Canon Palmtronic LD-80 (Panther D)
Brief History
Canon was the first japanese manufacturer who announced a pocket-sized calculator, the Pocketronic. From then, Canon developed a series of LED-display calculators with integrated circuits made by its american partner, Texas Instruments. But the japanese VFD tube technology was breaks into the market in 1974, and because of low prices, excellent electric characteristics and optical features, the manufacturers quickly replaced the LED displays with these domestic products. So Canon introduced the first VFD calculator, the LD-80 with Texas Instruments’ IC in 1974. But after Hitachi started mass production of LSI chips, Canon redesigned this model with Hitachi’s circuit. Later the higher capacity and more complex calculators were developed, first with Texas parts, and later with japanese versions.
| Manufacturer: | Canon Inc. (Japan) |
| Mfg. date: | 1974 |
| Size: | 8,9×14,4×3,3 cm |
| Weight (ready for operate): | n.a. |
| Type: | four-function |
| Capacity: | 8 digits (input/display) 8 digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | Hitachi HD3633 |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) |
| Features: | %calculation with percent Ffloating-point notation |
| Display: | 9 digit VFD (Futaba 9-ST-02A) |
| Power: | 4×AA-type battery 6V adaptor |
Second variation of the LD-80
Inside of the LD-80: the IC is under the display tube
Keyboard of the LD-80
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