DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-1754
|Date of introduction:||1982||Display technology:||LCD|
|New price:||Display size:||8|
|Size:|| 2.2" x 3.9" x
56 x 97 x 5 mm3
|Weight:||1.5 ounces, 43 grams||Serial No:||7863326|
|Batteries:||2*LR54||Date of manufacture:|
|AC-Adapter:||Origin of manufacture:||Taiwan|
|Precision:||8||Integrated circuits:||Sharp LI3033MT|
|Program steps:||Courtesy of:||Stefan Klaes|
In 1981/1982 Texas Instruments introduced not only cheap looking calculators manufactured in Taiwan like the TI-1015 or TI-1006 but some very stylish and thin calculators.
The line covers the TI-1754 (credit card
sized), TI-1755 (golden trim), TI-1756 (silver edition of the
TI-1755) and TI-1757 (Music Card). All four models
got an audible instead of a tactile feedback of the entries.
Dismantling this TI-1754 manufactured in 1982 by a non-disclosed OEM (Original Equipment Manufacturer) in Taiwan reveals a clean design centered around a Sharp LI3033MT single-chip calculator circuit soldered on a double-sided printed circuit board (PCB) and powered by two LR54 (LR1130) batteries.
Inspecting the PCB of this TI-1754 calculator brought our attention to a small mark reading MK75, we spotted this PCB-Mark already with the near identical offspring Unisonic LC-7411G and suspect to locate it in the MBO Deluxe, too. Based on the PCB-Marks located with the TI-2130 and its twin Technico F-800 we are almost positive that the TI-1754 and its siblings were manufactured by Inventa Electronics Corporation of Taipei, Taiwan. We started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.
Later credit card sized calculators like the TI-1780 and TI-1786 show a much cheaper looking design.
Don't miss the Casio FIML CARD SL-800,
a real credit card sized calculator with a thickness of only 0.030".
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© Joerg Woerner, October 20, 2004. No reprints without written permission.