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4021 and 74hc(t)195
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seyyah



Joined: 07 Oct 2001
Posts: 578
Helped: 1
Post28 Jul 2004 4:33   

4021 and 74hc(t)195
What's the major differences between them. I tried 4021 and it worked for my project. So it seems enough for now. But i wonder must i choose the other one especially for future designs which may need higher speeds?
And from the view of reliability etc which one must be chosen according to you?
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flatulent



Joined: 19 Jul 2002
Posts: 4877
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Location: Middle Earth
Post28 Jul 2004 5:53   

Re: 4021 and 74hc(t)195
the 4021 is 8 bits and the 74hct195 is 4. The hc part is five times faster. I would suspect that cost would be the driver if speed is not in your application.

http://www.fairchildsemi.com/ds/CD/CD4021BC.pdf

http://xgistor.ath.cx/files/Electronics/datasheets/74HC195.pdf

are the datasheets.
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seyyah



Joined: 07 Oct 2001
Posts: 578
Helped: 1
Post28 Jul 2004 9:29   

Re: 4021 and 74hc(t)195
pardon it was 74hc595. Speed is one difference. Operating voltage is second i think according to the model. I wonder application based tips. If anyone who have used both may say something that anyone can't see in a first look.
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