Modern stand-in for an Intel 80C196KB? - Page 1
Forum section: electronics / general

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: January 22, 2021, 10:43:06 pm
content: Pretty much as the title says.I have an AN80C196KB that I need to replace a bunch of.This is the ROM-less version.

author: PCB.Wiz
author_rank: Super Contributor
timestamp: January 23, 2021, 02:06:36 am
content: Quote from: Rat_Patrol on January 22, 2021, 10:43:06 pm'replace' means what, exactly ?Do you expect to drop into the same physical footprint, or are you OK with redesigning the board ?Do you expect to simply use existing software, or is it in a portable language ?

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: January 25, 2021, 03:11:35 pm
content: Quote from: PCB.Wiz on January 23, 2021, 02:06:36 amPrefer drop in, but I could use an adapter.Needs to use the original software.

author: SiliconWizard
author_rank: Super Contributor
timestamp: January 25, 2021, 03:31:37 pm
content: Is it a safety-critical application?Your best bet at this point is to try one of the many brokers out there.Eg:https://www.jotrin.com/product/parts/AN80C196KBApparently, you can also find them on Aliexpress.But my first question means: how much can you trust the source.I'm not sure what you mean by "modern".According to Wikipedia, there are currently two companies still making MCS-96-compatible MCUs. One of them is russian, the other is Cobham (probably pretty expensive.)https://en.wikipedia.org/wiki/Intel_MCS-96

author: wraper
author_rank: Unknown
timestamp: January 25, 2021, 03:40:42 pm
content: Quote from: SiliconWizard on January 25, 2021, 03:31:37 pmIt's aerospace/military stuff. Costs something like $300+ a piece.https://niiet.ru/product-category/chips/microcont/mcs-96-16-bit/

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: January 25, 2021, 05:34:21 pm
content: Hoping to avoid the NOS/clone/defective offerings from the grey market.Also not wanting $300 eachEven if a board re-design is needed for a different footprint, I can do that. I just have to use the original software as I don't have access to the original source files, can only clone the existing external EPROMs (refurb job).

author: wraper
author_rank: Unknown
timestamp: January 25, 2021, 05:41:10 pm
content: Quote from: Rat_Patrol on January 25, 2021, 05:34:21 pmSuch thing does not exist. Either:1. use old stock which actually might turn out to be pulls from old equipment2. pay hundreds $ per piece for aerospace stuff3. rewrite the firmware and use modern MCU.

author: PCB.Wiz
author_rank: Super Contributor
timestamp: January 25, 2021, 06:58:11 pm
content: Quote from: Rat_Patrol on January 25, 2021, 03:11:35 pmAh, suspected as much.There are still AN80C196KB showing as 'available', so try those sources first.You could look at emulation via FPGA, but physical footprint match and 5V will be issues there, as well as the sheer time to debug the FPGA well enough.Have you disassembled the ROMs to see what peripherals the code actually uses ?What MHz is the 196 running at ?

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: January 25, 2021, 08:17:19 pm
content: Quote from: PCB.Wiz on January 25, 2021, 06:58:11 pmNo, I have not disassembled the ROMs. Software is not my forte.This example is running at 12MHz, internal