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Old 11th Jul 2018, 3:37 pm   #19
TonyDuell
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Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,190
Default Re: Tesla MH74S571 programming.

My experience with bipolar PROMs is that ICs from different manufacturers are totally compatible in _read_ mode but have totally different programming specifications (some of which were documented in the appropriate data sheets, some of which were not).

In other words if you are a manufacturer making a run of MK14s (or whatever), it doesn't matter which manufactuer's PROMs you get provided you can program them or get them programmed. They will all work the same in the final board.

The same seems to apply to bipolar PALs too. A 16L8 (say) from any manufacturer will work the same way in the final circuit if appropriately programmed. But the programming and verification methods are manufacturer-specific, you can't use the MMI ones for a National Semiconductor device (say)
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