Drop in replacement for NEC D2732C?

[MrGPG]

Hi all

Looking for an EEPROM replacement for the above which is a OTP 4Kx8 rom used in my Acron Electron Plus One board.

Forgive the noob question.

Cheers
Glen

 

[KlausST]

Hi,

I did an internet search for you. Wasn't difficult.
The best solution seems to be a higher capacity ?-ROM or Flash and an according adapter.

Klaus

 

[ZASto]

There is no drop in replacement for 3732.
You can find 28C64 EEPROM or equivalent: https://eu.mouser.com/Semiconductors/Memory-ICs/EEPROM/_/N-488u2?P=1z0vhtuZ1yz08xe
or

https://uk.farnell.com/c/semiconductors-ics/memory/eeprom?memory-size=64kbit&memory-interface-type=parallel

Anyway, you will need to make an adapter board from DIP24 to DIP28

 

[betwixt]

Its an ancient device so I don't think you would find an electrically erasable version. That type isn't OTP though, it has a quartz window and can be erased with a UV light source.
If you need a reprogrammable replacement, try a 6264 static RAM. It is almost a pin-for-pin replacement and if you can give it a back-up power source (a CR2032 battery for example) it will retain data for several years. As with any RAM for ROM replacement you will have to provide it with a -WE signal to use it in a circuit.

Brian.
(ex - Risca!)