DATAMATH CALCULATOR MUSEUM
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
|Program steps:||24k Bytes, 160k Bytes Flash-ROM||Courtesy of:||Joerg Woerner|
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.
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
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.
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.
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] 
Information provided by ticalc.org
and Xavier Andréani.
The TI-83 Plus is permitted (as of September 27, 2007) for use on SAT, ACT, PSAT and AP exams.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, August 16, 2007. No reprints without written permission.