DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Collecting calculators you'll sooner or later recognize different versions of the famous Texas Instruments Datamath calculator. Digging deeper into the mechanical and electronic engineering of that calculator we can define a total of 7 different US-built versions:
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TI-2500 Version 3 (Same as TI-2500-B) |
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Beside these 7 basic versions you can find small variations in labeling or country of origin.
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Most of the known Datamath models were sold under the "Longines Symphonette" brand, too. These one you can easily identify due to their green housing. Find a picture here.
Finally don't forget the white preseries of the Datamath and the LCD prototypes Minimath.
Datamath Comparision
| Type | Introduction | Colour, Label | Keyboard | Batteries | Battery Access | Charging time | Display | PCB | Circuits |
| TI-2500 First Series |
Jun.1972 | White, Molded | CE/D key | 6 NiCd soldered | 2 screws | 16h | 2 LED modules | 30356 | TMS0110 |
| TI-2500 Version 1 | Sep.1972 | Creme, Molded | CE/D key | 6 NiCd soldered | 2 screws | 16h | 2 LED modules | 30356 | TMS0119 |
| TI-2500 Version 2 | Feb.1973 | Creme, Molded | CE key | 4 NiCd soldered | no | 10h | 2 LED modules | 30319 30367 | TMS0119 |
| TI-2500 Version 3 | Aug.1973 | Creme, Sticker | CE key | 3 NiCd or 4 AA-cell | yes | 10h | 1 LED PCB | 30684 | TMS0119 |
| TI-2500B | Jan.1974 | Creme, Sticker | CE key | 3 NiCd or 4 AA-cell | yes | 10h | 1 LED PCB | 30684 | TMS0119 |
| TI-2500B Spain |
1974 | Creme, Sticker | CE key | 3 NiCd | yes | 10h | 1 LED PCB | 30684 | TMS0119 |
| TI-2510 (Version 3) |
Oct.1973 | Ivory, Sticker | CE key | 4 AA-cell | yes | n.a. | 1 LED PCB | 30614 | TMS0119 |
| TI-2510 (Version B) |
Jan.1974 | Ivory, Sticker | CE key | 4 AA-cell | yes | n.a. | 1 LED PCB | 30684 | TMS0119 |
| TI-2511 | 1974 | Creme, Sticker | CE key | 4 AA-cell | yes | n.a. | 1 LED PCB | 30684 | TMS0119 |
| TI-2500-II | Nov.1974 | Creme, Sticker | % key | 2 NiCd or 2 AA-cell | yes | 12h | 1 LED PCB | 101652 | TMS0803 |
Datamath™ is a trademark of Texas Instruments.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner December 22, 2000. No reprints without written permission.
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