DATAMATH CALCULATOR MUSEUM |
Texas Instruments BA Real Estate
Date of introduction: | 1993 | Display technology: | LCD |
New price: | Display size: | 3 + 10 (7 + 2) | |
Size: | 5.7" x 2.8" x 0.45" | ||
Weight: | 2.9 ounces | Serial No: | |
Batteries: | 2*LR44 | Date of manufacture: | mth 07 year 1993 |
AC-Adapter: | Origin of manufacture: | Italy | |
Precision: | 13 | Integrated circuits: | Toshiba T6M51 |
Memories: | 1 | ||
Program steps: | Courtesy of: | Joerg Woerner |
In 1993 Texas Instruments introduced a new design that replaced both the TI-68 look of the earlier TI-35X and the boxy design of the TI-30 Stat calculator.
The smooth shape together with rubber-like keys was used with 5 different calculators:
BA Real Estate Financial calculations
• TI-30X New display with 10 + 2 digits, 3 memories • TI-30X SOLAR With Anylite solar-cells • TI-35X Adds 2-dim statistics and hex-calculations • TI-36X SOLAR With Anylite solar-cells |
The internal construction of these calculators is identical and based on a flexible printed circuit board (Flex-PCB) for the keyboard and a Rigid-PCB for the display and calculator chip in a conventional Flat-pack housing.
This design approach creates a lot of interconnections between
the components but the
calculator line was one of the most reliable designs of Texas Instruments ever.
The BA Real State does:
• Quickly computes principal and interest payment amounts • Computes buyer qualification for both income and loan amount • Accepts qualifying ratio values based on local rates to computer the buyer qualifications • Calculates PITI (principal, interest, taxes, and insurance) • Computes ARMs, bi-weekly payments, Canadian mortgages • Solves time-value-of-money calculations • Generates amortization schedules with an automatic incrementing feature • Converts between nominal (NOM) and effective (EFF) interest rates • Includes 32 worksheets for use with clients and to practice calculator skills |
In 1996 the design of these calculators was changed again. View the updated BA Real Estate here.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.