Texas Instruments TI-89 (European edition)

Date of introduction:  May 2003 Display technology:  LCD dot matrix
New price:   Display size:  100 * 160 pixels
Size:  7.2" x 3.2" x 0.80"
 182 x 81 x 20 mm3
Weight:  6.4 ounces, 182 grams Serial No:  2181006537
Batteries:  4*AAA + CR1620 (35mA) Date of manufacture:  mth 06 year 2003 (F)
AC-Adapter:   Origin of manufacture:  China (S)
Precision:  14 Integrated circuits:  CPU: MC68EC000
 ASIC: TI-REF 200C040
 Flash: LH28F160
 RAM: 2*TC551001
Program steps:  188k Bytes, 702k Bytes Flash-ROM Courtesy of:  Joerg Woerner

TI-89_S0603_Back.jpg (283584 Byte)TI-89_CMP.jpg (172885 Byte)The TI-89 introduced in the 1998 could be called the most enhanced calculator of the pre-2000 time. 

In Europe in 2003 a new styling with a dark blue case appeared to make it more attractive for the students. 

TI-89_S0603_DISP.jpg (382222 Byte)Other cosmetical changes incluse a new color scheme of the keyboard and a silver frame around the display. 

In May 2003 the new operating system 2.09 was introduced to make the TI-89 more user friendly. It included:

• Icon desktop for easy navigation to the applications
• Real time clock with date
• Pre-loaded applications
• CellSheet to enhance the TI-89 with spread sheet capabilities
• Statistics with list editor to enhance the statistics functions of the TI-89
• Language localizers for French & German
• New multi curricular functions
• TI Reader to read .txt, .htm and OEB formats
• Datamate
• Better integration with Cabri II Plus
• Better integration with Derive6"

TI-89_S0603_PCB.jpg (424972 Byte)Dismantling this TI-89 manufactured in June 2003 reveals no surprises, it is based on the TI-89 Hardware Version 2.00 known since 2000. It makes use of just 5 main components on the printed circuit boards (PCB’s):    

TI-89_S0603_ASIC.jpg (178018 Byte)TI-89_S0603_CPU.jpg (127522 Byte)CPU (Central processing Unit): The Motorola MC68EC000 - the original M68000 16/32-bit microprocessor introduced in 1979 - optimized for embedded applications is supported by the ASIC TI-REF 200C040 and replaces the costumized SC414181 solution of the TI-89 Hardware Version 1.00.

TI-89_S0603_ROM.jpg (153017 Byte)ROM (Read Only Memory): The ROM contains the operating system of the calculator. The first products on the market used mask-programmable ROM, the program was strored already during the production of the Integrated Circuit. Later calculators changed to Flash-ROM, a technology allowing the programming of the software during the final production stage of the calculator. With the TI-83 Plus and all later graphing calculators from Texas Instruments even the user was able to reprogram the operating system.

The Flash-ROM LH28F160 of this TI-89 was manufactured by Sharp, Japan. The capacity of the memory is 1M*16, or the equivalent of 2M Bytes.  

RAM (Random Access Memory): The RAM is used as data memory and is used to store both variables, user programs and intermediate results. This TI-89 makes use of two TC551001 manufactured by Toshiba, Japan. The capacity of the memory is 128k Bytes, each.

TI-89_S0603_LC.jpg (319868 Byte)DISPLAY: A deeper exploration of the TI-89 display drivers shows the unbelievable high density of electrical connections between the two display controllers manufactured by Sharp, Japan and the graphics screen. 

The clock and the icon desktop were new features included in the OS 2.07 and upwards. You can easily update an elder TI-89 to OS 2.08 or OS 2.09 so that it will include the clock as well. However the clock will not activate with a TI-89 Hardware Version 1.00, it has to be Hardware Version 2.00.

Texas Instruments announced January 7, 2004 with the TI-89 Titanium the successor of the TI-89. Main differences are:

• More stylish housing with integrated kickstand
• Integrated USB port for computer connecitivity
• Three times of user memory
• Advanced display
• 16 pre-loaded software applications

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. Texas Instruments announced June 2002 an optional full-sized QWERTY Keyboard for a more convenient entry of notes into the handhelds.

Don't miss the colorful slide cases developed for the TI-83 Plus, they fit on the TI-89, too.


The two different hardware revisions of the TI-89 are known as HW1 and HW2. You can check the HW version of your TI-89 using the following key sequence and reading the number on your screen:  

[F1] [A]

Please notice that HW1 revisions report just the ROM version while HW2 reports the hardware revision, too. Main differences between HW1 and HW2 are the display access (Direct Memory Access vs. Memory Mapped IO), processor speed (10 MHz vs. 12 MHz) and limitations of the assembly program size).


TI-89_S0603_OS.jpg (67624 Byte)2.08 (July 29, 2002, recalled and re-released February 20, 2003)
2.09 (May 20, 2003, actual in February 2008)  

Advanced Mathematics Software v2.09

You can check the ROM version of your TI-89 using the following key sequence and reading the number on your screen:

[F1] [A]

Information provided by and Xavier Andrιani.

Exam acceptance:

Since the TI-89 lacks a QWERTY keyboard it is permitted (as of September 27, 2007) for use on SAT, PSAT and AP exams. Calculators with computer algebra system (CAS) functionality are not allowed on ACT exams.

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© Joerg Woerner, November 15, 2003. No reprints without written permission.