Texas Instruments TI-1776

Date of introduction:  1982 Display technology:  LCD
New price:   Display size:  8
Size:  3.7" x 2.2" x 0.25"
 95 x 56 x 6 mm
Weight:  1.2 ounces, 34 grams Serial No:  177119
Batteries:  n.a. Date of manufacture:  mth 12 year 1982
AC-Adapter:   Origin of manufacture:  Japan
Precision:  8 Integrated circuits:  Toshiba T6789S
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

TI-1776_Back.jpg (106812 Byte)At first glance seems the TI-1776 almost identical with the TI-1766, the first solar powered calculator introduced by Texas Instruments. The main difference is a much smaller and thinner housing, engineers of Toshiba, Japan shrank the calculator in all three dimensions by about 20%.

TI-1776_IC.jpg (159160 Byte)TI-1776_PCB.jpg (134199 Byte)Disassembling the featured TI-1776 manufactured in December 1982 by Toshiba in Japan reveals a smart construction and a very clean layout centered around a Toshiba T6789S single-chip calculator circuit soldered on a single-sided printed circuit board (PCB) and powered by 6 solar cells. One of the tricks we noticed is a keyboard assembly with rubber keys instead the plastic molded keys of similar calculators. The Toshiba T6789S chip was used with the 3rd version of the TI-1766 and the TI-1006, too.

Inspecting the PCB of this TI-1776 calculator brought our attention to a small mark reading TI-1776II TSB obviously for TI-1776 and ToShiBa. We started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.


The TI-1776 is featured in the Texas Instruments Incorporated leaflet CL-199M dated 1983.


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Joerg Woerner, April 25, 2008. No reprints without written permission.