DATAMATH CALCULATOR MUSEUM
|
DATAMATH CALCULATOR MUSEUM |
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.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.