Texas Instruments TI-84 (France)

Date of introduction:  June 15, 2011 Display technology:  LCD dot matrix
New price:  EUR 104.99  Display size:  8 * 16 characters
Size:  6.32" x 3.1" x 0.80"
 160 x 80 x 21 mm3
Weight:  5.0 ounces, 142 grams Serial No:  1034002506
Batteries:  4*AAA + SR44 (35mA) Date of manufacture:  mth 04 year 2011
AC-Adapter:   Origin of manufacture:  China (K)
Precision:  14 Integrated circuits:  ASIC: TI REF 84PLCR/TA1
 Flash: A29L800A
 Display: Novatek NT7564H
Program steps:  24k Bytes, 480k Bytes Flash ROM Courtesy of:  Joerg Woerner

Texas Instruments France promoted already in 1988 with the Galaxy 10 a calculator with country specific particularities. Both the TI-40 Collège and TI-40 Collège II continued this approach in 1997 resp. 1999 and supported the "French fractions". Starting in 2005 Texas Instruments put another log on the fire and changed not only the computing algorithm but even keys, notations and menus to French language with the colorful TI-Collège.
Texas Instruments France introduced in 2006 with the TI-82 the first nationalized graphing calculator. In February 2008 hit the TI-Collège Plus the market and in June 2008 was the TI-83 introduced in the local market. We know the astonishing since June 2009 and this amazing TI-84 was introduced two years late in Summer 2011.

And what is so amazing with the TI-84 Just the size, it packs the specifications of the original TI-84 Plus into a much smaller footprint. Don't miss the similar TI-84 Plus Pocket SE introduced a few month later in Asia.

Dismantling this TI-84 manufactured in April 2011 by Kinpo Electronics, Inc. reveals a design using the components and Operating System of the recent TI-84 Plus on a very compact printed circuit board (PCB):

TI REF 84PLCR/TA1: Z80 microprocessor, RAM, USB-Port 
    and supporting logic
AMIC A29L800A: 1M Bytes Flash ROM
Novatek NT7564H: Single-chip 64*120 pixel display driver

The picture on the right gives an enhanced view of the ASIC that clocks the Z80 microprocessor with 15 MHz and incorporates the RAM, USB-Port and logic. Learn more about the Hardware Architecture of TI’s Graphing Calculators. Please notice the smaller package of the new TI REF 84PLCR/TA1 ASIC compared with the previous TI REF 83PLUSB/TA2 or TI REF 84PLUSB/TA3 found in the TI-84 Plus family manufactured between 2004 and 2007.

Recently members of the Graphing Calculator Programming community under the lead of Xavier Andréani made a very interesting discovery:

All TI-84 Plus / S.E. with the TA2 or TA3 ASIC have access to 128k Bytes RAM.
All TI-84 Plus / S.E. with the TA1 ASIC have access to only 48k Bytes RAM using
    the same assembly commands.

This TI-84 manufactured in April 2011 makes use of one AMIC Technology Flash ROM with 1M Bytes capacity.

The driver circuit of the LC-Display was traditionally manufactured by Toshiba for Texas Instruments' graphing calculators. This TI-84 manufactured in 2011 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.


2.55MP (January 11, 2011, actual in November 2011)

You can check the ROM version of your TI-84 using the following key sequence and reading the number on your screen:

[2nd] [MEM] [1]

Information provided by and Xavier Andréani.

Exam acceptance:

The TI-84 is permitted (as of November 2, 2011) for use on SAT, ACT, PSAT and AP exams.


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© Joerg Woerner, November 2, 2011. No reprints without written permission.