Open-collector VS bipolar lines on I2C devices

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  1. - 19th November 2005, 16:24 #2
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    Demon, If you use bipolar drive then the acknowlege bit sent from the slave component on the bus will be driving onto an active output, It really needs to be an open collector drive as the master w/pullups to be compatable with the I2C bus specification. As far as I know this option was put into place for devices that do not send an acknownege bit which there are few.

    Dave Purola,
    N8NTA
    Last edited by Demon; - 4th October 2016 at 18:05.
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