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
0.20" 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 |
Memories: | 1 | ||
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".
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, October 20, 2004. No reprints without written permission.