DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-31
| Date of introduction: | 1986 | Display technology: | LCD |
| New price: | Display size: | 8 (5 + 2) | |
| Size: | 5.5" x 2.8" x 0.45" 140 x 72 x 11 mm3 |
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| Weight: | 2.8 ounces, 78 grams | Serial No: | 591701 |
| Batteries: | n.a. | Date of manufacture: | mth 06 year 1987 |
| AC-Adapter: | Origin of manufacture: | Japan (T) | |
| Precision: | 11 | Integrated circuits: | Toshiba T6974S |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manual: | 
(US: 3.2M Bytes) |
At
first glance the TI-31 added just a few conversions and statistical functions to the TI-30
Challenger.
If you explore the calculator
closer, you'll discover the electronics of the earlier TI-30
SLR. Texas Instruments continued in 1986 the Toshiba-built
calculators with this TI-31 and the great BA-SOLAR.
Only few month after production of the TI-31 was launched in
Japan, a first redesign introduced both smaller solar cells and a new designation
TI-31 SOLAR.
In a next step the production of this design was shifted to China. The calculator kept the name plate TI-31 SOLAR and uses identical housing parts and printed circuit boards.
The later Italian version of the TI-31 SOLAR looks completely different. View the Italian TI-31 SOLAR and BA-SOLAR for a brief comparison.
The featured TI-31 seems to be identical to the later TI-30 SLR+ and the TI-35 SLR.
A less sophisticated calculator was introduced with the TI-30 SOLAR.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.