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Author Topic: 21L02B SRAM  (Read 881 times)

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Offline Richard S

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21L02B SRAM
« on: July 10, 2022, 07:41:33 am »
I am looking for 21L02B SRAM or a suitable substitute.

There are some Signetics 21L02N-3 and Fairchild 21L02-1 online. Has anyone tried either of those in a Fortune I game?



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Offline Badbaud

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Re: 21L02B SRAM
« Reply #1 on: July 10, 2022, 11:13:42 am »
The dash after the 21L02 indicates the manufacturer.  As long as the chip has 2102 it will work.

I have used 2102AJ-2, 2102AL-4N, and 21L02B on the same board and they worked fine.
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Offline Richard S

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Re: 21L02B SRAM
« Reply #2 on: July 10, 2022, 12:57:53 pm »
Quote from: Badbaud on July 10, 2022, 11:13:42 am
The dash after the 21L02 indicates the manufacturer.  As long as the chip has 2102 it will work.

I have used 2102AJ-2, 2102AL-4N, and 21L02B on the same board and they worked fine.

Badbaud,

Thanks for the info on mixing the chips. I was concerned because, according the the Signetics datasheet, the 21L02, -1, -2, and -3 all have different speed characteristics, with the -3 having the fastest read, write, setup, and hold times. It is good to know that your experience shows that it doesn't matter in this application.

Richard
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