ICC-82D Integrated Circuit Calculator V1

The ICC-82D (Integrated Circuit Calculator) is one of the first if not the first hand-held, battery powered calculators. It shows a display with 8 digits nixie tubes (V1), later with common amber gas-discharge tubes as V2. The Sanyo ICC-82D was launched in Japan for May 1970 and in the USA in September 1970 as Dictaphone version 1680. The probably first advertisement was in Nihon Keizai Shimbun 1970 April 30. Sharp (Hayakawa) was the leader at that time in this field with MOS-LSI technique (P-MOS multichip) with metal, thick-oxide nitride silicon LSI circuits. Main integrated circuits: Sanyo LM8001, LM8002, LM8003 and LM8004, clocked at 0.07 MHz. The later version uses LM8005 instead of LM8004. Precision = 16, no memory, calculation time about 0,4 seconds. Sep. adapter Sanyo CU-82E.

Power drain is only two watts - 1.2 watts for the two-phase logic circuits and 0.8 watts for the display and its drives. It has 13 different MOS arrays in its logic circuits, plus four transistors, eight resistors, and four capacitors in the clock circuits. But sold, it was redesigned for 4 or 5 LSI circuits, which at first were deliverd by General Instruments Micorelectronics of the USA. The five (most probably not four!) nickel-cadmium rechargeable "C" cells for 6 V - can run the calculator for three hours. But there was also the Sanyo 0081 Mini Calculator and competitors sold at about the same time such portable calculators, Canon Pocketronic and Sharp QT-8B.

The Sanyo ICC-82D is hand-holdable, but not a pocket calculator. It shows also a battery level meter.

The second design of the ICC-82D was introduced January 1971 at the same time as the ICC-0081 and used amber colored gas-discharge tubes with the common seven-segment layout. The main differences between the two calculators are the power supply. While the ICC-0081 features a built-in AC adaptor for the rechargeable batteries, the original ICC-82D uses an external AC adaptor.

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