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[DPRG] increased output drive by CMOS and TTL devices

Subject: [DPRG] increased output drive by CMOS and TTL devices
From: Mike McCarty jmccarty at ssd.usa.alcatel.com
Date: Tue Jun 26 11:18:58 CDT 2001

On Tue, 26 Jun 2001, Ben Strednak wrote:

> Gates are fun!  
> 

> Jim, according to the datasheet, the 7400 can source 16mA.  Does that
mean 16mA per gate?  I want to drive a relay that needs 24mA through
the coil.

This is not what I recall. I recall TTL can source 400uA, and sink 16mA.

That is 16mA per gate, but there is a maximum power for the whole chip,
as well.

For what you want to do, I'd use an external transistor.

> Thanks for all the help, everybody.

Mike
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