EEVblog Electronics Community Forum
General => General Technical Chat => Topic started by: metertech58761 on August 06, 2023, 04:31:19 am
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Is there any kind of a chart that lists the various Delco ICs and whether they are ASICs or relabeled commercial ICs?
I got my hands on an early GM engine control module that has the boards coated but not potted. I opened it up to see what it looked like inside, but every single semiconductor had a Delco P/N on it.
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The Philips ECG catalog listed some older delco semiconductors mostly diodes, transistors and some audio IC's.
I have never looked further than that myself although I have crossed a few Delco, Chrysler and Ford audio parts.
Jeff
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For car/truck ECU's the IC's are custom. It depends on the era, what year.
The MCU/TPU are usually slightly modified stock items. More memory, faster clock, added timers, added I/O ports kind of thing. If you rummage around the firmware you can figure it out.
Analog and power IC's are ASICs. Again, some are off the shelf with modifications.
GM's volumes allowed them to get Motorola, SGS etc. to make tailored parts.
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Probably "house numbered" parts made by one of the major semi mfgrs. May or may not be customized off the shelf. For sure they would likely have higher test specs compared to consumer grade.
1980s Ford ECU's tended to use customized Intel micros. I don't know who GM used.
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I was mainly curious as I was told the MCU in some stuff I continue to poke at was originally developed for these early GM ECMs.
Figures they would be numbered differently to keep these out of reach of well-meaning hobbyists with soldering irons. :)
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Several years ago I fiddled around with an early 90s Delco 808 ECU. This was my go-to forum at the time -> https://pcmhacking.net/forums/ (https://pcmhacking.net/forums/)