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  1. JeremyWilliams83

    Switching Pull up / down resistors in/out of circuit digitally

    Hello, I am tying to come up with a circuit to allow me to switch some pull up and pull down resistors in or out of the circuit on some differential signal lines (RS485 fail safe bias resistors). I need to get the enable for the pull ups across a opto to my isolated driver circuitry. Is there a...

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