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Texas Instruments TI-108

Date of introduction:  2000 Display technology:  LCD
New price:  $5.99 (SRP 2003)
 $7.00 (SRP 2013)
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 03 year 2000 (A)
AC-Adapter:   Origin of manufacture:  China (N)
Precision:  8 Integrated circuits:  Sharp LI3135MS
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The TI-108 was introduced already in 1986 and we are positive that the internal construction was changed from time to time. The featured calculator was manufactured in March 2000 by contract manufacturer Nam Tai Electronics, Inc. in China.

Dismantling this TI-108 reveals a typical design of a calculator developed in the 1990s. The single-chip calculator circuit is bonded directly to a high-quality printed circuit board (PCB) while the keyboard makes use of a much simpler Phenolic PCB.  We know a similiar design e.g. with the TI-15 Explorer.


As of June 2009 we identified a total of four different TI-108 versions:

Year Date code Comment Manufacturer
1986
(1st design)
C-0888 Based on TI-1706 II Compal Electronics, Inc.
Malaysia
1988
(2nd design)
I-0888

C-0191
Based on TI-1105 Inventec Corporation.
Taiwan
Compal Electronics, Inc.

Thailand
1992
(3rd design)
I-1194 smaller solar cells Inventec Corporation.
Malaysia
2000
(4th design)
N-0300 with backup battery Nam Tai Electronics, Inc.
China

 

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

Joerg Woerner, March 5, 2009. No reprints without written permission.