Paul__B:
Palatis:
I thought most TTL ICs are capable of handling 50mA current (sink or source) per output pin?
if you just need 22mA, 74595 should be fine.You clearly thought wrong then!
Take a look at the basic 7400 datasheet. Note the specifications for low drive as sixteen milliamps, and drive high as 400 microamps. Short circuit current possibly as high as 55 mA for one output only.
omg glad my circuit didn't burn.
may have to redesign something = =
thx for pointing out.