DATAMATH CALCULATOR MUSEUM

Texas Instruments TI-1766 III

Date of introduction:	1990	Display technology:	LCD
New price:		Display size:	8
Size:	4.6" x 2.6" x 0.45" 117 x 65 x 11 mm³
Weight:	1.7 ounces, 48 grams	Serial No:
Batteries:	n.a.	Date of manufacture:	mth 05 year 1992
AC-Adapter:		Origin of manufacture:	Malaysia (I)
Precision:	8	Integrated circuits:
Memories:	1
Program steps:		Courtesy of:	Joerg Woerner

We wrote the year 1981 when Texas Instruments entered with the TI-1766 the market of LCD-calculators powered by solar cells. Within two years the cheap looking TI-1706 appeared and found its own way through the following decades, while the TI-1766 was always a synonym for the valuable design. And now - after the various TI-1766 II designs - a really disappointing TI-1766 III based on the TI-1706 III.

Disassembling the featured TI-1766 III manufactured in May 1992 by Inventec Corporation in Malaysia reveals a clean design centered around an unknown single-chip calculator circuit soldered on a double-sided printed circuit board (PCB) and powered by four small solar cells.

Inspecting the PCB of this TI-1766 III calculator brought our attention to a small mark reading IOTI1766IIIMB-01F and we started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.

The TI-1766 III was manufactured till 1996 before the TI-1766+ with a tiltable display was introduced. The TI-1775 put similar specifications in a foldable housing, while the TI-603D combined the grey housing with a novel "Day of the Week" feature.

The TI-1766 III is featured in the Texas Instruments Incorporated sales catalog CL-1233 dated 1994.

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