nebula Posted February 15, 2011 Report Posted February 15, 2011 I am laying out a board with multiple DINs and DOUTs. I'm pretty sure I can do this, but thought I'd ask ... can I connect unused DIN pins directly to the 5V rail with no resistor?
spongebob Posted February 15, 2011 Report Posted February 15, 2011 Yes, you can. But you get the short circuit on first switching-on. ;) Of course you must connect 74HC165 pins to 5V through resistor.
TK. Posted February 15, 2011 Report Posted February 15, 2011 No, there shouldn't be a short circuit during power-on, because these pins are input-only (no drivers) So: yes, just connect the unused inputs directly to 5V Best Regards, Thorsten.
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