Logic Family characteristics

[Styx]

Does anyone have/know where it is on the net a complete table of what the different 74-series logic sub-family means and the benefits

ie

74HC = ????
74HCT = ????

I tend to use HC-logic since better noise imunity, but at work we also use HCT for a few places where faster stuff is needed.

Asking cause been lumbered with the jub of organising our stores and we have alot of different chip we didnt know we had.

 

[zevon8]

You have made me wonder the same thing, hmm ....

Here are some links:

Stanford University, reprint from Motorola
http://design.stanford.edu/spdl/ME218a/logic/which_is_best.html

Very interesting page, has a menu at the bottom you can scroll through to give basic characteristics of each type. Have a look around this site, great deal of info there, nice charts, etc showing speed and other comparisons.

http://www.interfacebus.com/voltage_threshold.html

I remember that Fairchild ( methinks ) used to do a chart in their master selection guide that let you pick family by requirement, not sure if they have it on line or not...

 

[samcheetah]

do you have the book "The Art of Electronics" ?????

there is a good discussion about the different types of digital ICs starting from page 484.

tell me if you dont have the book and ill try to scan the pages and upload it here.

 

[samcheetah]

never mind going through your pile of books. i have attatched a portion of the article which compares various logic IC families

 

[Styx]

Yup I have the Electronics bible.
We did use that but it really doesn't say what each type is

zevon8, perfect: This is what we were after:

Device Families:

TTL (74xx) True TTL
74L Low power
74S Schottky
74H High speed
74LS Low power - Schottky
74AS Advanced - Schottky
74ALS Advanced - Low power - Schottky
74F(AST) Fast - (Advanced - Schottky)
74C CMOS...................check Vcc levels
74HC (U) High speed - CMOS (Unbuffered output)
74HCT High speed - CMOS - TTL inputs
74AHC Advanced - High speed - CMOS
74AHCT Advanced - High speed - CMOS - TTL inputs
74FCT (-A) Fast - CMOS - TTL inputs (speed variations)
74FCT (-T, -AT) Fast - CMOS - TTL inputs (speed variations)
74AC Advanced - CMOS
74ACT Advanced - CMOS - TTL inputs
74FACT AC, ACT (Q) series
74ACQ Advanced - CMOS - Quiet outputs
74ACTQ Advanced - CMOS - TTL inputs - Quiet outputs

Bus Driver Families

74ABT Advanced - BiCMOS - Technology
74ABTE ABT - Enhanced Transceiver Logic
74ABTH Advanced - BiCMOS - Technology - bus Hold
74BCT BiCMOS - TTL inputs
74BTL Backplane - Transceiver - Logic
74GTL Gunning - Transceiver - Logic
74GTLP GTL Plus

Low Voltage Families

74ALB Advanced - Low Voltage - BiCMOS
74LV (U) Low - Voltage (Unbuffered output)
74LVC (R) (U) LV - CMOS (damping Resistor)(Unbuffered output)
74LVCH Low - Voltage - CMOS - bus Hold
74ALVC Advanced - Low - Voltage - CMOS
74LVT (R) (U) LV - TTL (damping Resistor(Unbuffered output)
74LVTZ Low - Voltage - TTL - High Impedance power-up
74ALVC (R) ALV - CMOS (bus Hold) (damping Resistor)
74ALVCH Advanced - Low - Voltage - CMOS - bus Hold
74LCX LV - CMOS (operates with 3v & 5v supplies)
74VCX LV - CMOS (operates with 1.8v & 3.6v supplies

4000 True CMOS (non-TTL levels)

ECL Device Families:

MEC I 8nS*
MEC II 2nS*
MEC III (16XX) 1nS* .......* = Rise & Fall Times
101xx 100 series 10K ECL, 3.5nS*
102xx 200 series 10K ECL, 2.5nS*
108xx 800 series 10K ECL, voltage compensated, 3.5nS*
10Hxxx 10K - High speed, voltage compensated, 1.8nS*
10Exxx 10K - ECLinPS, voltage compensated, 800pS*
100xxx 100K, temperature compensated
100Hxxx 100K - High speed, temperature compensated
100Exxx 100K - ECLinPS, temp, voltage comp., 800pS*

 

[checkmate]

This is the quick reference I always use.
http://www.cybermike.net/reference/74series.html