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Sanyo ICC-82D Mini Calculator (1^st design)

Date of introduction:	1970	Display technology:	Nixie
New price:		Display size:	8
Size:	8.2" x 5.3" x 1.9"
Weight:	2 pounds 5 ounces	Serial No:	S1001255
Batteries:	internal 6V	Date of manufacture:	year 1970
AC-Adapter:	CU-82E, 220V	Origin of manufacture:	Japan
Precision:	16	Integrated circuits:	Sanyo LM8001, 8002, 8003, 8004
Memories:
Program steps:		Courtesy of:	Joerg Woerner

Sanyo Electronics Company (Japan) entered end of 1970 with the ICC-0081 (Integrated Circuit Calculator) the market of portable, electronic calculators. This later ICC-82D with rechargable NiCd batteries and an external AC-adapter lists in one line with:

	Busicom LE-120
	Canon Pocketronic
	Sharp QT-8D

The calculator brain uses 4 Sanyo chips manufactured under license of or by General Instruments Corp. clocked with 0.07MHz. One advantage of the chip-set is the internal capacity of 16 digits allowing e.g. the multiplication of two 14 digit numbers. Calculation time is about 0.4 seconds.

Do get an impression about the valuable internal construction just take your time and watch the next five pictures carefully.

This photo gives you an idea of the rather boxy design of the calculator.
The dismantled ICC-82D looks familiar with a display assembled of single tubes and a calculator brain using 4 Sanyo chips.
First surprise: The display of the first ICC-82D design uses discrete Nixie-style tubes, the second design the common 7-segment layout.
Second surprise: The calculator brain uses 4 Sanyo chips manufactured under license of or by General Instruments Corp. But one looks very different !

This rare Sanyo ICC-82D from the first production batch makes use of Nixie-tubes and the original design of the Sanyo chips LM8001, 8002, 8003 and 8004. The second - and common - version of the ICC-82D uses 7-segment style tubes and a new LM8005 chip.

On the US market the calculator was sold as Dictaphone 1680.

If you have additions to the above article please email: joerg@datamath.org.