There are only a couple of 1-ns-class cmos Tiny Logic gates, an AND and a DFF. Everything else is slow. These SAV-551 Mini-Circuits ephmets are only about $1 each, and they can make crazy fast NAND and NOR gates. Rds-on is a few ohms and capacitances are small.
Output falling edges are faster than rising, but that suits my application.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
RTL rises again!
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
One is DTL, only backwards.
I used some RTL for a while, the Moto things in the round 8-pin glob-top TO5 sort of package. It was really bad, and not reliable.
Hey, I was just a kid.
It is interesting that some of the fastest logic elements are analog parts. Not just this case.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
John Larkin hasn't noticed that all digital logic runs with analog components. They are usually packaged up in a way that lets digital engineers ignore this.
One of my colleagues once observed that ECL didn't seem to deliver the advantage over TTL that the data sheets would lead you to expect.
I protested that it had always delivered for me, to which he responded that I was an analog engineer - which was true enough, since I could certainly manage fast and precise analog design - but rather implied that digital engineers couldn't.
-- Bill Sloman, Sydney
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