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Texas Instruments TI-1795

Date of introduction:  1984 Display technology:  LCD
New price:   Display size:  8
Size:  4.7" x 4.1" x 1.0"
 120 x 106 x 25 mm3
   
Weight:  3.0 ounces, 86 grams Serial No:  
Batteries:  n.a. Date of manufacture:  mth 09 year 1984
AC-Adapter:   Origin of manufacture:  Taiwan (C)
Precision:  8 Integrated circuits:  
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
Download leaflet:   (US: 0.6M Bytes) Download manual:   (US: 2.0M Bytes)

Is it a small desktop calculator or a large handheld? From the designation "TI-1795" it is clearly categorized as a desktop product, from the size it could be a handheld like the TI-508.

Dismantling this TI-1795 manufactured in September 1984 by Cal-Comp Electronics, an OEM (Original Equipment Manufacturer) in Taiwan, reveals a clean design centered around an unknown Sharp single-chip calculator circuit soldered on a double-sided printed circuit board (PCB) and powered by solar cells.

Inspecting the PCB of this TI-1795 calculator brought our attention to a small mark reading SD9-13, most likely a reference to Type Small Desktop 9 and Revision 1.3 of the design (schematics and layout). We spotted this PCB-Mark already with the near identical offspring Radio Shack EC-2006A and started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments. Meet Kmart Corporation's KMC 100B - the first born SD9 calculator with Revision 10.

This TI-1795 introduced in 1984 started a line of everlasting calculators, compare it with the TI-1795+ and the TI-1795SV

Texas Instruments added in 1985 a small bump on key #5 of the TI-1795 and in 1988 the design of the TI-1795 was slightly changed before production was shifted to Thailand in 1991. 

The TI-1775 put similar specifications in a foldable housing while the TI-1796 added a battery backup and sports a 10 digits display.

OEM Design SD9 (Small Desktop 9)

This TI-1795 is obviously based on an OEM design shared with other manufacturers, find an overview of the known brands/models here:

KMC 100B KMC 7500C
Privileg SOLAR 31 Radio Shack EC-2006A
Royal DT 80 (1984) Royal DT 80 (1986)
Texas Instruments
TI-508
Texas Instruments
TI-508 PLUS
Texas Instruments
TI-1795
Texas Instruments
TI-1795+
Unisonic XL-1105 (1984) Unisonic XL-1105 (1986)
Unisonic XL-1110 (1984) Dixons Solar Desk

 



The TI-1795 is featured in the Texas Instruments Incorporated bulletin CL-854 dated 1985.

 

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

© Joerg Woerner, June 24, 2002. No reprints without written permission.