DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-52 Prototype (Japan)
| Date of introduction: | (1985) | Display technology: | LCD |
| New price: | Display size: | 10 + 2 | |
| Size: | 3.5" x 6.0" x 0.65" 88 x 153 x 17 mm3 |
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| Weight: | 3.7 ounces, 104 grams | Serial No: | |
| Batteries: | LR44 | Date of manufacture: | mth 04 year 1985 |
| AC-Adapter: | Origin of manufacture: | Japan (T) | |
| Precision: | 12 | Integrated circuits: | Toshiba T7767S |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manual, Addendum: |
(DE, FR: 11.8 MBytes)
(EU: 0.9 MBytes) |
Texas
Instruments introduced in 1984 with the TI-30 Galaxy
a calculator with pedagogical features in mind. It sports
large keys in a meaningful layout but uses only an 8-digit display and features
a rather disappointing calculating accuracy.
The TI-52 introduced in 1986 improved both disadvantages and could be called a perfect calculator.
This early prototype of the TI-52 uses the grey housing of the
TI-30 Galaxy and only parts of the keyboard has the final lettering.
Dismantling
this prototype of the TI-52 manufactured around April 1985 by Toshiba in Japan
exhibits an internal construction identical with the TI-30 Galaxy but using a
different single-chip calculator circuit.
The picture on the right gives a
close-up view of the Toshiba T7767S single-chip calculator circuit.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, June 27, 2018. No reprints without written permission.