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Texas Instruments TI-1626

Date of introduction:  1985 Display technology:  LCD
New price:   Display size:  8
Size:  2.2" x 3.3" x 0.25"
 57 x 84 x 6 mm3
   
Weight:  0.8 ounces, 23 grams Serial No:  
Batteries:  n.a. Date of manufacture:  mth 07 year 1985
AC-Adapter:   Origin of manufacture:  Taiwan (C)
Precision:  8 Integrated circuits:  
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 1.3 MByte)

The TI-1626 could be called one of the smallest, thinnest and lightest calculators manufactured by Texas Instruments. Compare it with the TI CARD calculator TI-1786 and the TI-1606 "landscape-style" calculator.

Within one year Texas Instruments introduced the TI-505, a much more colorful calculator using an otherwise identical construction.

How do you design such a light calculator ?

This is an interesting question - the TI-1626 weights only 0.8 ounces.

The housing of the TI-1626 uses two thin plastic molded parts snapped easily together. We notice a standard printed circuit board (PCB) with some discrete components. The LC-display and the solar cells are connected with thin wires. TI-1626_PCB.jpg (41712 Byte)
Even the component side of the TI-1626 uses a standard calculator IC - nothing exiting. The keyboard assembly is a traditional design, too. But the 0.8 ounces?
Easy answer: Weight is proportional to size.
TI-1626_1.jpg (62130 Byte)

 

 

 



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

Joerg Woerner, May 13, 2003. No reprints without written permission.