Author Topic: Datasheet search - M54HC123FL or M54HCL23FL?  (Read 1052 times)

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Offline Toczek13Topic starter

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Datasheet search - M54HC123FL or M54HCL23FL?
« on: February 12, 2021, 11:29:08 pm »
Hello,
I am looking for datasheet or any info about M54HC123FL/M54HCL23FL (I am not sure what is written on top ones or Ls) ic. I have extracted it from old spectrometer control rack and google wasn't helpfull at all. I would appriciate any help.
 

Offline Andy Watson

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Re: Datasheet search - M54HC123FL or M54HCL23FL?
« Reply #1 on: February 12, 2021, 11:58:03 pm »
Do you have any clue as to what the device does?
Long, long ago, the 74xx series of logic was available as 54xx, which was the military spec'd version. For example:
https://www.ti.com/product/SN74123
(download the datasheet)

Edit: Possibly, the "M" indicates it is an ST device. The 54 indicates it is one of their "rad hardened" devices. - so it's possibly a rad-hardened 74HC123. Note, pin-outs are usually different between 54 and 74 series.

https://www.st.com/resource/en/datasheet/m54hc123.pdf
« Last Edit: February 13, 2021, 12:17:10 am by Andy Watson »
 

Offline Toczek13Topic starter

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Re: Datasheet search - M54HC123FL or M54HCL23FL?
« Reply #2 on: February 13, 2021, 12:09:26 am »
It was close to bunch of 741NC op-amps and  DAC (8 and 10 bits), the brand name of M54... ic is SGS I think.

I made a photo of this IC.
 

Offline Andy Watson

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Re: Datasheet search - M54HC123FL or M54HCL23FL?
« Reply #3 on: February 13, 2021, 12:23:39 am »
You didn't mention the SGS :)
It's an ancient ST device from the days when they were known as SGS Thomson:
http://pdf.datasheetcatalog.com/datasheet/SGSThomsonMicroelectronics/mXvqrsx.pdf
 
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Offline Toczek13Topic starter

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Re: Datasheet search - M54HC123FL or M54HCL23FL?
« Reply #4 on: February 13, 2021, 12:28:44 am »
Thank you!
It's older than me  :D
 

Offline jmelson

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Re: Datasheet search - M54HC123FL or M54HCL23FL?
« Reply #5 on: February 13, 2021, 06:42:16 pm »
Hello,
I am looking for datasheet or any info about M54HC123FL/M54HCL23FL (I am not sure what is written on top ones or Ls) ic. I have extracted it from old spectrometer control rack and google wasn't helpfull at all. I would appriciate any help.
Your subject line has a typo.  The device is a military temperature grade dual one-shot, basically the 74HC123 in a ceramic glass-frit package.
Look at the 74HC123 datasheet for function and pinout.

Jon
 

Offline amyk

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Re: Datasheet search - M54HC123FL or M54HCL23FL?
« Reply #6 on: February 13, 2021, 11:13:23 pm »
Note, pin-outs are usually different between 54 and 74 series.
What?  AFAIK 54xx and 74xx have the same pinout but different temperature ranges.
 

Offline srb1954

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Re: Datasheet search - M54HC123FL or M54HCL23FL?
« Reply #7 on: February 14, 2021, 01:36:06 am »
Note, pin-outs are usually different between 54 and 74 series.
What?  AFAIK 54xx and 74xx have the same pinout but different temperature ranges.
The pin numbering is the same only for the DIP packages versions of the 54 and 74 series.

The 54 series was also available in a flat-pack package which typically had different pin numbering to the DIP packages.
 

Offline newbrain

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Re: Datasheet search - M54HC123FL or M54HCL23FL?
« Reply #8 on: February 14, 2021, 09:43:12 am »
You didn't mention the SGS :)
It's an ancient ST device from the days when they were known as SGS Thomson:
http://pdf.datasheetcatalog.com/datasheet/SGSThomsonMicroelectronics/mXvqrsx.pdf
Eh, you might be right or slightly wrong depending on the date codee on that IC!
Is it 1988 or 1986?
Given the logo, I would go with1986, and at that time it was just SGS, as in Società Generale Semiconduttori, even before the fusion with Thomson!
Nandemo wa shiranai wa yo, shitteru koto dake.
 


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