Texas Instruments TI-1000 (gold)

Date of introduction:  June 1977 Display technology:  LED-stick
New price:  $9.77, 6.95 Display size:  8
Size:  5.4" x 2.8" x 1.3"
 138 x 72 x 32 mm3
Weight:  3.0 ounces, 84 grams Serial No:  
Batteries:  9V  Date of manufacture:  wk 38 year 1977
AC-Adapter:  AC9180 Origin of manufacture:  USA (LTA)
Precision:  8 Integrated circuits:  TMC1991
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 0.8M Bytes)

TI-1000G_P1.jpg (275492 Byte)The stylish TI-1000 series was introduced 1977 together with the TI-1025 and TI-1050 as a cheaper alternative to the upcoming LCD-calculators. If someone counts generations on the early TI-calculators, this one is from the third generation:

1st generation: The famous Datamath alias TI-2500
2nd generation: The TI-1200 line
3rd generation: The TI-1000 line

Within one or two years after introduction of the TI-1000 the end of LED calculators was reached. Modern LCD-calculators outdated them due to their long battery life and thinner shape. Compare this LED calculator with the first TI LCD calculator, the TI-1750.

Dismantling this TI-1000 manufactured in September 1977 in Lubbock, TX reveals an internal design very similar to the TI-30 introduced in 1976. The main electronics of the calculator fits on a small printed circuit board (PCB), while the keyboard assembly and battery are connected with a few wires to the PCB.

This early TI-1000 is centered around a TMC1991 single-chip calculator circuit, a close relative to the TMC0970 used with the TI-1200 but highly optimized for cost savings of electronic calculators and educational products like the Little Professor.

TI-1000_gs.jpg (72952 Byte)Please note that later models of the TI-1000 feature a silver trim around the keyboard instead the earlier golden design. More - and surprising - differences could be found inside the two TI-1000 calculators.

Calculators with different nameplates were sold from Western Auto as Citation.

Don't miss the educational game "Spass mit Zahlen" based on the TI-1000.


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If you have additions to the above article please email:

Joerg Woerner, January 4, 2002. No reprints without written permission.