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Texas Instruments TI-57 II

Date of introduction:  1985 Display technology:  LCD
New price:   Display size:  8 + 2
Size:  5.8" x 2.8" x 0.85"
 147 x 72 x 22 mm3
   
Weight:  3.0 ounces, 84 grams Serial No:  0012119
Batteries:  2*LR44 Date of manufacture:  mth 11 year 1984
AC-Adapter:   Origin of manufacture:  Taiwan
Precision:  11 Integrated circuits:  CD4555, CD4572
Memories:  1-7    
Program steps:  48-0 Courtesy of:  Stefan Klaes
    Download manual:   (IT: 10.6 MByte)
  (GB: 9.6 MByte)

If you read the technical comments on the TI-55 III you know the reason why Texas Instruments introduced 1985 the TI-57 II.

TI-57II_2_PCB.jpg (77116 Byte)From the technical point of view the calculators are similar, both use identical displays and integrated circuits. The main difference is the quality of the keyboard and the internal construction. 

Instead a flexible Printed Circuit Board (PCB) used in the predecessor TI-57 LCD this calculator sports a rigid PCB construction.

In 1985 Texas Instruments shifted production of the TI-57 II from Taiwan to Italy. Two things happened:

The rigid PCB was changed to a flexible PCB.
The "PROGRAMMABLE / CONSTANT MEMORY" designation was changed.

Don't miss the TI-57 II manufactured in Italy. 

TI-55-III_Switch.jpg (21749 Byte)Between 1985 and 1986 Texas Instruments created an amazing number of different designs in the "Second Generation - Slanted LCD" calculator series just by moving production to far-east contract manufacturers, fetching manufacturing back to their own facilities and revising the design. Please click on the picture at the right as a switchboard to all known versions of the Second Generation Slanted LCD calculators.

 

 



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

Joerg Woerner, November 10, 2004. No reprints without written permission.