Texas Instruments TI-2500 / Datamath Version 1

Date of introduction:  September 21, 1972 Display technology:  LED modules
New price:  $119.95 Display size:  8
Size:  5.5" x 3.0" x 1.7"
 139 x 76 x 42 mm3
Weight:  11.4 ounces, 322 grams Serial No:  2500-90141
Batteries:  6*AA NiCd (internal) Date of manufacture:  year 1972
AC-Adapter:  AC9100 Origin of manufacture:  USA
Precision:   Integrated circuits:  TMS0119
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 2.4M Bytes)

The famous TI-2500 Datamath calculator was first announced in April 1972 with a suggested retail price (SRP) of $149.95. Beginning June 1972 first customers received in the Neiman-Marcus and Sanger-Harris department stores in Dallas, TX their calculators before the formally introduction on September 21, 1972. 

Don't miss the rare TI-2500 Datamath Version 1 First Series.

The SRP was reduced to $119.95 by the date of the formal introduction. Together with the TI-2500 Texas Instruments introduced the two desktop models TI-3000 and TI-3500. Find a reprint of the Press Release about the introduction here.

TI-2500-V1-Italy_PCB.jpg (71645 Byte)In a direct comparison with the later models in the Datamath line, this one uses 6 rechargeable NiCd batteries under the hood. You'll notice the CE/D-key on the upper left of the calculator, this key recalls the display. To reduce power consumption the electronics of this calculator will shut down most part of the display after few seconds of non use.

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

If you like to determine the age of your Datamath Version 1, follow this link. The long way of the pictured calculator from United States to Germany could be read here

TI-2500-V1-BOX.jpg (56604 Byte)Even the first version of the Datamath calculator was manufactured in Europe. Don't miss the TI-2500 Version 1 Italy.

A similar calculator to this TI-2500 Version 1 was sold under the label of Longines Symphonette. View it here.

This rare Version 1 calculator was replaced after 5 month with the Version 2.

Compare this design with the white Pre-Series Datamath and the Minimath prototype using an LCD display. 

If you are interested in the "Calculator-on-a-Chip" from Texas Instruments, the TMS0119 was used in another calculator. Don't miss the unique Heathkit IC-2108.

Don't miss the famous Bowmar 901B introduced already in September 1971 and based on mainly Texas Instruments components.

Read more about power consumption of electronic calculators here.

Datamath™ is a trademark of Texas Instruments.

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