Texas Instruments TI-Lycée ( Design Validation Tests)

Date of introduction:  (June 2009) Display technology:  LCD dot matrix
New price:   Display size:  8 * 16 characters
Size:  7.2" x 3.2" x 0.85"
 183 x 82 x 22 mm3
Weight:  6.0 ounces, 171 grams Serial No:  
Batteries:  4*AAA + CR1620 (35mA) Date of manufacture:  mth 07 year 2008
AC-Adapter:   Origin of manufacture:  China (P)
Precision:  14 Integrated circuits:  ASIC: TI REF TI-738X
 Flash: Spansion S29AL004D
 Display: Toshiba T6K04
Program steps:  27k Bytes Courtesy of:  Joerg Woerner 

Texas Instruments announced on their French website in May 2009 the as a new entry-level Graphing calculator with reduced functionality to compete with the very popular Casio Graph 25+. It is based on the TI-82, a mixture of the original TI-82 STATS and the TI-83 PLUS.

This TI-Lycée calculator is the Prototype of the used for Design Validation Tests, Lycée being the French translation of High School. In North America the TI-73 was developed for the same target audience already in 1998 and is in 2020 as TI-73 Explorer still available.

Dismantling this TI-Lycée Prototype manufactured in July 2008 reveals no big surprises. The printed circuit board (PCB) is identical with the TI-82 and contains just three integrated circuits:

Flash ROM
Display Driver

The picture on the right gives an enhanced view of the ASIC "TI-REF TI-738X" 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 was probably manufactured by Toshiba and recalls us the TI-83 Plus Silver Edition with the "TI-REF 83PL2M/TA2" ASIC and the early TI-84 Plus with its "TI-REF 83PLUSB/TA2" ASIC. The ASIC "TI REF TI-738X" was obviously used in the revised TI-73 Explorer, too.

The TI-Lycée is based - like most Graphing calculators introduced after the TI-83 - on Flash technology, we located in this TI-Lycée a Spansion S29AL004D device with 512k Bytes capacity for programs and data.

The driver circuit of the LC-Display was traditionally manufactured by Toshiba for Texas Instruments' graphing calculators. This TI-Lycée manufactured in July 2008 still sports a Toshiba T6K04 driver, while we discovered in the manufactured in 2009 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.



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

[2nde] [Suppr] [Mode] [2nde] [Suppr]

Information provided by Xavier Andréani.  


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© Joerg Woerner, May 28, 2020. No reprints without written permission.