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Texas Instruments TI-1775

Date of introduction:  1989 Display technology:  LCD
New price:   Display size:  8
Size:  5.9" x 4.8" x 0.35"    
Weight:  2.8 ounces Serial No:  
Batteries:  n.a. Date of manufacture:  mth 01 year 1992
AC-Adapter:   Origin of manufacture:  Malaysia
Precision:  8 Integrated circuits:  Toshiba T9731BU
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

TI-1775_B1.jpg (450476 Byte)Compared with the first version of the TI-1775 both the size of the display and solar cells was reduced to lower manufacturing costs. 

We couldn't resist to dismantle a TI-1775 calculator, please be aware that you have to use a kitchen knife ...
Removing the grey plastic sleeve reveals two surprisingly robust frames for the display and keyboard printed circuit boards (PCB's).

The upper half of the calculator holds not only the display and solar cells but even the Toshiba T9731BU single-chip calculator circuit.

Please notice that Canon sold with the LS-565H a similiar looking calculator manufactured in Malaysia, too. Probably both are OEM-products from the same company.

The next generation called TI-1775+ combined a smart housing with a clock.



The TI-1775 is featured in the Texas Instruments Incorporated sales catalog CL-1233 dated 1994.

 

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If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, September 20, 2002. No reprints without written permission.