Texas Instruments TI-2500 / Datamath Version 3

Date of introduction:  August 1973 Display technology:  LED modules + lens
New price:   Display size:  8
Size:  5.5" x 3.0" x 1.7"
 139 x 76 x 42 mm3
Weight:  6.7 ounces, 191 grams Serial No:  2500024221
Batteries:  3*AA NiCd or 4*AA Alkaline Date of manufacture:  
AC-Adapter:  AC9130 or AC9120 Origin of manufacture:  USA
Precision:   Integrated circuits:  TMS0119
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 2.4M Bytes)

The third version of the different Datamath calculators could be easily recognized at the nice battery compartment on the bottom. This calculator uses either 3 rechargeable NiCd batteries or 4 alkaline cells instead the 4 built-in NiCd batteries behind the closed bottom of the Version 2.

A more detailed comparison between the ten known Datamath Versions could be found here.

In October 1973 with the TI-2510 a Datamath with absence of rechargeable batteries was introduced. 

TI-2500-V3_PCB.jpg (60906 Byte)The Version 3 of the Datamath was later renamed to TI-2500B. The only difference we discovered up to now is the changed display type. Don't miss the first prototypes of the TI-2500B.

Read more about Texas Instruments' "Calculator-on-a-Chip".

The last evolution step of the Datamath calculator was the odd TI-2500-II introduced more than two years after the original type.

Datamath™ is a trademark of Texas Instruments.

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© Joerg Woerner, December 5, 2001. No reprints without written permission.