DATAMATH CALCULATOR MUSEUM
|
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) |
| Precision: | 8 | Integrated circuits: | TMS0972 |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manuals: | 
(US: 2.5M Bytes)
(EU: 3.5M Bytes) |
Production
of the TI-1250 was eventually brought to Hong
Kong, probably to lower manufacturing costs during the Calculator
Wars.
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.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, November 26, 2008. No reprints without written permission.