DATAMATH

DATAMATH CALCULATOR MUSEUM

Texas Instruments TI-108 (Addison-Wesley)

Date of introduction:	1988	Display technology:	LCD
New price:	($5.99 in 2003)	Display size:	8
Size:	4.3" x 2.5" x 0.40" 110 x 64 x 10 mm³
Weight:	1.5 ounces, 44 grams	Serial No:
Batteries:	n.a.	Date of manufacture:	mth 08 year 1988 (A)
AC-Adapter:		Origin of manufacture:	Taiwan (I)
Precision:	8	Integrated circuits:
Memories:	1
Program steps:		Courtesy of:	Joerg Woerner

The second generation TI-108 looks completely different to its predecessor, please focus on the position of the solar cells and the size of the display frame. Actually the calculator is around 0.2" (6 mm) smaller. We know a very similar calculator with the TI-1105.

Dismantling this TI-108 manufactured in August 1988 by Inventec Corporation in Taiwan for textbook publisher Addison-Wesley 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 solar cells.

Inspecting the PCB of this TI-108 calculator brought our attention to a small mark reading IOTI108E-01A, we noticed a similar mark already with the second generation of the TI-1105 introduced in 1988, too. We started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.

Starting in 1992 the TI-108 is using smaller solar cells but the design changes are barely noticeable. Please find a detailed overview of the different hardware versions of the TI-108 calculators between 1988 and 2016 here.

Stokes Publishing Company, Inc. based in Sunnyvale, California sold a companion for the teacher, view the Basic.

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