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Texas Instruments TI Business Analyst

Date of introduction:  June 13, 1976 Display technology:  LED-stick
New price:  $49.95 Display size:  8 (5 + 2)
Size:  5.8" x 3.1" x 1.4"
 148 x 78 x 36 mm3
   
Weight:  4.0 ounces, 114 grams Serial No:  3680059
Batteries:  BP5, BP8 Date of manufacture:  wk 26 year 1978
AC-Adapter:  AC9131, AC9132 Origin of manufacture:  USA (ATA)
Precision:  11 Integrated circuits:  TMC0982
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
Download leaflet:   (US: 1.9M Bytes) Download manual:   (US: 5.6M Bytes)

Business-Analyst_Back.jpg (58710 Byte)The Business Analyst was introduced mid of 1976 together with the entry calculator TI-30 and the SR-40. The technology behind the Business Analyst was identical to the SR-40 and is described there.

The Business Analyst was the first in a successful line targeting financial calculations. It continued with the face-lifted Business Analyst I, the LCD model Business Analyst II and you'll find in each scientific/programmable epoch a financial variant. 

The calculator was able to perform 5 different calculation modes:

Standard math
Annuities
Compound interest
Profit margin
Linear regression

If you think about the allegory of the SR-40 and TI-30 you'll find it with the Business Analyst and the Money Manager.

Business-Analyst_PCB.jpg (25322 Byte)The Business Analyst and all other (except the SR-51-II and TI-45) calculators in the Majestic-line used a LED-stick carrying the whole electronics! If you dismantle such a calculator you'll find the LED-stick, one resistor and one integrated circuit in a 28 pin housing. The electronics of the Business Analyst is centered around a TMC0982 circuit, a member of the TMC0980 single-chip calculator family, while the TI-45 uses a chip from the TMC1980 family. Both designs are based on the TMS1000 Microcomputer series with an increased memory capacity of 18,432 Bits Read-Only Memory (ROM, 2k*9 Bits) and 576 Bits Random-Access Memory (RAM, 9 Registers * 16 digits). Main differences between the TMC0980 and TMC1980 are the display drivers - while the former supports LED displays, adds the latter high-voltage drivers for Vacuum Fluorescent Displays (VFD). In addition includes the TMC1980 both an integrated charge pump driver to generate the high voltage (around -22V) for the Anodes and Grids of the VF-Display and integrated drivers for the Filament (heater) allowing for reasonable manufacturing costs.

Simply by comparing the designation of the integrated circuits of the entry line "Majestic" calculators, you'll get the all members of this family:

 

TMC0980    Goulds Pumpulator uses a custom design ROM (CD9801)
TMC0981    TI-30 and SR-40
 
TMC0982    Business Analyst and TI-41
TMC0983    Programmer
TMC0984    TI-33

Digging deeper into the TMC098x calculator chips you'll locate an OEM-chip used on a TI-30 "clone" manufactured in Hong Kong:

TMC0985    Amelia Scientific 2001

The usage of these modern calculators was easy, Texas Instruments invented with the SR-52 the AOS entry that allowed up to three pending operations within the parantheses.

In Europe this calculator was sold as TI-41.

The TI Business Analyst is featured in the Texas Instruments Incorporated bulletin CL-207A dated 1977.

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

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