Can someone help me to identify this VISHAY IC? Tips on how to do this are also welcome :). I could not find anything by searching with the numbers on top of the IC. The IC is used in a MKS 649B Pressure Controller.
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1You need to consider it in context. What sort of connections does it have? What do you observe on it in operation. And why do you care? – Chris Stratton Aug 04 '20 at 12:54
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Been searching the internet top to toe for an answer too, I think the best I could come up with alongside the H bridge was this Vishay resistor network ic. The naming on the datasheet doesn’t line up at all so not convinced I’m correct, but just thought I’d share.
ezra_vdj
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2The PCB layout for the MKS649B is shown on page 39 of the manual: https://www.idealvac.com/files/manuals/MKS-649B-MAN.pdf This denotes the 24 pin IC as 'RN1' - so I suspect you are correct, it is a resistor network IC. Maybe something made as a 'special' with non-standard value resistors - hence no standard part number on the device – Yellow Yeti Aug 04 '20 at 12:57
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I cant comment as I don't have enough points, so I will submit this as an answer: closest I could find. It is an IC made by Vishay with the correct package (SOIC-24(W)) as far as I can guess. And I only found it by using different search terms with some terms between hyphens.
I guess this could be the correct IC, as the one I found is an H-bridge driver, so this one could be used to power the pump of the pressurizer.
JonathanG
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1Good shout, but not a SOIC24 package. SOIC packages are 1.27mm pitch - pin pitch on the IC shown is far too small. – Tom Carpenter Aug 04 '20 at 13:35