Looking for the datasheet / app notes for an *old* Texas Instruments telecom part:

<TI Logo>
TCM1705AN
8419 date code
ENGLAND

16-pin plastic DIP

Thanks.

ak

 

hi,
Is this any help.?
E
https://www.alldatasheet.com/datasheet-pdf/pdf/116937/TI/TCM1705A.html

 

That's the one. When I went surfing, that didn't come up.

And, I've got over 20 of them. If you know anyone who needs a few . . .

Tang Yew Berry Mulch.

ak

 

That’s actually a pretty cool IC. The telephone hybrid was an amazing feat of engineering, overall. Not just the theory but the amazing, bullet-proof implementation by Western Electric. I miss POTS and the PSTN. I hate seeing the last mile hanging from poles and cut off. It used to be so rigproudly maintained. The current user terminations for cable are such a terrible mess.

It might be weird, but it makes me sad.

 

Me, too. I have two land lines (gotta have a backup). I use one of them every time the cable goes out.

The hybrid is one of my favorite circuits to play with; my file on the hybrid is over an inch thick. I did a google patents dive back to the 1920's. Those boys were smart.

ak