Electronics > Repair

Identify integrated circuits SN49730N, SN49829N, SN49840N

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Greybeard:
Can anybody identify these integrated circuits, please?

Harry_22:
Hi!

SN49829N = FLH255

aeg:
Wow! I never heard of SN49 series. Maybe it was only marketed in Germany?

It was covered in a databook, so it's a standard series, not house-numbered parts: https://www.antikvarium.hu/konyv/pocket-guide-901729-0

There is some information on a Russian website: http://www.155la3.ru/sn49xxx.htm

According to the site, SN498xx is the extended-temperature version of SN49xx.

Rainer Knaepper posted some scans from the 1979 databook: http://web.archive.org/web/20080620204134/http://www.smial.prima.de/elektronisches.html

Unfortunately, nothing about SN49730N or SN49840N.

Greybeard:

--- Quote from: aeg on January 15, 2025, 01:03:19 am ---Wow! I never heard of SN49 series. Maybe it was only marketed in Germany?

--- End quote ---
I don't think so, because manufacturer is TI.
Siemens TTL are marked FLH, FLJ, FLK, FZH, FZJ...

fzabkar:
https://www.synfo.nl/datasheets/SIEMENS_1976-1977_%20ANALOG-INTEGRATED-CIRCUITS.pdf

    4930 = FLH321 = quadruple 2-input NAND-powergate

From the .ru site (thanks @aeg), 49730 and 49830 are different temperature grades of the 4930.

https://web.archive.org/web/20041227065139/http://www.smial.prima.de/download/sn49xxx/sn4930.gif

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