Talk:Logic family

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Definition: A group of compatible ICs with the same logic levels and supply voltages for performing various logic functions have been fabricated using a specific circuit configuration which is referred to as a logic family.

Types:

1. Bipolar Logic Families

 i) Saturated
   a) Resistor-Transistor Logic(RTL)
   b) Direct-Coupled transistor logic (DCTL)
   c) Integrated-injection logic (I2L)
   d) Diode-transistor logic (DTL)
   e) High-Threshold Logic(HTL)
   f) Transistor-Transistor logic (TTL)
 ii) Non-Saturated 
   a) Schotty TTL
   b) Emitter-Coupled logic (ECL)

2. Unipolar logic families

 i)   PMOS
 ii)  NMOS
 iii) CMOS               --Krishnavedala 08:10, May 15, 2005 (UTC)

This seems like a very old list of logic families. Perhaps there should also be discussion of:

1. Static Logic

 a) Pulsed Static CMOS
 b) Differential Cascode Voltage Switch (DCVS)
 c) Cascode Non-Threshold Logic (CNTL)
 d) Pass Gate/Transmission Gate Logic
 e) Complementary Pass Gate Logic (CPL)
 f) Push-Pull Logic
 g) Output Prediction Logic (OPL)

2. Dynamic Logic

 a) Domino
 b) Footless Domino
 c) NORA/Zipper Logic
 d) Multiple-Output Domino
 e) Compound Domino
 f) Dual-Rail Domino
 g) Self-Resetting Domino
 f) Sample-Set Differential Logic
 g) Limited Switch Dynamic Logic

Bisaksen 02:20, 24 February 2006 (UTC)

Yes, but there's two kinds of logic families here. One is available as packaged building-block circuits. The other kind are really families of design techniques used within integrated circuits. Your expertise is needed here - give us an outline! --Wtshymanski 00:51, 21 October 2006 (UTC)

[edit] non-CMOS families rarely used anymore

I agree with Bisaksen, this article is very out-of-date. CMOS has dominated the industry for the last 20 years but you can't tell that from this page. Digital design is 100% CMOS these-days, with Bipolar famiies only used for analog. TTL dip packaged logic is rarely found anymore in mass market electronics, only used in low volume stuff. Dyl 14:48, 6 August 2006 (UTC)

You know what to do. Write up this oberservation and put it in the summary page; though there's still a lot of TTL etc., being sold each year. A reference would be good - do you have an industry article that says no-one is really designing in the bipolar families any more? And mass market electronics is never representative of the state-of-the-art - if you found an article that says Agilent Technologies hasn't bought any TTL for years, that would be highly interesting and relevant. And provided this is properly noted, I think it's entirely appropriate that an encyclopedia article talk about all the historically important logic families, not just what's used today. After all, the article on Germany talks about a lot more than what happened in 2006 so far. --Wtshymanski 15:42, 6 August 2006 (UTC)

Well, if you look at any PC motherboard or crack open a cellphone, you'll see very little dip packages these days. These items are both mass market AND cutting-edge. Also, in the 1990s, mainframe computers switched to CMOS (away from bipolar ECL) due to lower cooling costs and increasing CMOS frequencies. No, I don't real numbers, but it's relatively obvious as the biggest semiconductor companies these days aren't making their money on dip packages. Yes, an unsubstantiated claim but I don't have the time to do the research. Dyl 16:54, 7 August 2006 (UTC)

I think the classification that I made was THE classification at that time. I accept that the classification is out of date. But as OLD IS GOLD, we just cant omit the previous work. Just put it in a HISTOR section? --Electron Kid 04:20, 21 October 2006 (UTC)