Additional Pictures 


This SR-50 (Version 1) was manufactured in May 1974 by
Texas Instruments in Dallas, TX (Date code 214 wk 21 yr 1974).

The battery compartment of the SR-50.

The Main printed circuit board (PCB) of the SR-50 calculator is centered around the
TMC0501 and TMC0521 chips supported by many discrete components.

The Display and Keyboard PCB of the SR-50 with two Texas Instruments
SN27882 display drivers and fourteen individual 7-segment LED-Displays. 

Close-up view of the TMC0501 Arithmetic Chip.

Close-up view of the TMC0521 Scanning and Read-Only Memory Chip.

Close-up view of the 14-digit LED Display with magnifying lens.

Close-up view of one of the two SN27882 Display Driver Chips.

horizontal rule

If you have additions to the above article please email:

Joerg Woerner, August 25, 2023. No reprints without written permission.