DATAMATH CALCULATOR MUSEUM
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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 |
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| 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 |
| Memories: | |||
| Program steps: | 24k Bytes, 160k Bytes Flash ROM | Courtesy of: | Joerg Woerner |
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.
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 Bytea Flash ROM
• 32k Bytes Static 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: Z80 microprocessor, RAM
and supporting logic
•
Macronix MX29LV400: 512k 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 6 MHz and incorporates the 32k Bytes RAM and some supporting logic. Learn more about the
Hardware Architecture of TI’s Graphing Calculators.
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.
ROM-Versions:
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:
