DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-1795
|Date of introduction:||1985||Display technology:||LCD|
|New price:||Display size:||8|
|Size:|| 4.7" x 4.1" x
120 x 106 x 25 mm3
|Weight:||3.0 ounces, 86 grams||Serial No:|
|Batteries:||n.a.||Date of manufacture:||mth 10 year 1987 (A)|
|AC-Adapter:||Origin of manufacture:||Taiwan (C)|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download leaflet:||(US: 0.6 MByte)||Download manual:||(US: 2.0 MByte)|
Instruments added in 1986 a small bump on the key #5 of the
TI-1795 as a tactile guide to ensure that your fingers are in the home position. Everything else seems to be identical to its predecessor introduced two years earlier.
Dismantling this TI-1795 manufactured in October 1987 by Compal 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 SD9-15, most likely a reference to Type Small Desktop 9 and Revision 1.5 of the design (schematics and layout). We spotted this PCB-Mark already with the near identical offspring Radio Shack EC-2006A. An otherwise identical TI-1795 manufactured in January 1987 reads SD9-14 while a unit from July 1985 reads SD9-13. We 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.
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.
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© Joerg Woerner, March 16, 2020. No reprints without written permission.