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Part Number: SN65HVS880
One of our customer is interesting in SN65HVS880 for their industrial control board.
On using 24V level input, default input status should be high status(default pull up), so they used 4.7k internal pull up on 24V high level bias for SN65HVS880 input.
But pull up resistor has high thermal when input becomes low, and it looks due to high power dissipation as I think.(24^2/4.7k=122mW.)
Just to reduce bias current, suggested to increase pull up resistor value up to 10kohm(and then, guess channel current would 2.4mA, and power will reduce around half,) but their buyer channel current spec is typically 5mA, so can’t reduce(4.7k pull up makes around 5.1mA bias current).
Do you have any idea to make default high status of SN65HVS880 without pull up resistor circuit? If they have no thermal issue, we can have more chance to apply SN65HVS880 at customer site.
Let me have your idea.
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