What's the difference?
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What's the difference?

 
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Theo
Guest
Posted: Fri Sep 23, 2005 12:35 am    Post subject: What's the difference? Reply with quote
Pardon my ignorance, but I know little about the
different "families" of digital TTL chips.
Can anyone please explain what the chief operating differences are (if any)
between a 74LS164 and a 74HC164?
Any assistance will be greatly appreciated.
Please reply soon.

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Walter Harley
Guest
Posted: Fri Sep 23, 2005 7:04 am    Post subject: Re: What's the difference? Reply with quote
"Theo" <theodore.twyler@ntlworld.com> wrote in message
news:77FYe.1114$3q4.877@newsfe5-gui.ntli.net...
Quote:
Pardon my ignorance, but I know little about the
different "families" of digital TTL chips.
Can anyone please explain what the chief operating differences are (if
any)
between a 74LS164 and a 74HC164?
Any assistance will be greatly appreciated.
Please reply soon.

Pick a manufacturer that makes both, pull up the datasheets, and compare
typical, min, and max values for:

- supply voltage
- quiescent supply current
- switching time
- propagation time
- input lo/hi threshold
- output fanout
- output lo and hi voltages
- output current capability
- input current
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