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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

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Old 27th Sep 2019, 7:39 pm   #1
govjohn
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Default RS Components IC code Nos.

Hi, does anyone have any old RS Components data sheets? As i am trying to identify some 18 pin DIL chips supplied by RS with their code No 303-422. According to the date code on them they date from 1985. RS themselves can't/wont help and I've drawn a blank with any other sorces. The members of this forum seem to collectivly hold a massive amount of information and you are my last chance.
Regards, John.
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Old 27th Sep 2019, 8:10 pm   #2
Cobaltblue
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Default Re: RS Components IC code Nos.

Hi Don't know if this is the same thing ?

https://in.rsdelivers.com/product/MN/MPN/SD/0303422

https://docs-emea.rs-online.com/webd...6b800a63b9.pdf

Right number of pins

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Old 27th Sep 2019, 9:00 pm   #3
elanman99
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Default Re: RS Components IC code Nos.

My memory might be playing tricks and I dont have any of my old diagrams or BoMs to hand but the RS number sound familiar to me as a 8 channel Darlington driver chip that are pretty ubiquitous even nowadays.
Ian

Mike beat me to it, but at least I know my memory is not too bad

Last edited by elanman99; 27th Sep 2019 at 9:02 pm. Reason: update
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Old 28th Sep 2019, 8:15 am   #4
Herald1360
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Default Re: RS Components IC code Nos.

ULN2800 series- weren't they originally Sprague parts? Certainly became ubiquitous, anyway.
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Old 28th Sep 2019, 10:45 am   #5
Trigon.
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Default Re: RS Components IC code Nos.

In a 1987 RS catalogue, the 303-422 is a Sprague ULN2803A, i.e. the 50V version with a 2k7 input resistor.

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Old 28th Sep 2019, 10:46 am   #6
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Default Re: RS Components IC code Nos.

Hi govjohn,I finally found my Nov 1991 RS cross reference list and it is shown as a 2803a which is as previously stated a Darlington array.Best regards,Peter.
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Old 28th Sep 2019, 5:39 pm   #7
govjohn
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Default Re: RS Components IC code Nos.

Thanks very much to all who replied.
Regards, John.
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