DATAMATH  CALCULATOR  MUSEUM

Additional Pictures 

 

Close-up view of the SN75492 Digit Driver Chip used with the Datamath and other calculators.
Bipolar Technology, 14-pin DIP, 6 * 250 mA Drivers.

Die Photo of the SN75492 courtesy of Sean Riddle.

Close-up view of the SN96912 Digit Driver Chip used with the PC-100, PC-100A and TI-5230.
Bipolar Technology, 14-pin DIP, 6 * 250 mA Drivers.



Die Photo of the SN96912 courtesy of Sean Riddle.

Die Photo (after acid) of the SN96912 courtesy of Sean Riddle.

Close-up view of the SN99253 Digit Driver Chip used with the Regency Radio Scanner ACT-T16K.
Bipolar Technology, 14-pin DIP, 6 * 250 mA Drivers.



Die Photo of the SN99253 courtesy of Sean Riddle.

Die Photo (after acid) of the SN99253 courtesy of Sean Riddle.


If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, July 11, 2021. No reprints without written permission.