piclist 2001\01\19\102712a >
Thread: RA4 as output attached to TTL logic, pull-up minimum consumption
www.piclist.com/techref/microchip/ios.htm?key=output
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face BY : mikeTakeThisOuT@KILLspamwhitewing.co.uk



On Fri, 19 Jan 2001 11:06:03 +0100, you wrote:

>Dear piclisters,
>
>I am using RA4 as output pin to attack a TTL chip. Most of the time this pin shall be 0 V.
>
>Since RA4 is open drain output, I need some kind of pull-up circuit.
>Frequency is not an issue but could be in the future.
>The basic pull-up resistor would be continuously consuming energy and this is what I see 'ugly' in my design.

>Could you recomend me alternative solutions for minimum consumption?
Using obsolete parts like TTL is uglier - pull-ups are the least of
your power worries.
If using 74HC, you can usually use 100K

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In reply to: <010201c081ff$722b2e50$1500a8c0@jesus>
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