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Texas Instruments TI-76.fr

Date of introduction:  June 2009 Display technology:  LCD dot matrix
New price:  EUR 56.96 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:  2037004620
Batteries:  4*AAA + CR1620 (35mA) Date of manufacture:  mth 04 year 2009
AC-Adapter:   Origin of manufacture:  China (P)
Precision:  14 Integrated circuits:  ASIC: TI-REF TI-738X
 Flash: MX29LV400
 Display: Novatek NT7564H
Memories:      
Program steps:  27k Bytes Courtesy of:  © Texas Instruments 

Texas Instruments announced on their French website in May 2009 the TI-76.fr 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 Stats.fr, a mixture of the original TI-82 STATS and the TI-83 PLUS. In North America the TI-73 was developed for the same target audience already in 1998 and is in 2009 as TI-73 Explorer still available. Don't miss the amazing TI-84 Pocket.fr introduced in June 2011.

We prepared together with fellow collector Xavier Andréani a comprehensive comparison of entry level graphing calculators, to shed some light on the different specifications of the TI-82 and TI-83 / TI-83 Plus based products. 

Michel Zwawiak - most Texas Instruments collectors known from his eBay nickname 2004michelz - lives in France and sent the Datamath Calculator Museum in July 2009 a brand-new TI-76.fr. Thanks!

Dismantling this TI-76.fr manufactured in April 2009 reveals no big surprises. The printed circuit board (PCB) is identical with the TI-82 Stats.fr and contains just three integrated circuits:

ASIC
Flash-ROM
Display Driver


The picture on the right gives an enhanced view of the ASIC "TI-REF TI-738X" that clocks the Z-80 microprocessor with 6 MHz and incorporates the 32k Byte RAM and some supporting logic. 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.

TI-76FR_ROM.jpg (33155 Byte)The TI-76.fr is based - like most Graphing calculators introduced after the TI-73 - on Flash technology, we located in this TI-76.fr a Macronix 29LV400 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-76.fr manufactured in 2009 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.

ROM-Versions:

TI-76FR_OS.jpg (43210 Byte)1.00fr5

You can check the ROM version of your TI-76.fr 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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If you have additions to the above article please email: joerg@datamath.org.

© Joerg Woerner, June 6, 2009. No reprints without written permission.