DATAMATH CALCULATOR MUSEUM
|Date of introduction:||April 1983||Display technology:||LCD|
|New price:||Display size:||8 (5+2)|
|Size:|| 5.4" x 2.8" x 0.4"
138 x 71 x 10 mm3
|Weight:||3.9 ounces, 110 grams||Serial No:|
|Batteries:||2*LR44||Date of manufacture:||year 1986|
|AC-Adapter:||Origin of manufacture:||Japan|
|Precision:||9||Integrated circuits:||Toshiba T6823|
|Program steps:||Courtesy of:||Joerg Woerner|
This Canon F-44 followed the Canon card F-42 introduced in 1980 and replaced the sliding switches with normal keys.
The internal construction of the calculator
is similar to the LX-40 basic calculator introduced in
the same year and avoids any solder connection. Instead of using a traditional
printed circuit board (PCB) the F-44 uses a flexible foil pressed against a
heavy metal sheet.
Running Mike Sebastian's "Calculator forensics" gives an unacceptable bad result of 8.9789682 instead the expected value close to 9.0000. We know this result from a whole line of Toshiba calculator circuits introduced between 1977 (T3636 found in the Toshiba SLC-8300) and 1982 (T6825 found in the TI-30 SLR).
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, June 28, 2003. No reprints without written permission.