Texas Instruments TI-30 SLR PLUS

Date of introduction:  1985 Display technology:  LCD
New price:   Display size:  8 (5 + 2)
Size:  5.4" x 2.7" x 0.4"    
Weight:  3.0 ounces Serial No:  152081
Batteries:  n.a. Date of manufacture:  mth 07 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: 6.2 MByte)

This rare TI-30 SLR PLUS brings immediately the famous TI-30 SLR in mind. Texas Instruments entered in 1982 the market of scientific LCD-calculators powered by solar cells with an almost perfect product developed and manufactured by Toshiba in Japan. The only drawback of the original TI-30 SLR was the limited calculating precision with only 9 digits instead of the 11 digits known from competing calculators.

TI-30SLR_PLUS_PCB2.jpg (100707 Byte)TI-30SLR_PLUS_PCB.jpg (69124 Byte)In 1984 Toshiba released with the T6974S a new calculator chip with much better algorithm sporting 11 digits of precision. We discovered the T6974S in the second edition of the TI-30 SLR, the TI-35 SOLAR, and this TI-30 SLR PLUS. All three calculators are identical and sport just minor differences in the keyboard labeling and the color of the case.

TI-30SLR_PLUS_IC.jpg (38765 Byte)In 1986 the overall appearance of the T6974S based scientific calculators was completely changed with the best selling TI-31, TI-31 SOLAR and TI-30 SLR+

TI-30SLR_PLUS_LAB.jpg (13198 Byte)Nevertheless manufactured Toshiba the TI-30 SLR PLUS mid of 1987 still in the old styling.


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Joerg Woerner, December 19, 2006. No reprints without written permission.