DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-1200 (Version 3, Hong Kong)
|Date of introduction:||1976||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:||0297877|
|Batteries:||9V||Date of manufacture:||wk 48 year 1976|
|AC-Adapter:||AC9180||Origin of manufacture:||Hong Kong (HK)|
|Program steps:||Courtesy of:||Joerg Woerner|
(US: 1.3M Bytes)
(EU: 3.5M Bytes)
of the TI-1200 was eventually brought to Hong
Kong, probably to lower manufacturing costs during the Calculator
Dismantling the featured TI-1200 with Date code 4876 HK and manufactured in November 1976 by Texas Instruments in Hong Kong reveals a very efficient and cost-optimized design with a single-sided printed circuit board (PCB) centered around a TMS0972 single-chip calculator circuit based on the TMS1000, the World's first Microcomputer.
The final step of cost reduction of the TI-1200/TI-1250 family was introduced just a few months before its discontinuation and included a smaller encapsulation of the TMS0972 Chip. While the original design was using a 0.6” wide 28-pin DIP (Plastic Dual In-line Package with a 0.1” / 2.54 mm lead pitch) encapsulation, switched the final design to a 0.4” wide 28-pin SPDIP (Shrink Plastic Dual In-line Package with a 0.07” / 1.778 mm lead pitch) encapsulation.
more about the
evolution of the TI-1200 between March 1975 and its discontinuation in 1977.
Learn more about the different Product Labels used with the TI-1200.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, May 29, 2021. No reprints without written permission.