DATAMATH  CALCULATOR  MUSEUM

Additional Pictures 

 

This Texas Instruments SR-22 was manufactured early in 1974.

The internal construction of the SR-22 makes use of two printed circuit boards (PCBs).
One PCB for the keyboard and a second one for the main electronics.

The  Main-PCB of the SR-22 with the TMS02XX/03XX/04XX chip-set
and some discrete driver electronics for the Panaplex II display.

Close-up view of the TMS0207, TMC0323, and TMC0404 integrated circuits.

The base selector LED's.

The power supply AC 9222 for the SR-22.

 
The sibblings SR-20 and SR-22 side by side.


horizontal rule

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

Joerg Woerner, May 5, 2002. No reprints without written permission.