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
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.

horizontal rule

If you have additions to the above article please email:

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