DATAMATH CALCULATOR MUSEUM
Texas Instruments BA-20 Profit Manager (2000)
|Date of introduction:||June 2000||Display technology:||LCD|
|New price:||$24.99 (SRP 2003)||Display size:||10|
|Size:|| 4.7" x 5.0" x
120 x 128 x 20 mm3
|Weight:||3.9 ounces, 110 grams||Serial No:|
|Batteries:||n.a.||Date of manufacture:||mth 04 year 2000 (A)|
|AC-Adapter:||Origin of manufacture:||China (S)|
|Precision:||10||Integrated circuits:||Inventa LI3163|
|Program steps:||Courtesy of:||Joerg Woerner|
Instruments introduced in the United States with the BA-20
Profit Manager already in the year
1986 a very useful calculator.
Beside the basic calculator functions 6 additional keys enable the COST, SELL,
MARGIN calculations. You enter either two of the variables and get instantly the
result of the remaining value.
Dismantling this BA-20 Profit Manager manufactured in April 2000 by Inventec Corporation in Shanghai, China reveals a clean design centered around an Inventa LI3163 single-chip calculator circuit soldered on a double-sided printed circuit board (PCB) and powered by four solar cells. We suspect that Inventa Electronics designed a replacement for the obsolete Sharp LI3163 chip of the previous generation BA-20 Profit Manager or licensed its design. Please notice the confusing "Revisions" of the two otherwise identical BA-20 Profit Manager calculators, one manufactured in April 2000 with Revision A (Date code S-0400A) and one with Date code S-0500 and a blank revision field.
Inspecting the PCB of this BA-20 Profit Manager calculator brought our attention to a small mark reading BA20 PCB VER0.3, we spotted similar PCB-Marks already with the previous versions of the BA-20 Profit manager and started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.
In Europe a very similar calculator was sold as TI-620.
An earlier version of the BA-20 sports an integrated clock like the European TI-610. In August 2002 the design of the BA-20 Profit Manager was slightly changed to allow the usage of larger solar cells.
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© Joerg Woerner, December 5, 2001. No reprints without written permission.