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| Looking for Datasheet for HP 1826-0570 Schmidt Amplifier |
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| Wrenches of Death:
Thanks in advance! WoD |
| Oldtestgear:
Cannot find this part# in any of the HP cross references that I have. All the similar part #s are for linear ICs. Sorry I cannot help. Phil |
| Uunoctium:
typed in your number at weisd.com and got NTE919 (eqivalent replacement for: 1826-0191, ECG919, LM319H, LM319K, NTE919, SK9217, SK9217/919) dual-high-speed comparator w. open collector TTL-compatible output 10 lead metal TO-can https://www.nteinc.com/specs/900to999/pdf/nte919.pdf |
| Wrenches of Death:
--- Quote from: Oldtestgear on June 02, 2022, 10:43:25 am ---Cannot find this part# in any of the HP cross references that I have. All the similar part #s are for linear ICs. --- End quote --- I checked all of the HP xref files I could find. I went through them page by page rather than take the chance that the pdf file search would miss them. Some of the scans are pretty rough. I also checked for an NSN to see if there were alternative part numbers, but no luck. It appears that it was an HP only part that wasn't a normal off the shelf item. I was hoping that it was an off the shelf item that was "selected". There's a lot of information available for Tektronix items like this, but not HP. :-[ I appreciate you checking though, many thanks! WoD |
| Wrenches of Death:
--- Quote from: Uunoctium on June 02, 2022, 12:14:38 pm ---typed in your number at weisd.com and got NTE919 (eqivalent replacement for: 1826-0191, ECG919, LM319H, LM319K, NTE919, SK9217, SK9217/919) dual-high-speed comparator w. open collector TTL-compatible output 10 lead metal TO-can --- End quote --- I hate to admit it, but it never occured to me to check ECG/NTE, thanks! I guess that I've slowed down as I gotten older. You've got me in the ball park now though! A pair of the 1826-0570 chips are used in the inputs of the HP 5335A counters and are pretty much non-existant in the spare parts department. The chips are fine in the pair of 5335A's that I have, but I wanted to head off possible problems in the future. I'd hate to have to scrap one somewhere down the line because of a two dollar IC that I can't find a replacement for. They are only 200Mhz counters. They max out somewhere around 270Mhz or so with 100uv input if I remember right. I can't help but wonder if the NTE919 would work in this application though. The datasheet lists a response time of only 80ns. Unless I'm missing something, that doesn't seem any where near fast enough handle triggering. thanks again, WoD |
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