Texas Instruments TI-108

Date of introduction:  2004 Display technology:  LCD
New price:  ($5.99 in 2004)  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:  CR1220 Date of manufacture:  mth 04 year 2008 (E)
AC-Adapter:   Origin of manufacture:  China (S)
Precision:  8 Integrated circuits:  Sharp LI3154
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The fifth generation TI-108 looks looks at first glance very familiar to us and you have to read the small printed on the backside of the blue housing: 3V X 1  CR1220. Yes, finally a backup battery for the solar powered TI-108 introduced already in 1988!

Dismantling this TI-108 manufactured in August 2004 by Inventec Corporation in Shanghai (China) reveals a pretty simple internal construction.

Please notice the Sharp LI3154 single-chip calculator circuit in a traditional package - a technology rarely seen in the 21st century and discontinued with the redesign of the TI-108 in 2010.

Texas Instruments changed the design of the TI-108 again in 2014 and the internal backup was switched from a 3V Lithium battery to a more common (and more economical) Alkaline button cell with 1.5V.

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.


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If you have additions to the above article please email:

Joerg Woerner, December 27, 2017. No reprints without written permission.