DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-1795
| Date of introduction: | 1988 | Display technology: | LCD |
| New price: | $12.00 (SRP 1988) | 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 08 year 1988 |
| AC-Adapter: | Origin of manufacture: | Taiwan (C) | |
| Precision: | 8 | Integrated circuits: | |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manual: | 
(US: 2.0M Bytes) |
Just
a minor design variation to the original TI-1795
introduced four years earlier. And yes, the bump on key #5 introduced with the
TI-1795 in 1985 is still present.
Dismantling
this TI-1795 manufactured in August 1988 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 and started compiling a list
of the PCB-Marks on calculators
manufactured by OEMs for Texas Instruments.
In 1991 the size of the solar cells was reduced and production of the
TI-1795 was shifted to Thailand.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, March 4, 2011. No reprints without written permission.