheless the green TX LED and the red RX LED are quite visible.

I bought three of these to use under MS Windows 7 and Linux. I'm going to buy more. For example. this device is useful for monitoring the console serial port on a Beglebone Black and/or Raspberry Pi. The latter requires an "adapter" cable.

The price of this device is better than the equivalent cable from FDDI and the function/quality is identical. In fact, because the cable diameter is not as thick, I like it better than FTDI's.

Bruce D. Lightner
La Jolla,CA
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Review by Bruce D Lightner / (Posted on 12/12/2013)
Good Fit
Good snug fit on pins and the usb header. This cable has been working and holding up well for me.
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Review by MaeFourth / (Posted on 12/8/2013)
Great Unit, Great Price. Suitable for professional engineering/lab work.
I'm an electrical engineer and have used this for multiple projects to interface with 3.3V microcontrollers (Texas Instruments MSP430) directly to a USB port on my machine. Works great with RealTerm.
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Review by reviewer1234 / (Posted on 11/22/2013)
Works, solidly constructed.
The cable works well. My only complaint is that I had to search the web to find documentation on which end of the 6-wire connector is pin 1; a small sheet of paper with minimal documentation would have saved that trouble.
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Review by Jason Evans / (Posted on 11/10/2013)
You can't go wrong with FTDI
As always, FTDI products work superbly compared to those that are Prolific based. Drivers are included, but already on Win7 machines
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Review by Waterman / (Posted on 11/6/2013)
Works as expected
I plugged in in on Ubuntu 13.04 then fired up minicom and everything just worked. That's all I can say. For those wondering, this works fine with a BeagleBone Black.
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Review by That Guy / (Posted on 9/18/2013)
product works well...once you figure out how to get documentation
When I first recevied it, it was not clear where to get the documentation, but once I found it, the porduct works well.
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Review by alan cordeiro / (Posted on 8/3/2013)
USB to 3.3v TTL Header like FTDI TTL-232R-3V3
I've bought it for debricking my Linksys E2000 router. Not yet tested, but I have to say, the quality is very good.
Also delivered in time. Good device. A must-have device for bricked device recovery with on-board TTL port.
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Review by G. Bakanidze / (Posted on 7/16/2013)
Worked perfectly for various 3.3V TTL devices.
This worked for various devices, including ones with only TX, RX, GND, and VCC headers. If RTS and CTS aren't present on your device's TTL header, simply don't connect them. Also recommend not bothering to connect VCC.

Included a CD with product data sheets, which can also be found on the web. Wiring is:

black GND
brown CTS
red VCC (3.3V)
orange TX
yellow RX
green RTS
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Review by Admiral Joey / (Posted on 7/10/2013)
Good cable
I am using this interface for debug purposes on a project that I'm working on. Plug and play, no issues. The schematic is provided on the driver CD that accompanies the cable (purchased from SerialStuff). I like the clear casing on the USB side that shows the chip.
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Review by James / (Posted on 7/9/2013)
Nice cable, works on my JP1.x remote
I got this cable because of it's RTS and CTS pins as well as being equipped with an FTDI chip and I definitely got what was in the description. Tested out on my JP1.x remote that needs the RTS line in addition to the usual TTL line - hence why I chose this cable over a cheaper 4-pin - and it works flawlessly. Build quality on first impression is good and looks to be on par with other well made cables but ultimately time will tell.

As far as all the comments about no pin out information included with the cable, I can only assume the issue has been rectified as the PDF on the included driver/manual disk has a slew of information including the very valuable pin outs that happen to be exactly the same (color and pin location) as the genuine FTDI brand cable.
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Review by P. Clarke / (Posted on 3/23/2013)
Perfect for unbricking routers
I bought this on recommendation from the DD-WRT and Tomato forums after I managed to brick my new Netgear router. This cable was recognized by my Windows 8 laptop (if it doesn't work on one USB port, try another one on the computer; mine didn't work on the USB 3.0 port, but worked perfectly on the USB 2.0 port).
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Review by ToddPh / (Posted on 1/7/2013)
Good item, pin out info missing from cd-rom
Item is well built and performed exactly as I needed. The included CD-ROM contains drivers and documentation. Pin out information is listed in the index of the .pdf file, but the pages are missing.
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Review by packrat0x / (Posted on 9/3/2012)
Nice cable. No pinout information supplied.
I've updated my rating on this item due to more information received by another reviewer. 4 stars now. Cable is fine and documentation is findable if you know where to look.

Pinout: [...]
Driver: [...]

Documentation supplied with the cable does not give you this information.

===========
I was looking forward to using this cable, but there is absolutely no pin out information in the supplied documentation. The cable came with a mini-CD that had a User's Manual. The User's Manual has sections defined in the Table of Contents titled "Specifications" and "Pinouts," but alas, there is no information in the body of the document associated with either of these two sections.
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Review by jt / (Posted on 9/18/2011)