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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)
Precision:  8 Integrated circuits:  TMS0972
Memories:      
Program steps:   Courtesy of:  Joerg Woerner
    Download manuals:   (US: 1.3M Bytes)
  (EU: 3.5M Bytes)

Production of the TI-1200 was eventually brought to Hong Kong, probably to lower manufacturing costs during the Calculator Wars.

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.

Learn 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.

 

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If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, May 29, 2021. No reprints without written permission.