Texas Instruments TI-83 Plus (Target)

Date of introduction:  August 2007 Display technology:  LCD dot matrix
New price:  $98.99  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:  124225687
Batteries:  4*AAA + CR1620 (35mA) Date of manufacture:  mth 04 year 2007
AC-Adapter:   Origin of manufacture:  China (N)
Precision:  14 Integrated circuits:  ASIC: TI-REF TI-738X
 Flash: MX29LV400
 Display: Novatek NT7564H
Program steps:  24k Bytes, 160k Bytes Flash-ROM Courtesy of:  Joerg Woerner

TI-83PLUS_TBL_BOX.jpg (362067 Byte)This colorful TI-83 Plus was introduced for the Back-to-School 2007 campaign by retailer Target together with a pink TI-503SV, a pink TI-30X IIS and the TI-84 Plus Silver Edition in both pink and blue. 
Please remember the wonderful TI-83 Plus Cool Blue and Ultra Violet editions distributed exclusively by Target in 2001 resp. 2001.

TI-83PLUS_TBL_PCB.jpg (333008 Byte)Disassembling this TI-83 Plus manufactured in April 2007 by Nam Tai Electronics, Inc. reveals a new internal construction.

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

We noticed already with the TI-84 Plus introduced in 2004 a higher integration of the components and Texas Instruments made its lessons well with the TI-83 Plus. The new designed printed circuit board (PCB) needs just 3 Integrated Circuits:

ASIC: Z-80 microprocessor, RAM and supporting logic
Macronix MX29LV400: 512k Byte Flash-ROM
Novatek NT7564H: Single-chip 64*120 pixel display driver

TI-83PLUS_TBL_ASIC.jpg (195167 Byte)The picture on the right gives an enhanced view of the ASIC that clocks the Z-80 microprocessor with 6 MHz and incorporates the 32k Byte RAM and some supporting logic. The ASIC makes use of chip-on-board technology and without destroying the calculator we can't tell the manufacturer. Recently we discovered a TI-83 Plus from a 2007 production run using an ASIC with a traditional style package labeled with "TI-REF TI-738X (220C080FG102)". We assume that Nam Tai uses the same silicon for the chip-on-board assembly.

TI-83PLUS_TBL_CI.jpg (448682 Byte)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 announced June 2002 an optional full-sized QWERTY Keyboard for a more convenient entry of notes into the handhelds.


TI-83Plus_N0407S_OS.jpg (44649 Byte)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 Andréani.

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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© Joerg Woerner, August 16, 2007. No reprints without written permission.