Canon card F-72

Date of introduction:  year 1980 Display technology:  LCD
New price:   Display size:  10 (8 + 2)
Size:  4.6" x 5.5" x 0.25"     
Weight:  4.4 ounces Serial No:  424088
Batteries:  CR2032 Date of manufacture:  year 1980
AC-Adapter:   Origin of manufacture:  Japan
Precision:   Integrated circuits:  Toshiba T3801S 
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The Canon card F-72 introduced in 1980 a remarkable powerful scientific/statistical calculator in a foldable housing.
It is the successor of the F-71 with similar functionality in a traditional housing.

F-72_1.jpg (94978 Byte)Dismantling the calculator took some time but revealed an interesting construction. In a first step the back shells of the housing could be removed and in a second step the electronics could be removed from the keyboard and display.

F-72_PCB.jpg (104186 Byte)The whole electronics of the F-72 is integrated in a Toshiba T3801S single-chip calculator circuit soldered on a huge flexible printed circuit board covering the whole calculator.

Don't miss the Canon card F-63 with the same specifications in a different package.

Texas Instruments introduced almost 10 years later with the SC-10 a similar approach but used a combination of rigid PCB's and flexible connections between.

With the F-73 we got the landscape housing back in the upper end of Canon's scientific/statistical calculator line. 

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Joerg Woerner, March 17, 2004. No reprints without written permission.