• State Answer Suggested
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 18 subscribers
  • Views 1580 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Where to find datasheet for historical SN96912 ? Is there an equivalent ?

Frank Scherie
Prodigy 40 points

Hello,

I own a old  TI PC-100A Thermalprinter (used with TI-59/TI-58/SR-52 Pocket Calculators)  from the 1970s which uses three SN96912 to drive the thermal print head. Unfortunatly on circuit seems to be defective - i.e. one row does not work and interchanging two chips moves the column which indicates that its not a print head issue but circuit based issue.

As far as I know is SN96912  a sort of driver circuit

Unfortunatly there are no sources on the web which can provide a datasheet SN96912

Question:

1. Where to obtain datasheet of SN96912 (TI archive ??)

2. Is there a 1:1 replacement (pinout, circuit) for SN96912 ?

Help is really appreciated.

kind regards,
Frank Scherie

 

  • 0
    Prodigy 5 points
    Hello Frank, I cannot find the SN96912 in TI's archives.
    Nor a datasheet on the web.

    Our obsolete products site refers customers to our authorized distributor for obsolete products.
    www.ti.com/.../obsolete.htm
    Unfortunately SN96912 is not in that database either.

    I am afraid we won't be able to help here.
  • 0 in reply to Ed Walker
    Prodigy 40 points
    Hello Ed,

    thanks for quick response !

    Is it possible that this circuit is some sort of custom one - manufactured for the printers only ?

    PCB is shown here -

    www.datamath.org/.../JPEG_PC-100_PCB.htm

    the SN96912 is a DIP14 - not far away (up) from the white connector. As far as I know circuit operates at 12V DC. My guess the 12 in 96912 --> 12V

    I found circuit on a second device

    www.datamath.org/.../ti-5225.htm

    which includes a thermal printer, too

    background: We had 35 yrs ago in junior high programming course with TI-59 / PC-100A - before switching to TI-99/4A, which was my first computer. Still owning it and bought the TI-59/PC-100A on ebay years ago. Since this missing column is annoying I try to get a replacment for the circuit (there are two distributor with 865 and 2400 in stock) - but my hope was that I get information about circuit what is does and and what its pinout - instead unsoldering one circuit, place it on a breadboard and perform a nice session with my DSO and Multimeter.....

    Currently I'm working on a Y(R-Y)(B-Y) to RGB converter since European version of TI-99/4A uses this color model (different from US Models) - using TIna simulation tool - and sure - TN062 Op Amps from TI.

    kind regards
    Frank
  • 0 in reply to Frank Scherie
    Prodigy 5 points
    I have a 59 and a 58C in my desk. The card reader on the 59 was way ahead of its time.
    These calculators were powerful but also very power hungry, the batteries didn't last long.
    I used them in my engineering classes at Texas A&M, '86.

    The IC is very likely custom and made just for TI's calculators at the time.
    TI made many custom IC's for their products that were not available externally.
    And as things go, the device details were never input digitally.
    SN96912 material probably exists in a loose leaf binder.

    I bet you can find one of those calculators at a flea market and use it for parts.
    Good luck.