DATAMATH CALCULATOR MUSEUM
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
Display: Novatek NT7564H
|Program steps:||27k Bytes||Courtesy of:||© Texas Instruments|
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:
• Display Driver
The ASIC "TI-REF TI-738X"
obviously used in the revised TI-73
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-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.
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]
Information provided by Xavier Andréani.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, June 6, 2009. No reprints without written permission.