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
|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|
|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.
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© Joerg Woerner, June 27, 2018. No reprints without written permission.