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:||9.8" x 5.6" x 2.7"|
|Weight:||3 pounds 14 ounces||Serial No:||T1144159|
|Batteries:||5N-1200SCL (6V 1200mAh)||Date of manufacture:||mth 02 year 1971|
|AC-Adapter:||120V||Origin of manufacture:||Japan|
|Precision:||16||Integrated circuits:||Sanyo LM8001, LM8002, LM8003, LM8005|
|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:
• Sharp QT-8D
The rather boxy ICC-0081, which looks with its carrying handle and cover very similar to Sanyo’s transistor radios 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.
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© Joerg Woerner, October 9, 2002. No reprints without written permission.