DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-73 Explorer
|Date of introduction:||2003||Display technology:||LCD dot matrix|
|New price:||$69.99 (SRP 2008)||Display size:||8 * 16 characters|
|Size:|| 7.2" x 3.2" x 0.80"
182 x 81 x 20 mm3
|Weight:||6.4 ounces, 182 grams||Serial No:||2242007236|
|Batteries:||4*AAA + CR1620 (35mA)||Date of manufacture:||mth 04 year 2004 (D)|
|AC-Adapter:||Origin of manufacture:||China (S)|
|Precision:||14||Integrated circuits:|| CPU: Zilog Z84C00
ASIC: TI-REF 9815455
|Program steps:||25k Bytes, 128k Bytes Flash-ROM||Courtesy of:||Joerg Woerner|
TI-73 Explorer followed the TI-73 and serves as a bridge between the TI-15
Explorer and the TI-83 Plus.
Dismantling the TI-73 Explorer reveals no surprises, the printed circuit boards (PCBs) are still identical with the TI-83 Plus and based on 5 main Integrated Circuits:
|• Zilog Z84C00 microprocessor
• TI REF 9815455 ASIC
• Fujitsu F29LV400 512k Byte Flash-ROM
• Hyundai HY62WT081
32k Byte RAM
picture on the right gives an enhanced view of the ASIC "TI-REF 9815455"
integrating some support
A component not easily detected on the printed circuit board (PCB) of the TI-73 Explorer is the driver circuit of the LC-Display. 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.
Don't muss the colorful slide cases developed for the TI-83 Plus, they fit on the TI-73 Explorer, too.
Texas Instruments reduced in 2006 the chip count of both the TI-73 Explorer and its technical twin TI-83 Plus with the integration of the Z84C00 microprocessor, 32k Byte RAM and TI REF 9815455 ASIC into a single-chip solution. In 2009 the grandfather of all Flash-ROM based calculators, the TI-73, morphed into the skin of the TI-84 Plus. Don't miss the new TI-73 Explorer.
Stokes Publishing Company, Inc. based in Sunnyvale, California sold a companion for the teacher, view the wonderful TI-73 Explorer.
Explorer™ is a trademark of Texas Instruments.
1.60 (December 16, 2001)
1.90 (February 6, 2006)
1.91 (March 20, 2008, actual in February 2009)
You can check the ROM version of your TI-73
Explorer using the following key sequence and reading the number on your screen:
[2nd] [MEM] 
Information provided by ticalc.org
and Xavier Andréani.
The TI-73 Explorer is permitted (as of September 27, 2007) for
use on SAT, ACT,
PSAT and AP
exams but is not recommended for the AP exam.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, November 11, 2004. No reprints without written permission.