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Wanted - Fairchild ul926 jk flip-flops
Wanted - Fairchild ul926 jk flip-flops
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Old 6th August 2020, 11:55 AM   #1
gcwills is offline gcwills  Australia
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Default Wanted - Fairchild ul926 jk flip-flops

Hi, I am seeking a couple of ancient Fairchild uL926 rtl jk flip-flops to repair a frequency counter. Hoping someone has some old stock or pulls from an old logic board?? Original part number is uL92629. Anyone?
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Old 6th August 2020, 10:29 PM   #2
johnnyk9 is offline johnnyk9  United States
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Let me look thru my stash and see if I ha e any...
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Old 6th August 2020, 10:40 PM   #3
rayma is offline rayma  United States
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UL92629 Fairchild Semiconductor - Distributors and Price Comparison | Octopart component search
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Old 7th August 2020, 03:27 AM   #4
simon7000 is offline simon7000  United States
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Package type?
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Old 7th August 2020, 04:16 AM   #5
gcwills is offline gcwills  Australia
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Hi Simon, there are two versions of this IC - a "glob top" epoxy round package or a squatter TO5 type package - either would be fine for me!

Last edited by gcwills; 7th August 2020 at 04:21 AM.
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Old 7th August 2020, 05:03 AM   #6
gcwills is offline gcwills  Australia
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EDIT: I have seen this IC from two manufacturers - Fairchild (p/n FuL92629) OR SGS (p/n 5992629P)
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Old 7th August 2020, 09:38 AM   #7
gcwills is offline gcwills  Australia
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A photo and datasheet of the uL926:

Click the image to open in full size.

Click the image to open in full size.

Last edited by gcwills; 7th August 2020 at 09:40 AM.
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Old 10th August 2020, 06:08 PM   #8
johnnyk9 is offline johnnyk9  United States
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I apologize for getting your hopes up but can not find any.
If I come across will send a pm.
Good luck
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Old 11th August 2020, 12:28 AM   #9
gcwills is offline gcwills  Australia
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Many thanks Johnny - I think I will need to look at substituting a modern CMOS flipflop for the 926.
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Old 11th August 2020, 02:47 AM   #10
simon7000 is offline simon7000  United States
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I am still looking, I know I had some years and years ago. I suspect the bad ones were in the front end and actually were higher speed than CMOS would be running at three volts.

There was also a flat pack version.
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