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
|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|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download manual:||(EU: 3.5 MByte)|
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 eventually shifted to Hong Kong, view one of them here.
The Dutch department 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: firstname.lastname@example.org.
© Joerg Woerner, January 4, 2002. No reprints without written permission.