9000 series of IC"s?

[mwbarth36]

I have been trying to repair an HP54510A scope and have asked if anyone knows if a schematic exists in another thread.  Now I believe I have identified the defective component in this scope, the part number is PMI 9024 written on the 14 pin DIP I suspect.  I can find zero information about this IC.  There are other IC's in this series, a PMI 9025, Motorola 9029, and 9032, and some others used in this scope.  I simply cannot locate any information or data sheets for these devices.  Can anyone help?  This scope has at least three of the PMI 9024's on the circuit board.  Will appreciate any help I can get.

[greenpossum]

Sure some of those numbers aren't date codes?

[coromonadalix]

a service manual  without the schematics, mabe you can find some clues ??

You surely saw this manual ?


https://www.emctest.it/public/pages/strumentazione/elenco/Agilent%20-%20HP/54510A%20-%20Digitizing%20Oscilloscope/Manuali/Agilent-HP_54510%20-%20Service%20Manual.pdf

[LaserEng]

PMI would lead me to think they are IC's by Precision Monolithics, long since absorbed into Analog Devices. The number that you listed do look like date codes rather than device numbers though.

Perhaps posting pics of the chips will help us in identifying them.

[mwbarth36]

I also felt the 9000 type number might be code date, the full number on the chip is; the first line is PMI 9024, under that is the number 1826-1882.  This chip is a standard 14 pin DIP, nothing unusual about it other than the number.  Next to this chip is a 8 pin DIP with the marking PMI 9025, and no other numbers.  In the photos attached, you will notice that all (most) of the other IC's, even the standard SN74LS--- series has a 90-- number associated with it, as well as the 18-- numbers below.  Makes me believe that the 90-- and 18-- numbers are something done specifically for HP or a part number and a code date of some sort.  Would bet the PMI part is a standard IC of some sort, with the generic part number missing...............sure makes it difficult to identify without a schematic. Does anyone have any ideas?  Or am I at a dead end.

They are telling me file is too large, so can only post the one of the suspected bad PMI chip.  The 74LS... chips with additional numbers are TI, and some Motorola.

[Gyro]

Yes, those 90xx numbers are date codes (year,week number) and the other numbers are standard HP in-house part codes. Try the cross reference data on the Sphere site https://sphere.bc.ca/test/hpparts.html#cross  There are some other repositories on the web too.

They are telling me file is too large, so can only post the one of the suspected bad PMI chip.

Yep you need to resize your images down to something more appropriate to sufficient for the level of detail you're trying to show. Some forum members are on slow / mobile links. See attachment... your 2.8MB size -> 170kB.


P.S. To avoid overloading the Sphere site, do a web search for 'hp-xref-free.pdf' there are plenty of hits....   Your PMI 1826-1882 is an OP400GP and the PMI 1826-1992 is an OP200GP.

[greenpossum]

The 18s are HP in house numbers, I remember because I once repaired a chip in a HP calculator. The date codes happen be in 90.

[mwbarth36]

Want to thank you again for the answer to the part number.  I did get a replacement OP400, put it in, and the scope now operates just fine!  Thanks again for the answer.

[Gyro]

Good result!  Thanks for reporting back, I wish more did. 

[andy3055]

For future use for anyone, here is an HP Part number reference:

http://hparchive.com/Bench_Briefs/HP-Bench-Briefs-1990-07-12.pdf

The part in this thread is on page 33.

Courtesy of hparchive.com Does not seem to be affiliated with HP somehow.

[rsjsouza]

I echo Gyro's remarks; it is quite nice (and unusual) to see someone that asks a question and actually takes the time to reply with the outcome of the situation. You will the internet cookie today! 😁