Texas Instruments TI-1797

Date of introduction:  1985 Display technology:  LCD
New price:   Display size:  8
Size:  5.9" x 3.7" x 0.30"
 150 x 94 x 8 mm3
Weight:  3.0 ounces, 84 grams Serial No:  
Batteries:  n.a. Date of manufacture:  mth 05 year 1986
AC-Adapter:   Origin of manufacture:  Taiwan (C)
Precision:  8 Integrated circuits:  
Memories:  1    
Program steps:   Courtesy of:  Ken Meine
Download leaflet:   (US: 1.2 MByte) Download manual:   (US: 2.0 MByte)

This stylish small desktop calculator is unique in Texas Instruments' line but matched the design line of the TI-1768. In Europe a similar calculator was sold with the TI-608.

Dismantling this TI-1797 manufactured in May 1986 by Cal-Comp Electronics in Taiwan reveals no surprises. A small single-chip calculator circuit probably manufactured by Sharp and a long flexible cable to the LC-display. Please notice that the mold of the housing is prepared for a battery instead of the solar cells..

Inspecting the PCB of this TI-1797 calculator brought our attention to a small mark reading SD3-11, most likely a reference to Type Small Desktop 3 and Revision 1.1 of the design (schematics and layout). We spotted a similar PCB-Mark already with the TI-1795 introduced in 1984 and started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.


The TI-1797 is featured in the Texas Instruments Incorporated bulletin CL-892 dated 1986.


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Joerg Woerner, April 13, 2009. No reprints without written permission.