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About PCM1681

yoshihiro hirata
Expert 1425 points
Other Parts Discussed in Thread: PCM1681

PLS let me following questions.

1. Are DATA1, 2, 3 and 4 of PCM1681 input pins pull-up or pull-down in internal?

2. When we don't use these input pins, do these pins need pull-up?

Best regards,

Y. Hirata

  • 0
    TI__Mastermind 27990 points
    Hi Y. Hirata,

    I suspect that there are internal pull downs because with a quick test I powered the board and probed the data inputs and were all GND. I then tried pulling the pins high to see if they would float and they did not. When not used I would suggest pull downs, and I would recommend placing pads for a pull down resistor but can remain unpopulated unless problems arise.

    Justin