DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-2000
| Date of introduction: | 1974 | Display technology: | LED-stick |
| New price: | Display size: | 6 | |
| Size: | 5.1" x 2.9" x 1.3" 130 x 74 x 34 mm3 |
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| Weight: | 5.1 ounces, 144 grams | Serial No: | F04540 |
| Batteries: | 3*AA | Date of manufacture: | wk 25 year 1974 |
| AC-Adapter: | Origin of manufacture: | Italy | |
| Precision: | Integrated circuits: | TMS0135 | |
| Memories: | |||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manual: | 
(FR, GB: 1.0M Bytes) |
Okay,
you finally found the TI-2000 in the Exactra part of the Datamath Calculator
Museum. The label on the backside of the TI-2000 indicates with the bold
"Made in Italy" already that the TI-2000 was manufactured for the
European market.
Let's compare it with the
other Exactra models. First of all, the housing is
known from the Exactra 21, the color from the Exactra
20 and the missing Fix/Float switch from the Exactra
19.
Dismantling the TI-2000 manufactured in
June 1974 by Texas Instruments in Italy reveals a very clean
and simple design centered around the TMS0135 single-chip calculator circuit and
a tiny display driver. The remaining parts form a small power-converter to use
the 3 AA-sized batteries instead a 9V battery block.
But what kind of calculator is behind the TI-2000? None of
the Exactra line! The printed circuit board (PCB) of the calculator is identical to
the Exactra 20 but the missing Fix/Float switch is "hardwired".
Did you notice the "bubble lens" to magnify the small LED display? One of the most sought part of any Exactra calculator - don't miss the Star Wars: Episode IV - A New Hope (1977) story and learn more about the Exactra Calculator LED Displays
.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.