DATAMATH CALCULATOR MUSEUM
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|
|Program steps:||Courtesy of:||Joerg Woerner|
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%.
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.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, April 25, 2008. No reprints without written permission.