Texas Instruments TI-1450

Date of introduction:  1976 Display technology:  LED-stick
New price:  $16.00  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:  B 0200218
Batteries:  9V  Date of manufacture:  wk 48 year 1976
AC-Adapter:  AC9180 Origin of manufacture:  USA (LTA)
Precision:   Integrated circuits:  TMS0972
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The TI-1450 differed slightly from the TI-1250 introduced roughly one year earlier. The brown housing together with the more valuable keyplate design made this calculator desirable for the manager desk.

Under the hood the TI-1450 is identical with the TI-1250, the unusual [CS] key was renamed to [+/-]. Don't miss the similar TI-1400.

Dismantling the featured TI-1450 with Date code 4876 LTA and manufactured in December 1976 in Lubbock, Texas 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-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-1450 as Hardware Version 3, PCB Type 2 and Product Label Style 4, B-Series.

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If you have additions to the above article please email:

Joerg Woerner, December 5, 2001. No reprints without written permission.