This is a USB to TTL Serial Cable which allows for a simple way to connect TTL interface devices to USB. The I/O pins of this cable are configured to operate at 3.3V specifically with a Raspberry Pi with each serial pin broken apart. Thanks to its separated pins, this cable is a perfect candidate for powering, connecting, and accessing the login and debug console on the Raspberry Pi.
The FTDI cable is designed around an FT232, which is housed in a USB-A connector. The other side of the cable is terminated with a separated 4-pin connector with the following pinout: RX (Yellow), TX (Orange), VCC (Red), and GND (Black). A link to the FTDI drivers can be found in the Documents section below.
Note: Please be aware that while the I/O pins in this cable operate at 3.3V, the VCC pin is 5V. The VCC pin is NOT 3.3V like the I/O pins.
Based on 21 ratings:
1 of 1 found this helpful:
This product works well, but I thought it was regulating the USB 5V down to 3.3V. I realize now that I didn't read closely enough.
I bought this to connect to my Raspberry Pi console. After a little experimentation, it worked fine (connect Tx to Rx; not Tx to Tx).
I found it reliable and easy to connect.
Performs right out of the box, good driver support from the manufacturer!
And here's why ...
needed an out-of-the-box solution for communicating with the UART on an Atmel XMEGA eval board.
This thing was plug in and go.
no fuss, no muss.
What else can I say?
This cable is a great price and great value. I used it to build a usb programming cradle for fire dept Motorola minitor 3 and 4 pagers. Works flawlessly after updating the drivers from the product page. The shipping was fast and packing was super.
Very happy with the purchase! The cable assembly is very reliable and we have had no issues!
0 of 1 found this helpful:
I hate ftdi i feel dirty for buying a product from them. I wish they used a cp2012 or anything else but evil ftdi.
Buy three, you know you'll need them.
It's doing what was supposed to do, the connection from place A to B.
Works like advertised
Great diagnostic tool to replace RS-232. (3.3V levels compatible with most modern MCUs / FPGAs)
The cable I received was labelled wrong! The TXD and VCC were swapped. They should have been: TXD = Orange wire, RXD = Yellow wire, VCC = Red wire, GND = Black wire. I swapped the housings (easy to do - lift the plastic tab and slide contacts out) and now it works properly. I rated it low because of poor manufacturing quality control, and my time wasted debugging the problem.
I bought this specifically for a Raspberry Pi because the description specifically mentions that. I was hoping it would come with connection directions, but I had to figure that out on my own.
Also, I discovered that this cable will power the Pi when plugged into my laptop.
I have half a dozen of these. They just work.
Plugs directly into my 3.3v PIC uart i/o for debugging.
Works well. The FTDI chip supports high speed and non-standard baud rates. I tested it up to 500 kbps.
The RX and TX headers are labelled from the frame of reference of the target (not typical). So connect Tx to Tx and Rx to Rx.
Update: I purchased more of these and the RX and TX have been swapped again. The inconsistency is no bueno. You will need to check which wire is actually TX on the scope before plugging these in.