Texas Instruments TI-83 Plus (France)

Date of introduction:  June 2007 Display technology:  LCD dot matrix
New price:  EUR 104.99  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:  2874004210
Batteries:  4*4*AAA + CR1620 (35mA) Date of manufacture:  mth 07 year 2007 (K)
AC-Adapter:   Origin of manufacture:  China (S)
Precision:  14 Integrated circuits:  ASIC: TI-REF TI-738X
 Flash: S29AL004D70
 Display: NT7564H
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!

In the fast moving world of electronics and manufacturing technology it was for sure that we will see a lot of improvements of the TI-83 Plus till its discontinuation. In 2008 the TI-83 Plus is still available in the shelves of the US and European stores and we recently acquired a whole bunch of them:

• A light blue TI-83 Plus manufactured in April 2007 by Nam Tai Electronics, Inc. in China  
    for the US retailer Target.
A translucent blue TI-83 Plus manufactured in August 2006 by Inventec, Inc. in China 
    for the French market.
This pink TI-83 Plus manufactured in July 2007 by Inventec, Inc. in China for the 
    French market and its translucent blue TI-83 Plus sibling manufactured in April 2007.

Comparing these 2006/2007 manufactured calculators 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 board (PCB) needs just 3 Integrated Circuits:

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


There are minor differences between the components located in the different production batches:

Manufacturer Date code ASIC Flash-ROM Display Driver
Inventec August 2006 TI-738X Spansion S29AL004 Toshiba T6K04
Inventec April 2007 TI-738X Spansion S29AL004 Novatek NT7564H
Nam Tai April 2007 Chip-On-Board Macronix MX29LV400 Novatek NT7564H

The picture on the right gives an enhanced view of the ASIC "TI-REF TI-738X" that clocks the Z-80 microprocessor with 6 MHz and incorporates the 32k Byte RAM and some supporting logic. The ASIC was probably manufactured by Toshiba and recalls us the TI-83 Plus Silver Edition with the "TI-REF 83PL2M/TA2" ASIC and the early TI-84 Plus with its "TI-REF 83PLUSB/TA2" ASIC. The ASIC "TI-REF TI-738X" was obviously used in the revised TI-73 Explorer, too.

The driver circuit of the LC-Display was traditionally manufactured by Toshiba for Texas Instruments' graphing calculators. This TI-83 Plus manufactured in 2007 shows with the Novatek NT7564H a one-by-one replacement. It is just a bare 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 France introduced in 2008 the TI-83 with not only translated menues but even keys and discontinued the TI-83 Plus.


1.19 (January 16, 2006, actual in February 2008)

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, February 5, 2008. No reprints without written permission.