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74LS688 vs 74LS521 [message #9789]

Sun, 27 February 2022 05:49

lynchaj
Messages: 1080
Registered: June 2016

Senior Member

Hi

Are the 74LS521 and 74LS688 equivalent? They sure seem similar when reading and comparing the datasheets. My chip tester detects 74LS688s as 74LS521s. They are both 8 bit comparators and appear to have identical pin outs. What is the difference if any?

I have a bunch of 74LS521s that never seem to get used so if these are close enough to 74LS688s I may start substituting them just to use them up.

Thoughts? Discussion? Thanks, Andrew Lynch

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[Message index]

		74LS688 vs 74LS521 By: lynchaj on Sun, 27 February 2022 05:49
		Re: 74LS688 vs 74LS521 By: monahan on Sun, 27 February 2022 10:08
		Re: 74LS688 vs 74LS521 By: lynchaj on Sun, 27 February 2022 13:26
		Re: 74LS688 vs 74LS521 By: etchedpixels on Mon, 28 February 2022 16:45
		Re: 74LS688 vs 74LS521 By: mrgcms on Mon, 28 February 2022 19:29
		Re: 74LS688 vs 74LS521 By: Sergey on Wed, 09 March 2022 11:31
		Re: 74LS688 vs 74LS521 By: lynchaj on Wed, 09 March 2022 11:33

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