DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-1795+ (1998 Nam Tai)
| Date of introduction: | 1998 | Display technology: | LCD |
| New price: | Display size: | 8 | |
| Size: | 5.1" x 4.2" x 1.0" 130 x 106 x 26 mm3 |
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| Weight: | 3.3 ounces, 94 grams | Serial No: | |
| Batteries: | n.a. | Date of manufacture: | mth 05 year 1998 |
| AC-Adapter: | Origin of manufacture: | China (N) | |
| Precision: | 8 | Integrated circuits: | |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woernerr |
At
first glance looks this TI-1795+ almost identical to the first design of the TI-1795+,
main differences are the slightly rounder design of the housing and a new layout
of the keys in the left column.
Dismantling this TI-1795+
manufactured in May 1998 by Nam Tai
Electronics in China reveals a clean design centered around an unknown
single-chip calculator circuit mounted in Chip-on-Board (COB) technology on a
small double-sided printed circuit board (PCB) and powered by small solar cells.
A larger, single-sided PCB is used for the keyboard and connected with a short
flat flexible cable (FFC). Please compare with a
TI-1795+ manufactured three month later by
Kinpo Electronics still using a
conventional Flat Pack (FP) housing and just one PCB.
Inspecting the PCBs of this TI-1795+ calculator brought our attention to
two small marks reading
TI-1795NP JP302-2 resp.
TI-1795NP JP307-2 while its stable mate
manufactured by Kinpo Electronics is marked with
SD29-11. We spotted a very similar PCB-Mark already with the Radio Shack EC-2006A
and Privileg SOLAR 31.
We started compiling a list of the PCB-Marks on calculators
manufactured by OEMs for Texas Instruments.
The Second
Generation of the TI-1795+ was introduced in January 1996 and
an interesting journey around the Globe began:
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TI-1795+ Second Generation Prototype
Kinpo Electronics (Taiwan),
June 1994 • TI-1795+ Second Generation Cal-Comp Electronics (Thailand), October 1995 and April 1998 • TI-1795+ Second Generation Nam Tai Electronics (China), May 1998 • TI-1795+ Second Generation Kinpo Electronics (China), August 1998 |
Within four years this TI-1795+ was replaced with the TI-1795SV (SuperViewTM). Compare it with the TI-1800 and the odd TI-808.
A similar calculator with 10 digits of display capability was sold with the TI-1796+.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, March 16, 2020. No reprints without written permission.