DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-84 PLUS (Wal-Mart)
|Date of introduction:||August 2008||Display technology:||LCD dot matrix|
|New price:||$109.24||Display size:||8 * 16 characters|
|Size:|| 7.5" x 3.3" x
190 x 84 x 22 mm3
|Weight:||7.4 ounces, 208 grams||Serial No:||2498029280|
|Batteries:||4*AAA + SR44 (35mA)||Date of manufacture:||mth 03 year 2008 (J)|
|AC-Adapter:||Origin of manufacture:||China (P)|
|Precision:||14||Integrated circuits:|| ASIC: TI REF 84PLCR/TA1
Display: Novatek NT7564H
|Program steps:||24k Bytes, 480k Bytes Flash ROM||Courtesy of:||Joerg Woerner|
TI-84 Plus with a unique translucent housing was
introduced for the Back-to-School 2008 campaign by
Wal-Mart, the largest grocery
retailer in the United States, together with a blue
TI-84 Plus Silver Edition, its red
sibling and a pink
Comparing this TI-84 Plus manufactured in March 2008 (Revision Code J) with an early product assembled in 2004 reveals only few differences. The design sports still 3 chips on one printed circuit board (PCB):
|• TI REF 84PLCR/TA1: Z80 microprocessor, RAM, USB-Port
and supporting logic
• Spansion S29AL008D: 1M Bytes 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 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
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.
The driver circuit of the
LC-Display was traditionally manufactured by Toshiba for Texas Instruments'
graphing calculators. This TI-84 Plus manufactured in 2008 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
While comparing this TI-84 Plus manufactured in 2008 with a TI-84 Plus Silver Edition from 2008 we noticed that Texas Instruments used for both calculators identical PCBs. The original designs of these calculators introduced in 2004 used PCBs with some minor differences:
|Calculator||Date/Rev Code||PCB ID||PCB Date Code||ASIC||Display Driver|
|TI-84 Plus||S-0304||TG2837MB-4424||wk10 yr04||TA2||Toshiba T6K04|
|TI-84 Plus||S-0804||TG2837MB-4424||wk29 yr04||TA2||Toshiba T6K04|
|TI-84 Plus||P-0308J||GECKO-TG2837/2867-ST-2440||wk08 yr08||TA1||Novatek NT7564H|
|TI-84 Plus||P-0209L||GECKO-TG2837/2867-ST-2441||wk52 yr08||TA1||Novatek NT7564H|
|TI-84 Plus S.E.||S-0404||TG2867TMB-4424||wk15 yr04||TA2||Toshiba T6K04|
|TI-84 Plus S.E.||S-0504||TG2867PMB-4424||wk21 yr04||TA2||Toshiba T6K04|
|TI-84 Plus S.E.||S-0606F||TG2867FMB-2441||wk22 yr06||TA3||Novatek NT7564H|
|TI-84 Plus S.E.||S-0407G||GECKO-TG2837/2867MB-ST-2444||wk14 yr07||TA3||Toshiba T6K04|
|TI-84 Plus S.E.||P-0308L||GECKO-TG2837/2867-ST-2441||wk13 yr08||TA1||Toshiba T6K04|
|TI-84 Plus S.E.||P-0408L||GECKO-TG2837/2867-ST-2441||wk13 yr08||TA1||Novatek NT7564H|
|TI-84 Plus S.E.||P-0508M||GECKO-TG2837/2867-ST-2441||wk17 yr08||TA1||Novatek NT7564H|
The TI-84 Plus supports the ViewScreen panel and the TI-Presenter with an Presentation Link Adapter. A serial port of the calculators allows the connection to the Calculator-Based Laboratory system CBL, its successor CBL 2 and the Calculator-Based Ranger CBR. The added USB interface of the TI-84 Plus family calculators connects directly with the Calculator-Based Ranger CBR 2 introduced in 2004, too. With a new cradle even the optional full-sized QWERTY Keyboard introduced in 2002 matches with the TI-84 Plus series.
Texas Instruments introduced in the Asia Pacific region a different color scheme for the TI-84 Plus based on a baby blue calculator housing. Don't miss the amazing TI-84 Pocket.fr introduced in June 2011 and the TI-83 Plus.fr from 2013.
Don't miss the colorful slide cases developed for the TI-84 Plus Silver Edition, they fit on the TI-84 Plus, too.
Texas Instruments announced
on March 1st, 2010 the TI-84 Plus Operating System version 2.53MP with
MathPrint™ mode for free download. The OS 2.53MP enables users to input and view math symbols and formulas, including stacked fractions, in their handhelds exactly as the equations appear in textbooks.
2.43 (December 4,
2.53MP (February 15, 2010 includes MathPrint)
2.55MP (January 11, 2011)
You can check the ROM version of your
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-84 Plus is permitted (as of September 27, 2008) for use on SAT, ACT, PSAT and AP exams.
If you have additions to the above article please email: email@example.com.
© Joerg Woerner, October 1, 2008. No reprints without written permission.