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Forums
Engineering
Electrical Engineering
Choosing pull down resistor
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[QUOTE="rbelli1, post: 5460078, member: 315621"] 10K is usually the default selection for pullup and pulldown resistors. If you don't care how much power it takes then you don't really need to go farther. For most applications it is negligible power. If you are using batteries to power it and wan very long run times you should go higher. 500K would be usable over all conditions in the datasheet. Look at Iin and Vil Max. (Other current paths on the input + Lin) * R must be less than Vil Max for all of the conditions you expect. At room temperature and 18V operation this could be hundreds of Meg. BoB [/QUOTE]
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Forums
Engineering
Electrical Engineering
Choosing pull down resistor
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