When using pull up and pull down resistors, how do I calculate the value I need? I know most people randomly use a 10k or something, but I'm interested in how to actually calculate the required value.
The specific chip I'm using is a 4518 BCD counter. Here is the datasheet:
https://www.electro-tech-online.com/custompdfs/2006/12/cd4518b.pdf
Page 2 of the datasheet shows the input current, but which value do I want to use? And what do I need to use for V? I understand Ohm's law, just a little confused on which numbers to pull off the sheets.
I would appreciate some help to calculate, for example, a proper resistor value for BOTH a pullup and pulldown configuration for the input pins.
Thanks.
Greg
The specific chip I'm using is a 4518 BCD counter. Here is the datasheet:
https://www.electro-tech-online.com/custompdfs/2006/12/cd4518b.pdf
Page 2 of the datasheet shows the input current, but which value do I want to use? And what do I need to use for V? I understand Ohm's law, just a little confused on which numbers to pull off the sheets.
I would appreciate some help to calculate, for example, a proper resistor value for BOTH a pullup and pulldown configuration for the input pins.
Thanks.
Greg