7400 series suffix question? RE - Page 1
Forum section: electronics / projects

author: SArepairman
author_rank: Frequent Contributor
timestamp: July 22, 2013, 08:56:19 pm
content: Is there a list somewhere of the different 7400 series suffixes?I have a chip that ends in N (Which I learned means DIP) that I am replacing a chip with RE.I assume that it will work, but I am curious what RE means.

author: Krzysztof Szymiczek
author_rank: Newbie
timestamp: July 23, 2013, 11:39:50 am
content: Not sure what are you on about, but maybe it helps a little:Bipolar 74 - the "standard TTL" logic family had no letters between the "74" and the specific part number.74L - Low power (compared to the original TTL logic family), very slowH - High speed (still produced but generally superseded by the S-series, used in 1970s era computers)S - Schottky (obsolete)LS - Low Power SchottkyAS - Advanced SchottkyALS - Advanced Low Power SchottkyF - Fast (faster than normal Schottky, similar to AS)CMOS C - CMOS 4–15 V operation similar to buffered 4000 (4000B) seriesHC - High speed CMOS, similar performance to LS, 12 nsHCT - High speed, compatible logic levels to bipolar partsAC - Advanced CMOS, performance generally between S and FAHC - Advanced High-Speed CMOS, three times as fast as HCALVC - Low voltage - 1.65 to 3.3 V, Time Propagation Delay (TPD) 2 nsAUC - Low voltage - 0.8 to 2.7 V, TPD < 1.9 ns@1.8 VFC - Fast CMOS, performance similar to FLCX - CMOS with 3 V supply and 5 V tolerant inputsLVC - Low voltage – 1.65 to 3.3 V and 5 V tolerant inputs, tpd < 5.5 ns@3.3 V, tpd < 9 ns@2.5 VLVQ - Low voltage - 3.3 VLVX - Low voltage - 3.3 V with 5 V tolerant inputsVHC - Very High Speed CMOS - 'S' performance in CMOS technology and powerBiCMOS BCT - BiCMOS, TTL-compatible input thresholds, used for buffersABT - Advanced BiCMOS, TTL-compatible input thresholds, faster than ACT and BCT

author: dfmischler
author_rank: Frequent Contributor
timestamp: July 23, 2013, 12:33:22 pm
content: He means that TI (and maybe other manufacturers) has switched to using an N in the suffix for PDIP parts. I believe this kind of stuff is generally manufacturer and family specific, although it might have been standardized when I wasn't paying attention. Several pages intothis pdf fileyou will see a list of complete part designations for TI 7408, 74S08, 74LS08...

author: hlavac
author_rank: Frequent Contributor
timestamp: July 23, 2013, 05:23:07 pm
content: Quote from: SArepairman on July 22, 2013, 08:56:19 pmUsually these mean different packages (N for DIP, D for SO...) and are specific to a manufacturer (unlike the series numbers themselves which are somewhat standardized from times where second sourcing was considered a good thing)

author: SeanB
author_rank: Super Contributor
timestamp: July 23, 2013, 06:14:04 pm
content: Some of the suffixes are also given when the part has a different pin out in the same package. That or there are different packages with the same number of pins but the pin layout is different. Older TTL was available in a N package ( plastic DIP), or in a P package ( ceramic DIP) or a PM3 package ( leaded chip carrier for surface mount) where the pinouts were different for each package, some have the power and ground pins in the middle of the package while others had the near standard package ends as power.

author: SharpEars
author_rank: Unknown
timestamp: October 21, 2017, 07:25:04 pm
content: Here are some common suffixes for older 74* parts from the 80s and 90s:AJ or J or JT is CDIPFK is LCCCN or NE is PDIPD or DW is SOICW is CFP