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DATAMATH CALCULATOR MUSEUM

Sanyo ICC-0081 Mini Calculator

Date of introduction:	January 1971	Display technology:	Gas-discharge tubes
New price:	¥ 33,000, $ 425.00	Display size:	8
Size:	9.7" x 5.5" x 2.4" 246 x 140 x 60 mm³
Weight:	44.3 ounces, 1256 grams	Serial No:	T1144159
Batteries:	5N-1200SCL (6V 1200mAh)	Date of manufacture:	mth 02 year 1971
AC-Adapter:	120V or 220V	Origin of manufacture:	Japan
Precision:	16	Integrated circuits:	Sanyo LM8001, LM8002, LM8003, LM8005
Memories:
Program steps:		Courtesy of:	Joerg Woerner

Sanyo Electronics Company (Japan) entered the market of portable, electronic calculators already in May 1970 with the ICC-82D (Integrated Circuit Calculator). This "Mini Calculator" with rechargeable NiCd batteries lists in one line with:

• Canon Pocketronic
• Sharp QT-8D

The rather boxy ICC-0081, which looks with its carrying handle and cover very similar to Sanyo’s portable cassette tape recorders of the same era, hides its display under a small hood.

A large cover located between the display and the keyboard gives access to a sealed battery block with five rechargeable NiCd cells of 1.2V, each.

Dismantling this ICC-0081 manufactured in February 1971 reveals a clean and robust design based on four integrated circuits with SANYO LM8001, LM8002, LM8003, and LM8005 markings. These chips were manufactured under license of General Instruments Corp., together with Rockwell and Texas Instruments one of the pioneers in the development of LSI circuits (Large-Scale-Integration) in MOS technology.

The display of the featured calculator is composed of eight individual, amber colored gas-discharge tubes with the common seven-segment layout.

Within a few months engineers at Sanyo managed it to squeeze the four chip design of the ICC-82D / ICC-0081 into a package barely larger than the later Texas Instruments Datamath and introduced the incredible ICC-804D, a.k.a. Dictaphone 1681.

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