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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
Memories:
Program steps:		Courtesy of:	Joerg Woerner
		Download manual:	(US: 0.8M Bytes)

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:

• 1^st generation: The famous Datamath alias TI-2500
• 2^nd generation: The TI-1200 line
• 3^rd 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 Modern LCD-calculators outdated them due to their long battery life and thinner shape.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.

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.

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