In particular I have a handfuls of 54HC574, M3-7611A-5 and WD8275-PL. I Could not find
datasheets for them by googling. I see them being sold on the internet but no site seems
to have the datasheets. Your help with determining what kind of chips these are, pin
designations and other data will be much appreciated.
Les
Check ti.com for 54hc574. If you just need pinout/function, is same as 74HC574
M3-7611A I dont know Maybe some kind of Haris op amp
WD8275 datasheet & application notes - Datasheet Archive
IIRC the 574 is just a 374.
http://www.nxp.com/documents/data_sheet/74HC_HCT574.pdf
The other two are listed on Octopart but I couldn't find any data sheets, have you tried the manufacturer's web sites?
Rob
374 and 574 have same function, but different pinout. OTOH, 54xxABCD should be just the mil spec version of 74xxABCD.
An 8275 in dip40 was a pretty famous CRT controller, and a 7611 in dip8 one of the early CMOS opamps. If those match your chip packages, you can find data sheets For intel 8275 and Intersil icl7611...
Thank you all for responding. I have located datasheets for all parts. Regarding M3-7611A
I could not get the Harris datasheet for 7611 (the IC's I have are I believe Harris product),
so I downloaded Intersil datasheet. Are these two products pin compatible?
Most probably very highly likely yes.