Canon F-31

Date of introduction:  year 1977 Display technology:  Fluorescent
New price:   Display size:  8
Size:  5.7" x 3.0" x 0.8"     
Weight:  4.2 ounces Serial No:  
Batteries:  2*AA Date of manufacture:  year 1977
AC-Adapter:   Origin of manufacture:  Japan
Precision:  8 Integrated circuits:  TMS1045 
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The Canon Palmtronic F-31 is another calculator based on the TMS1000 Microcomputer family. The TMS1045 found inside the F-31 is simlar to the calculator circuit of the TI-2550-III

Don't miss the Canola L813, Toshiba BC-8111B and BC-8112SL using the same brain without looking like a scientific calculator.

The next steps in the scientific calculator line were the Palmtronic F-41, F-51, and F-61.

The housing of the F-31 was used with the third series of the Palmtronic LD-10M, too.

If you have additions to the above article please email:

Joerg Woerner, December 5, 2001. No reprints without written permission.