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Alive but not working

10-20-2007, 01:54 AM

Grant Stockly Grant Stockly is offline

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Join Date: Jan 2005

Posts: 447

Wow...I must have a marginal batch of 7420s. Geoff had a problem with one of his 7420s too. Geoff, was yours functionally good but having out of spec logic outputs?

You can use any 20, like a HC20, LS20, L20, etc. You might be able to find one in another piece of hardware.

If you can't locate another one immediately you might be able to use a pull down resistor to bring the low voltage into spec?

Grant

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