Help identifying this IC - Page 1
Forum section: electronics / beginners

author: giosif
author_rank: Frequent Contributor
timestamp: July 26, 2015, 09:44:51 am
content: Hello,Can someone please help me identify the IC in the attached picture (i.e. brand, model)?The logo seems to indicate it's a Motorola, but I could not find any such product with that model number.Thanks,George

author: tautech
author_rank: Super Contributor
timestamp: July 26, 2015, 10:25:18 am
content: The type of equipment it's in might help us.Also a Service manual for it may have the part listing and device type.

author: Psi
author_rank: Super Contributor
timestamp: July 26, 2015, 10:44:44 am
content: Its almost certainly a 8050 cpu of some sort.Says 8050 on it and those did come in 40pin dip packages.It also looks old enough.

author: SeanB
author_rank: Super Contributor
timestamp: July 26, 2015, 11:26:43 am
content: Mask ROM version of the 6800 family, easy to see from the Motorola logo, the mask version number, ZC probably a customer number, the 0002 the mask number so either the second version after the first 10k units did not work or they did a firmware upgrade on the system, and the P indicating a plastic package. Could also be the OTP Eprom version of the 6800 processor, which was often done for low volume customers who would order 1000 at a time.The 8050 is a date code, week 50 of 1980, reinforced by the support TTL being dated 1979 to 1981.IC6 and IC7 were probably there for ROM chips used during the development cycle, so the 6800 is a version with 2k of ROM on die, and probably 128 bytes of RAM as well.Probably a MC6802 or 6808, depending on what is connected.http://www.andysarcade.de/data/electronics/components/6802_6808.pdfIf no rom chips, it is a MC6801. Most likely candidate for sure if there is no ROM or RAM on the board, it has a whole 2k of ROM ( you can fly to the Moon on 2k) and 128 bits of RAM.http://www.andysarcade.de/data/electronics/components/6801_6803.pdf

author: giosif
author_rank: Frequent Contributor
timestamp: July 26, 2015, 12:04:39 pm
content: Thanks everyone for your answers!Quote from: tautech on July 26, 2015, 10:25:18 amThe equipment is a bench multimeter (Solartron 7060).This is on the processor board.Service manual... eh... if only I could find one (have been searching one for months)...Quote from: Psi on July 26, 2015, 10:44:44 amAmm... I think that's a date code (SeanB has just confirmed it).Quote from: SeanB on July 26, 2015, 11:26:43 amI think you are on to something here: a quick check and it seems the pinout matches the one on the MC6802/8.IC7 is an SRAM and IC8 (not IC6, the number is not that readable in the picture) is an EPROM.Now, there is also an IC6, but that's not visible in the picture and it is an MC68488 (from what I could gather, that's for the GPIB interface).Many thanks again,George

author: miguelvp
author_rank: Super Contributor
timestamp: July 26, 2015, 06:07:41 pm
content: Maybe this thread helpshttps://www.eevblog.com/forum/reviews/solartron-7061-help-and-come-photos/It has links to service manuals that might be close enough to yours.

author: giosif
author_rank: Frequent Contributor
timestamp: July 26, 2015, 06:18:43 pm
content: Quote from: miguelvp on July 26, 2015, 06:07:41 pmThanks for the info!I was aware of that thread already.However, even if there's only one unit difference in model numbers, the devices are (to me) very different.Thanks anyway,George

author: woodchips
author_rank: Frequent Contributor
timestamp: July 26, 2015, 07:46:45 pm
content: Manualsplus.com have a 7060 service manual, buy it quick before they close.

author: giosif
author_rank: Frequent Contributor
timestamp: July 26, 2015, 08:19:21 pm
content: Quote from: woodchips on July 26, 2015, 07:46:45 pmWow, they actually have the service manual for it!But, alas, it doesn't come cheap and, being a site in the US, I expect there will also be a shipping cost.But, at least I know where to go next time I hit the jackpot.Thanks woodchips!Regards,George

author: giosif
author_rank: Frequent Contributor
timestamp: August 04, 2016, 05:20:07 pm
content: Old topic, but I thought I'd add the information here, for any future owners of faulty Solartron 7060 voltmeters: basically, SeanB was right on the money with the suggestion that this chip might be a Motorola MC6802 - the actual model is MC68A02P.After such a long time, I was finally able to identify the fault with my 7060 - the CPU MC68A02P has died.

author: CJay
author_rank: Super Contributor
timestamp: August 04, 2016, 05:26:55 pm
content: Quote from: giosif on August 04, 2016, 05:20:07 pmAlso worth adding as a general note, Motorola parts with a ZC partnumer are usually customer numbered.Did you find a CPU?