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Additional Pictures 

 

This SR-51A (Version 2) was manufactured in April 1976 by
Texas Instruments in Lubbock, Texas (Date code LTA 1876 » wk 18 yr 1976).
The battery compartment of the SR-51A.

The Main printed circuit board (PCB) of the SR-51A calculator is centered around the
TMC0501 and TMC0532/0533 chips supported by only few discrete components.

The rear side of the SR-51A PCB with the Display Module and Keyboard assembly.
Close-up view of the TMC0501 Arithmetic Chip.

Close-up view of the TMC0532 Scanning and Read-Only Memory Chip.

Close-up view of the TMC0533 Scanning and Read-Only Memory Chip.

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


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

© Joerg Woerner, January 6, 2024. No reprints without written permission.