DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-1250 (Version 4, Hong Kong)
|Date of introduction:||April 1977||Display technology:||LED-stick|
|New price:||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:||1037019|
|Batteries:||9V||Date of manufacture:||wk 25 year 1977|
|AC-Adapter:||AC9180||Origin of manufacture:||Hong Kong (HK)|
|Program steps:||Courtesy of:||Joerg Woerner|
(US: 2.5M Bytes)
(EU: 3.5M Bytes)
of the TI-1250 was eventually brought to Hong
Kong, probably to lower manufacturing costs during the Calculator
Dismantling this TI-1250 manufactured mid of 1977 in Hong Kong reveals the latest evolution of the TI-1200/TI-1250 family:
The TMS0972 single-chip calculator circuit in a 0.4” wide 28-pin SPDIP (Shrink Plastic Dual In-line Package with a 0.07” / 1.778 mm lead pitch) without any additional passive components soldered on a single-sided printed circuit board with an 8-digit LED display.
Learn more about the evolution of the TI-1250 between
June 1975 and its discontinuation in 1977.
Learn more about the different Product Labels used with the TI-1250 - here at the Datamath Calculator Museum we classify the featured TI-1200 as Hardware Version 4, PCB Type 3 and Product Label Style 4, A-Series.
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© Joerg Woerner, November 26, 2008. No reprints without written permission.