Help Latch IC # 93L34PC in HP LCR Meter

• Help Latch IC # 93L34PC in HP LCR Meter
  Posted by sampler1 on 02 May, 2022 19:08
• Hi All,
  I have been looking around in Canada for some 93L34PC IC's but so far I am unable to find any. I have no idea how I could check this Logic IC . Could someone clue me in on testing this device. I have never tested a logic IC. lots of background in Electronics but this is a black hole.  I have the data sheet and Ill post the 1st page here.
  Sorry for the lame request.
  Thanks in advance.
  

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• #1 Reply
  Posted by factory on 02 May, 2022 19:23
• Looks like your in luck, the 54LS259 & 74LS259 are the TI equivalent to the 9334 93L34 and seem to be easier to obtain.
  
  David

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• #2 Reply
  Posted by sampler1 on 03 May, 2022 20:57
• Thanks so so much Dave !!
• #3 Reply
  Posted by sampler1 on 03 May, 2022 23:40
• David ,
   Just curious , how or maybe I should say where did you find the cross reference to that latch?
  Again Thanks
  Garry
• #4 Reply
  Posted by fzabkar on 03 May, 2022 23:52
• My IC Substitution Manual (1990) lists the following as substitutes for the 9334:
  
  National DM9334
  Signetics N9334, S9334
  
• #5 Reply
  Posted by factory on 04 May, 2022 18:52
• Quote from: sampler1 on 03 May, 2022 23:40

  David ,
   Just curious , how or maybe I should say where did you find the cross reference to that latch?
  Again Thanks
  Garry
  

  
  With a bit of web searching, link here https://datasheet.datasheetarchive.com/originals/scans/Scans-106/DSASCANS15-37816.pdf
  Edit: Bit more searching and found the same pages in the 1978 Fairchild TTL databook, pages 421 (74259) & 620 (9334) of this pdf; https://usermanual.wiki/Document/1978FairchildTTLDataBook.2136441351/view
  
  Searching for that again, I note Sphere in Canada have a Tek 156-0544-00 (aka 93L34), no idea how old it is though. https://www.sphere.bc.ca/test/tek-parts/tekparts4.html
  
  Out of interest, which HP LCR meter is this from?
  
  David
• #6 Reply
  Posted by sampler1 on 04 May, 2022 23:15
• The problem is;  HP 4261A LCR Meter.
  
  Someone removed a board full of logic chips and with a Hot Air gun and took all the chips out. He heated the board so much that in some places it is burned a bit. With a TL866 II programmer I found almost 90% of the logic Ic's no good. I figure it is from over temp. The guy who did this installed IC sockets all over the PCB , so at least one good thing. I am still waiting for 3 IC's  ( 93L34PC) and then I will be able to see if there is any other problems..
   well, back to the drawing board.
  Have a good one !