Texas Instruments TI-82

Date of introduction:  March 1999 Display technology:  LCD dot matrix
New price:   Display size:  8 * 16 characters
Size:  7.2" x 3.2" x 0.80"    
Weight:  5.6 ounces Serial No:  1893013387
Batteries:  4*AAA + CR1620 Date of manufacture:  mth 03 year 2000 (U)
AC-Adapter:   Origin of manufacture:  Taiwan (I)
Precision:  14 Integrated circuits:

 CPU: Zilog Z84C0008
 ASIC: Toshiba TC14L010
 ROM: LH531©1995
 RAM: KM62256
 Display: Toshiba T6A04A

Program steps:  28k Bytes Courtesy of:  Joerg Woerner

About six years after introduction of the original TI-82 the calculator received a restyling to match with the current design line. The TI-82 offers a basic set of graphing tools for mathematics and science coursework. The TI-82 is together with the TI-83 the predecessor of the upgradeable TI-83 Plus.

TI-82_1_PCB.jpg (194084 Byte)TI-82_1_Memory.jpg (245380 Byte)From a technical point of view resembles this TI-82 manufactured in 2000 more or less the original design introduced in 1993. The printed circuit board (PCB) looks very similar to the first design and makes use of the same components:

Z80 microprocessor
Toshiba TC14L010 ASIC with glue logic
Sharp LH531©1995 - Mask ROM for internal program storage
Samsung KM62256 - 32k Bytes SRAM for user program and data
Toshiba T6A04A - display driver

TI-82_1_ASIC.jpg (117451 Byte)The glue logic of the TI-82 is integrated into a Toshiba TC14L010 ASIC, known already from the first edition of the TI-82. Learn more about the Hardware Architecture of TI’s Graphing Calculators.

TI-82_1_LC.jpg (57547 Byte)A deeper exploration of the display board shows the unbelievable high density of electrical connections between the Toshiba T6A04A display controller and the graphics screen.

A serial port of the calculators allows the connection to the Calculator-Based Laboratory system CBL, its successor CBL 2, the Calculator-Based Ranger CBR and its successor CBR 2.

In 2001 another styling variation appeared, don't miss the TI-82 Parcus.


TI-82_I0300_OS.jpg (48988 Byte)19.0

You can check the ROM version of your TI-82 using the following key sequence and reading the number on your screen:


Information provided by and Xavier Andréani.

Exam acceptance:

The TI-82 is permitted (as of September 27, 2007) for use on SAT, ACT, PSAT and AP exams.

horizontal rule

If you have additions to the above article please email:

© Joerg Woerner, May 3, 2003. No reprints without written permission.