DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-1250
| Date of introduction: | June 1, 1975 | Display technology: | LED-stick |
| New price: | $24.95 | Display size: | 8 |
| Size: | 5.5" x 2.8" x 1.4" 138 x 70 x 35 mm3 |
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| Weight: | 3.9 ounces, 110 grams | Serial No: | 27669 |
| Batteries: | 9V | Date of manufacture: | wk 37 year 1975 |
| AC-Adapter: | AC9180 | Origin of manufacture: | USA |
| Precision: | 8 | Integrated circuits: | TMS0952 |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manual: | 
(US: 1.954 kB) |
Introduced
three month later than the TI-1200 the TI-1250 was the "fully loaded" design.
Basically both calculators were identical, most important was the higher sales
margin during the price wars due to the additional memory.
The later TI-1450 was nothing else than a cosmetically enhanced version of the TI-1250. Don't miss the colorful TI-1255 and the rare CONCEPT II.
Within one year the color of the display frame was changed from gold to silver, view the new design here. Production of the TI-1250 was eventaully shifted to Hong Kong, view one of them here.
The Dutch depoartment store HEMA sold an identical model as reactor 1250. A similar model was sold by Western Auto as the electronic Wizard M4987 and True Value Hardware with the model T-1225.
The basic calculator integrated circuit (IC) of this design was the TMS0952. With the TMS0972 manufacturing costs of the TI-1250 were lowered. Read more about the differences between the TMS0952 and TMS0972 here.
This chip was used by a lot of manufacturers, even National Semiconductor doing their one calculator chips used it. Explore the NS835A, Bohsei 3000, Conic EL-601 and Privileg 842M.
Don't miss the rare TI-1255!
Press the X-RAY
button and view the internals of a TI-1250.
(Pictures provided by Edward Soudentas)
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, January 4, 2002. No reprints without written permission.