74(LS)196 - Looking for available functional replacement... - Page 1
Forum section: electronics / projects

author: Uky
author_rank: Regular Contributor
timestamp: October 26, 2024, 11:27:28 am
content: Forum,I am looking for a modern functional replacement for the obsolete 74LS196.This is a programmable/presettable BCD/Bi-Qunary or binary counter.It seems that many "basic" logic components, be LS/HC/HCT/ACT etc isbeing rapidly obsoleted / end of manufacture.A replacement does not have to be pin-compatible but at leastconfigurable when placed in a schematic drawing.Comments invited...

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 26, 2024, 11:32:14 am
content: It would not be so difficult to make with Renesas GreenPAK.If you are not mass producing, you can find them on ebay or at a parts store. Akihabara has them.

author: RoGeorge
author_rank: Super Contributor
timestamp: October 26, 2024, 11:36:23 am
content: Implement it in a PAL/CPLD/FPGA.If the working speed is not too high, emulate it with a microcontroller.

author: CaptDon
author_rank: Super Contributor
timestamp: October 26, 2024, 01:51:44 pm
content: Is this for a production run? You can easily find 74LS196 on the market places. I just checked my personal inventory and sorry I can't help you. I have 191, 192 and 195 in stock. Isn't there something down in the 7416X area like 74161 that is similar? I didn't dig up the data sheet, short on time today.

author: Uky
author_rank: Regular Contributor
timestamp: October 26, 2024, 02:18:54 pm
content: No need for any personal offers.I want to source what I can find on the market.It is not for a production run but for a low number new design.I have no intentions of using complex logiclike PAL, GreenPAK etc.It is for a programmable multi stage divider chain för precise timingrequirements. I want to solve the task using discrete logic.Will look further.

author: tooki
author_rank: Super Contributor
timestamp: October 26, 2024, 02:21:37 pm
content: Why not use a modern programmable clock chip? They’re literally made to do this type of thing.

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 26, 2024, 02:31:41 pm
content: Why can't you use GreenPAK? greenpak is not complicate.Download the software and you can simulate no need actual hardware.You can easily build a PLD just like a wiring diagram. No programming is required.Your remaining options are greenpak, ebay, and local component store.

author: edavid
author_rank: Super Contributor
timestamp: October 26, 2024, 03:14:55 pm
content: What is your speed requirement? Do you need to use the 2 sections separately?74HC192 and 74HC390 are still in production, and would cover most of the same applications.If you need something faster, there is 74AC160/74AC162.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: October 26, 2024, 04:59:29 pm
content: What about a 4000 series CMOS part? CD40192 ?https://www.ti.com/lit/ds/symlink/cd40192b.pdf

author: PCB.Wiz
author_rank: Super Contributor
timestamp: October 26, 2024, 08:29:02 pm
content: The 74?160/161/162/163 are the fast sync counter standards today.Many vendors do those, in high MHz.

author: Benta
author_rank: Super Contributor
timestamp: October 26, 2024, 09:08:21 pm
content: The 74ACT161 is the part you're looking for. Asynchronous load and reset.Ideal would be the 74ACT160 (BCD version), but no one produces BCD devices these days.