Texas Instruments TI-83 Plus

Date of introduction:  June 2004 Display technology:  LCD dot matrix
New price:     Display size:  8 * 16 characters
Size:  7.2" x 3.2" x 0.80"
 182 x 81 x 20 mm3
Weight:  6.4 ounces, 182 grams Serial No:  2511089854
Batteries:  4*AAA + CR1620 (35mA) Date of manufacture:  mth 05 year 2004 (E)
AC-Adapter:   Origin of manufacture:  China (S)
Precision:  14 Integrated circuits:  ASIC: Inventec 6SI837
 Flash: F29LV400 
 Display: Toshiba T6K04
Program steps:  24k Bytes, 160k Bytes Flash-ROM Courtesy of:  Joerg Woerner

Texas Instruments introduced the original TI-83 Plus already in 1999 as the successor of the TI-83. It was an immediate success on the market and it was for a long time frame the best selling graphing calculator in the US and Canada. Texas Instruments reported more than 2,000,000 shipped units in 2000!

Glitter-packed and translucent, this is how Texas Instruments described the wonderful TI-83 Plus Silver Edition in its press release dated June 19, 2001. It took a few weeks and the basic TI-83 Plus was available more or less every year for the Back-to-School campaign in new colors:

• BTS 2001: Retailer Target introduces the TI-83 Plus Cool Blue. This nice looking calculator
was available in Australia, too.
• BTS 2002: Retailer Target introduces the TI-83 Plus Ultra Violet.
• BTS 2003: Retailer Target introduces the TI-83 Plus Blue.
• BTS 2004: Retailer Staples introduces this TI-83 Plus Lime Green and the TI-83 Plus Blue.
• BTS 2006: Texas Instruments surprised the French market in 2006 with a translucent
    TI-83 Plus Cool Blue.
• BTS 2007: New design of the TI-83 Plus Cool Blue and TI France introduces the strange 
    looking TI-83 Plus Pink.

Comparing this TI-83 Plus manufactured in 2004 with the original design reveals a lot of internal differences.

The original design of the TI-83 Plus made use of 5 main Integrated Circuits:

• Zilog Z84C00 microprocessor
• TI REF 9815455 ASIC
• 512k Byte Flash-ROM
• 32k Byte RAM
• Toshiba T6A04: Single-chip 64*120 pixel display driver

The new designed printed circuit boards (PCBs) needs just 3 main Integrated Circuits:

• ASIC: Z-80 microprocessor, RAM and supporting logic
512k Byte Flash-ROM
Single-chip 64*120 pixel display driver

The picture on the right gives an enhanced view of the ASIC "Inventec 6SI837" that clocks the Z-80 microprocessor with 6 MHz and incorporates the 32k Byte RAM and some supporting logic. 

A component not easily detected on the printed circuit board (PCB) of the TI-83 Plus is the driver circuit of the LC-Display. It is just a bare Toshiba T6K04 chip mounted on a flexible piece of circuit board attached between the display and the main PCB.

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. Texas Instruments announced June 2002 an optional full-sized QWERTY Keyboard for a more convenient entry of notes into the handhelds.


TI-83PLUS_S0504E_OS.jpg (46756 Byte)1.17

You can check the ROM version of your TI-83 Plus using the following key sequence and reading the number on your screen:

[2nd] [MEM] [1]

Information provided by and Xavier Andrιani.

Exam acceptance:

The TI-83 Plus is permitted (as of September 27, 2007) for use on SAT, ACT, PSAT and AP exams.


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If you have additions to the above article please email:

© Joerg Woerner, June 23, 2008. No reprints without written permission.