DATAMATH  CALCULATOR  MUSEUM

Additional Pictures 

 

Close-up view of the SN75491 Segment Driver Chip used with the Datamath and other calculators.
Bipolar Technology, 14-pin DIP, 4 * 50 mA Drivers.

Die Photo of the SN75491 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.