DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-1750-II
|Date of introduction:||1980||Display technology:||LCD (yellow)|
|New price:||$17.50||Display size:||8|
4.4" x 2.6" x 0.30"
112 x 65 x 7 mm3
|Weight:||1.7 ounces, 49 grams||Serial No:||108334|
|Batteries:||2*LR54||Date of manufacture:||mth 07 year 1980|
|AC-Adapter:||Origin of manufacture:||Japan|
|Precision:||8||Integrated circuits:||Toshiba T3709|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download manual:||(US: 2.6M Bytes)|
could call this calculator the
small brother of the TI-1750. It uses a very similar
electronic in a slightly smaller housing than its predecessor. The calculator
was available till the year 1982.
Disassembling the featured TI-1750-II with Date code 070 and manufactured in July 1980 by Toshiba Corporation in Japan reveals a simple construction and a very clean layout centered around a Toshiba T3709 single-chip calculator circuit soldered on a single-sided printed circuit board (PCB) and powered by 2 small LR54 batteries. One of the tricks we noticed is a keyboard assembly with rubber keys instead the plastic molded keys of similar calculators. The Toshiba T3709 chip was used with the 3rd version of the TI-1750, too.
Inspecting the PCB of this TI-1750-II calculator brought our attention to a small mark reading TI-1750II TOSHIBA CORP. We started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.
Toshiba? Compare this calculator with the Toshiba LC-825.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.