Texas Instruments TI-620

Date of introduction:  1992 Display technology:  LCD
New price:   Display size:  10
Size:  4.7" x 5.0" x 0.80"
 120 x 128 x 20 mm3
Weight:  3.6 ounces, 102 grams Serial No:  
Batteries:  n.a. Date of manufacture:  mth 12 year 1993
AC-Adapter:   Origin of manufacture:  Malaysia (I)
Precision:  10 Integrated circuits:  Inventa LI3163
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (EU: 4.7M Bytes)

Texas Instruments introduced in Europe with the TI-620 a very useful calculator. Beside the basic calculator functions six additional keys enable the COST, SELL, MARGIN calculations. You enter either two of the variables and get instantly the result of the remaining value.

In the United States a very similar calculator was sold as BA-20 Profit Manager.

Dismantling this TI-620 manufactured in December 1993 by Inventec Corporation in Malaysia reveals indeed a printed circuit board (PCB) identical with the BA-20 and centered around an Inventa LI3163 single-chip calculator circuit.

Inspecting the PCB of this BA-20 Profit Manager calculator brought our attention to a small mark reading IOBA20-02B, we spotted this PCB-Mark already with the BA-20. We started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.

The stylish housing of the TI-620 in known from the earlier TI-610 calculator.

Don't miss the TI-620 Printing Calculator introduced already in 1974.



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If you have additions to the above article please email:

Joerg Woerner, December 5, 2001. No reprints without written permission.