I am a hobbyist but have learned a great deal recently, to the extent that i am now designing circuits with ICs in.
My question is this - in all the data sheets I've seen for the ICs I've used (4013, 4093) it says the maximum current for the inputs is 10mA. but it doesn't state a minimum. I'm trying to design automobile circuits to draw as little current as possible so I'd like to know how low I can reliably go.
Also, when it says to ground any unused inputs, if i connect them directly to ground, they sink/source around 10mA. Is it OK to use an appropriate resistor to minimise current draw from unused inputs/outputs.
Thanks.
John.
My question is this - in all the data sheets I've seen for the ICs I've used (4013, 4093) it says the maximum current for the inputs is 10mA. but it doesn't state a minimum. I'm trying to design automobile circuits to draw as little current as possible so I'd like to know how low I can reliably go.
Also, when it says to ground any unused inputs, if i connect them directly to ground, they sink/source around 10mA. Is it OK to use an appropriate resistor to minimise current draw from unused inputs/outputs.
Thanks.
John.