Which 74 family for >100MHz ?

Bernhard · 19th May 2004, 08:24 PM

Hi,

which cmos logic family is good for highest speed ?

Bernhard

Jocko Homo · 19th May 2004, 08:29 PM

Some of us have learned the hard way is not AC/ACT.

Ever think of ECL???

Jocko

Bernhard · 19th May 2004, 08:32 PM

Where is the limit for 74xx ?

Jocko Homo · 19th May 2004, 08:37 PM

I'm sure that there are families that work that high. But after my experience with AC, I went back to ECL if it really was that fast.

Someone in Russia posted a chart of the intrinsic jitter of different families. May be in one of the I/V threads.

Sorry.....I can't help any more. I am old time ECL kind of guy. Took me a while to get comfortable with HC.

Jocko

Christer · 19th May 2004, 08:55 PM

I agree with Jocko, if ECL is a possible choice, then have a look
at it. I stopped working with digital design shortly after AS and
ALS TTL appeared, ant they caused problems. Everybody is
telling me that the newer CMOS families cause a lot more problems.

But, of course, ECL is power-hungry and want some strange
supply voltages.

19th May 2004, 08:24 PM	#1
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	Which 74 family for >100MHz ? Hi, which cmos logic family is good for highest speed ? Bernhard

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19th May 2004, 08:29 PM	#2
Jocko Homo Banned Join Date: Feb 2002 Location: As far from the NOSsers as possible	Some of us have learned the hard way is not AC/ACT. Ever think of ECL??? Jocko

19th May 2004, 08:32 PM	#3
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	Where is the limit for 74xx ?

19th May 2004, 08:37 PM	#4
Jocko Homo Banned Join Date: Feb 2002 Location: As far from the NOSsers as possible	I'm sure that there are families that work that high. But after my experience with AC, I went back to ECL if it really was that fast. Someone in Russia posted a chart of the intrinsic jitter of different families. May be in one of the I/V threads. Sorry.....I can't help any more. I am old time ECL kind of guy. Took me a while to get comfortable with HC. Jocko

19th May 2004, 08:55 PM	#5
Christer diyAudio Member Join Date: Sep 2002 Location: Sweden	I agree with Jocko, if ECL is a possible choice, then have a look at it. I stopped working with digital design shortly after AS and ALS TTL appeared, ant they caused problems. Everybody is telling me that the newer CMOS families cause a lot more problems. But, of course, ECL is power-hungry and want some strange supply voltages.

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