Hi,
Can anyone help with a datasheet for this counter / 7 segment driver, please?
I've found a few in my stock, and it looks a useful chip for frequency display etc, but I can't find proper data or app notes on the Net.
I'd be happy to donate a couple of the chips in exchange for data🙂
Can anyone help with a datasheet for this counter / 7 segment driver, please?
I've found a few in my stock, and it looks a useful chip for frequency display etc, but I can't find proper data or app notes on the Net.
I'd be happy to donate a couple of the chips in exchange for data🙂
I'm thinking 😉 , what package are they, 18pin dip or near offer. Something vaguely familiar here. Or not ! Are they about 20year old ?
Remembered, I'm thinking of MM74C926 a 4 digit multiplexed driver and counter. Now 54 series TTL and 74 series again can't remember, not old enough 😀 😀 😀 . Was 54 military spec anyone. The C was low power CMOS version which leaves the 826 part of number. Is it a 74826 if any such thing.
24 pin 'wide' DIP. 20 years old is about right.
As far as I can gather, it's an up/down counter and 3x 7-segment driver. Apparently used in some amateur radio gear for frequency display.
Strangely, searching the 'net turns up a number of references to others seeking data. The only actual offer of a datasheet is from a subscription-based supplier. I've e-mailed SGS-Thompson, but had no reply so far.
Seems like a really handy device, but not much use without a pinout! I'm hoping that the displays can be latched, which would make it really easy to use!
As far as I can gather, it's an up/down counter and 3x 7-segment driver. Apparently used in some amateur radio gear for frequency display.
Strangely, searching the 'net turns up a number of references to others seeking data. The only actual offer of a datasheet is from a subscription-based supplier. I've e-mailed SGS-Thompson, but had no reply so far.
Seems like a really handy device, but not much use without a pinout! I'm hoping that the displays can be latched, which would make it really easy to use!
Worth a try, the part your after very similar 74926. Remembered bit more, Maplin used this in project for a digital rev counter, and like you say, the counters could be latched. This is what was so attractive about it.
Good luck anyway, Karl
Good luck anyway, Karl
Got any left?
I know your original post was a while back, but if you have any of these left, please shoot me a price. I have a couple of radio shack shortwaves that these drove the LED freq display that presently have no display.
I've looked for a data sheet also, cannot find one! The pinout is in the DX-300 & DX-302 service manuals, which are available for download on line (or I can more easily email you a copy).
Thanks!
Phil
KG4ERX
I know your original post was a while back, but if you have any of these left, please shoot me a price. I have a couple of radio shack shortwaves that these drove the LED freq display that presently have no display.
I've looked for a data sheet also, cannot find one! The pinout is in the DX-300 & DX-302 service manuals, which are available for download on line (or I can more easily email you a copy).
Thanks!
Phil
KG4ERX
ANyone still have copies of the old IC Master books on the shelf? Might it be in there? I found many an odd chip in there over the years.
Well now, I will have to check my D.A.T.A.B.O.O.K. I'm sure I can find it in one of those big books. I'll be scanning and posting this maybe this weekend. Isn't it amazing how s many parts components are not remembered/used anymore? There must be literally tens of thousands of oddball mixed-function and analog components like this (alot of them japanese) that you just never hear about until someone finds one in a TV or other device and wants a datasheet.
It boggles my mind.
Anyway I bet you if you do a pin resistance comparison between that IC and a.
Oh wait...
I found you a datasheet for an M5482. It is a display driver. it also has the suffix "B7". Could you have mistaken a "B" for a "6" (the writing might be scratched).
It boggles my mind.
Anyway I bet you if you do a pin resistance comparison between that IC and a.
Oh wait...
I found you a datasheet for an M5482. It is a display driver. it also has the suffix "B7". Could you have mistaken a "B" for a "6" (the writing might be scratched).
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