DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-1626
| Date of introduction: | 1985 | Display technology: | LCD |
| New price: | Display size: | 8 | |
| Size: | 2.2" x 3.3" x 0.25" 57 x 84 x 6 mm3 |
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| Weight: | 0.8 ounces, 23 grams | Serial No: | |
| Batteries: | n.a. | Date of manufacture: | mth 07 year 1985 |
| AC-Adapter: | Origin of manufacture: | Taiwan (C) | |
| Precision: | 8 | Integrated circuits: | |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manual: | 
(US: 1.3M Bytes) |
The
TI-1626 could be called one of the smallest, thinnest and lightest calculators
manufactured by Texas Instruments. Compare it with the TI CARD calculator TI-1786
and the TI-1606 "Portrait-Style"
calculator.
Dismantling the featured TI-1626 - a non-reversible process -
manufactured in July 1985 by a non-disclosed
Original Equipment Manufacturer (OEM) in
Taiwan for Texas Instruments reveals a clean design centered around an unknown
single-chip calculator circuit soldered on a double-sided printed circuit board
(PCB) and powered by four small solar cells and surrounded by just a few
discrete components.
We noticed a rather unusual electrical connection between
the solar cells and the PCB with a flexible PCB.
Inspecting
the PCB of this TI-1626 calculator brought our attention to a small mark reading
S44T-11, together with the leading "C" in the
Date code of the calculator we assume that it
was manufactured
by
Cal-Comp
Electronics. We noticed a similar mark reading
S4T-10 already with the TI-1780
introduced in 1984 and started compiling a list of the
PCB-Marks on calculators manufactured by OEMs for Texas Instruments.
Within one year Texas Instruments introduced the TI-505,
a much more colorful calculator using an otherwise identical construction.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, May 13, 2003. No reprints without written permission.