Texas Instruments TI-56

Date of introduction:  1986 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:  84078
Batteries:  2*LR44 Date of manufacture:  mth 05 year 1985
AC-Adapter:   Origin of manufacture:  Taiwan (C)
Precision:  11 Integrated circuits:  TP0456/CD4555, CD4556
Memories:  1-8    
Program steps:  56-0 Courtesy of:  Joerg Woerner

You know this calculator? The TI-56 is the European version of the TI-55 III sold elsewhere.

TI-56_Taiwan_Label.jpg (17163 Byte)The Date code on the backside of this TI-56 reveals with Compal Electronics a well known contract manufacturer still in business for Texas Instruments. 

TI-56_Taiwan_Back.jpg (29193 Byte)Please notice the battery compartment of this TI-56. Calculators
manufactured by Inventec Corporation make use of different battery contacts and an additional screw to fix the housing.

TI-56_Taiwan_PCB.jpg (65681 Byte)Even the printed circuit boards (PCB's) of the two siblings manufactured in Taiwan differ completely. Inventec Corporation placed both Integrated Circuits (IC's) on one side, Compal Electronics used both sides of the PCB.

In 1985 Texas Instruments shifted production of the TI-56 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-56 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 Original Equipment Manufacturers (OEMs) in Far East, moving 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 Woerner, May 23, 2005. No reprints without written permission.