| Products > Test Equipment |
| Re: HP 4957A Protocol Analyzer - Option 001 High Speed Data Capture? |
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| gslick:
--- Quote from: petermesstorff on March 20, 2023, 12:30:49 am ---Hello ndemarco, I also picked up a HP 4957A Protocol Analyzer and would like to upgrade from A0001 to A0002 version. I would like to know which type of EPROMS you used and what programmer you can recommend (TL866-II)? Peter --- End quote --- If you want to buy current production parts from major suppliers (e.g. Mouser or Digi-Key) you are pretty much limited to Microchip AT27C010-45JU or AT27C010-70JU parts. Unfortunately they appear to be out of stock from all major suppliers, and from Microchip directly until around the end of 2023 or early 2024. If you don't want to wait that long, you don't have too many choices other than trying you luck buying AT27C010-70JC parts on eBay and hoping that they are legitimate parts that have never been programmed. OTP parts that have already been programmed are obviously just e-waste. I use a BP Microsystems BP-1610 myself for device programming (or a Data I/O UniSite for some ancient devices). I don't have any experience using a TL866-II. |
| aeg:
Future Electronics has SST39SF020A-70-4C-PHE in stock: https://www.futureelectronics.com/p/9872987 Edit: Oh, this is PLCC? Mouser and Digi-Key both have SST39SF020A-55-4C-NHE in stock. If pin 30 is floating then you would need to add a jumper wire. Arrow has a few SST39SF010A-55-4C-NHE in stock. I don't know if these are suitable for the 4957A. |
| gslick:
--- Quote from: aeg on March 21, 2023, 09:16:18 pm ---Future Electronics has SST39SF020A-70-4C-PHE in stock: https://www.futureelectronics.com/p/9872987 Edit: Oh, this is PLCC? Mouser and Digi-Key both have SST39SF020A-55-4C-NHE in stock. If pin 30 is floating then you would need to add a jumper wire. Arrow has a few SST39SF010A-55-4C-NHE in stock. I don't know if these are suitable for the 4957A. --- End quote --- It didn't occur to me to check for pin compatible Flash PLCC parts, I was only searching for OTP EPROM PLCC parts. Microchip Direct currently has over 1000 PLCC 1Mb 4.5-5.5V Parallel Flash SST39SF010A-70-4I-NHE-T parts in stock for around $2 each. I'd have to take a look at the original parts in my 4957A to check the speed rating. The 70ns SST39SF010A parts are probably fast enough. Oh, the SST39SF010A-70-4I-NHE-T parts are in tape packaging with a minimum order of 200 from Microchip Direct. Microchip Direct currently also has around a dozen SST39SF010A-55-4C-NHE tube packaging parts in stock with no minimum order (in addition to the SST39SF010A-55-4C-NHE parts you found in stock at Arrow). I should get around to fixing the power supply in my 4957A. Then I could try programming some SST39SF010A parts and swapping them in to verify that they work as replacements. |
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