Texas Instruments TI-25 Solar

Date of introduction:  1992 Display technology:  LCD
New price:   Display size:  8 (5 + 2)
Size:  4.6" x 2.5" x 0.40"
 117 x 64 x 10 mm3
Weight:  1.8 ounces, 50 grams Serial No:  
Batteries:  n.a. Date of manufacture:  wk 39 year 1993
AC-Adapter:   Origin of manufacture:  Lubbock, USA (LTA)
Precision:  11 Integrated circuits:  Toshiba T6974
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The TI-25 SOLAR is a really unique scientific calculator with only the minimum amount of functions. It could be called the successor of the TI-30 Challenger.

We know the design of the TI-25 SOLAR from the US-built campaign started three years earlier with the TI-7000, TI-7100, TI-7200, TI-7300 and TI-7400 calculators. 
Even the colorful Fun Calc makes use of the same assembly technology.

The TI-25 SOLAR was soon replaced with the TI-25 STAT still assembled in USA and the TI-25X Solar manufactured in China. Both added some statistical functions to the TI-25 Solar. Don't miss a very colorful edition of the TI-25 SOLAR.

TI-25SOLAR_PCB.jpg (194436 Byte)The TI-25 SOLAR carries the "Made in USA" logo. If you read the small printed on the back of the calculator you'll notice the sentence "With foreign and domestic components". If you opened the calculator before reading, you would pronounce the word "foreign"!

An identical printed circuit board (PCB) was used with the TI-30S sold in Europe and assembled in China.

Don't miss the TI-8230 printing desktop calculator manufactured in the U.S.A., too.


The TI-25 Solar is featured in the Texas Instruments Incorporated sales catalog CL-1233 dated 1994.


horizontal rule

If you have additions to the above article please email:

Joerg Woerner, October 12, 2002. No reprints without written permission.