Canon F-65

Date of introduction:  1984 Display technology:  LCD
New price:   Display size:  10 + 2
Size:  5.6" x 2.8" x 0.4"  
Weight:  3.6 ounces Serial No:  533234
Batteries:  2*LR1130 Date of manufacture:  year 1981
AC-Adapter:   Origin of manufacture:  Japan
Precision:  12  Integrated circuits:  Toshiba T7767S
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The Canon F-65 Scientific Statistical Calculator adds some features to its sibbling F-58 but sports the same housing and keyboard. 

F-65_IC.jpg (50691 Byte)F-65_1.jpg (86781 Byte)If we run the Calculator Forensics of the F-65 we discover the same 12-digit precision found on the TI-35 PLUS and TI-52. Dismantling the F-65 reveals indeed with the Toshiba T7767S single-chip calculator circuit a well known product.

F65_PCB.jpg (78611 Byte)The internal construction of the F-65, based on the LX-40 calculator, is very sophisticated. Just a small, one-sided printed circuit board (PCB) attached to the LC-display, batteries and the keyboard. The keyboard itself uses a sandwich of two conductive foils with an isolating spacer between them. The sheet metal supports the connections of the PCB to the LC-display and the keyboard. 

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Joerg Woerner, November 16, 2008. No reprints without written permission.