kernow boy
New Member
Hi I’m building a circuit to extend the number of input ports on a PIC device, by chaining 4 74LS165 (Shift registers). However there are a number of pins that are not used on the chips, and I remember from my college days that the unused pins should either be taken up to Vcc or down to Gnd via a resistor.
So do I take the unused pin high and low and what value resistor should I use.
Thanks in anticipation for your answers.
So do I take the unused pin high and low and what value resistor should I use.
Thanks in anticipation for your answers.