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Texas Instruments TI-1744

Date of introduction:  1982 Display technology:  LCD
New price:   Display size:  8
Size:  3.9" x 2.4" x 0.30"
 100 x 60 x 7.5 mm3
   
Weight:  1.7 ounces, 47 grams Serial No:  9525844
Batteries:  2*LR43 Date of manufacture:  
AC-Adapter:   Origin of manufacture:  Taiwan
Precision:  8 Integrated circuits:  NEC uPD1831G
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

In the year 1982 Texas Instruments had some difficulties to decide whether a calculator was a BASIC one or a SCIENTIFIC one. We know some pairs of similar calculators sold in both categories:

BASIC

SCIENTIFIC

TI-1020 TI-15
TI-1744 TI-18

TI-1744_PCB.jpg (37989 Byte)Similar confusion could be noticed with the Integrated Circuits used in these early calculators manufactured in Taiwan for Texas Instruments. Instead the usual Toshiba ICs you will discover in the TI-1020 a Sharp LI3009 and the calculating brain of this TI-1744 was developed by NEC (Japan). The uPD1831G single-chip calculator circuit is a stripped down variation of the uPD1833G located in Account Manager calculators like the National Semiconductor NS 103A or TI-2200.

Don't miss the Canon card F-32 Mathematic Calculator making use of the complete uPD1831G feature set.

 

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

Joerg Woerner, October 9, 2002. No reprints without written permission.