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Texas Instruments TI-1795SV

Date of introduction:  2000 Display technology:  LCD
New price:   Display size:  8
Size:  5.2" x 4.3" x 0.95"
 132 x 109 x 24 mm3
   
Weight:  3.3 ounces, 93 grams Serial No:  
Batteries:  LR54 (30A) Date of manufacture:  mth 03 year 2000 (A)
AC-Adapter:   Origin of manufacture:  China (N)
Precision:  8 Integrated circuits:  
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

This TI-1795SV looks great - you won't find any right angle in the design. Curious about the SV designation? It is the abbreviation of SuperViewTM which implies the perfect size and contrast of the LC-Display. Compare it with its predecessor TI-1795+ or the TI-508 PLUS.

Dismantling this TI-1795SV manufactured in March 2000 by Nam Tai Electronics in China and a second unit from June 2002 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 and a LR54 (LR1130) backup battery. A larger, single-sided PCB is used for the keyboard and connected with a short flat flexible cable (FFC).

Inspecting the PCBs of the two TI-1795SV calculators brought our attention to two small marks reading TI-1795SV VS302-1 resp. TI-1795SV VS307-1. We spotted a very similar pair of PCB-Marks already with a TI-1795+ manufactured by Nam Tai Electronics and reading TI-1795NP JP302-2 resp. TI-1795NP JP307-2. We started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.

An identical calculator was sold with the TI-7350SV while the almost identical TI-1796SV features a display with 10 digits capability. 

A similar shaped housing was used with the -1796 introduced in 2000, too.

In 2003 Texas Instruments introduced with the TI-503SV, TI-1706SV and TI-1795SV a new design style. These calculators were optimized in the wind tunnel for best aerodynamics. The TI-1795SV was in 2003 the only calculator that actually received even a technical improvement with its new tax functionality.

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

Joerg Woerner, February 3, 2002. No reprints without written permission.