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556 or 2 555?

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bogdanfirst

New Member
can i use 2 555 isntead of a 556? i know i have to connect the power pins from the 2 555's but apart from that is there any difference?
 

Pilot

New Member
I always use 555s instead of 556s. This is only as I have a box full of 555s & i'm too lazy to order some 556s.

The 556 will run warmer than the 555, as each timer can sink/source 200mA, despite the greater surface area.

Otherwise, no operational differences that I am aware of.
 

lavenatti

Member
If you do have trouble, add a capacitor across the power supply pins. I've run into trouble with lousy power supplies.
 
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