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Max source/sink current for USB BIT/BCD cable outputs?

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K6MR
K6MR Member ✭✭
in Peripherals & Station Integration
New 6600 owner here. I'm going to use USB BCD cables to drive my bandpass filters and such. The band decoders have opto isolators, which ran on 5V previously. I can change the current limit resistors on the boards, but the USB Cable document does not (unless I missed it) specify what the maximum source/sink currents are for each output as well as maximum total source/sink current. Anyone know what the specs are?
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  • Alan
    Alan Member ✭✭✭✭
    Answer ✓
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    K6MR

    I have attached a pdf of the FTDI specification.

    There are two part numbers for the 3.3v and the 5v versions of the FTDI chip.

    Alan. WA9WUD

    Screen Shot 2022-09-14 at 8.10.25 PM.png
    FTDI Cable.pdf


  • K6MR
    K6MR Member ✭✭
    Answer ✓
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    Thanks much. I didn't know this was a standard FTDI product. Just what was needed.

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