Texas Instruments TI-EC7 Pro

Date of introduction:  January 2006 Display technology:  LCD
New price:  €17.59 Display size:  12 characters and 12
Size:  6.5" x 4.5" x 1.1"    
Weight:  5.4 ounces Serial No:  
Batteries:  CR2032 Date of manufacture:  mth 11 year 2005
AC-Adapter:   Origin of manufacture:  China (N)
Precision:  12 Integrated circuits:  
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

TI-EC_BOX.jpg (52122 Byte)This TI-EC7 Pro was introduced in 2006 together with the TI-EC3 and TI-EC5 in Europe. It followed the €-1796 and €-2003 introduced already in 1999. It is not easy to follow the decision path why a complete series of Euro-calculators was introduced in 2006. Please remember that on January 1st, 2002 the introduction of the new bank notes and coins took part in EMU (European Monetary Union).

Compared with the traditional basic calculators the EC-7 Pro added a scrollable entry line featuring 12 characters to the display. The upper line permits to recall the last entry and to correct it instantly. We know this feature since 1999 from the scientific calculator TI-30X IIB.  

Read more about the Euro here.

TI-EC7PRO_PCB.jpg (155969 Byte)Dismantling the TI-EC7 reveals with a single-chip calculator circuit bonded directly to a printed circuit board (PCB) a technology known from the 1990's.

Shortly after the introduction of the TI-EC7 Pro the successor TI-EC7 Pro+ was announced together with the TI-EC3+ and TI-EC5+. At first glance the only changes are a new up-to-date design but Texas Instruments addressed the owners of the original TI-EC7 Pro with an important product update:

EC7 Pro Product Update

We have recently become aware of a computational issue with the EC-7 calculator. This does not affect the EC-3 or EC-5 models, or any of TI’s other calculators. When inputting figures less than 1.0 on the EC-7, you must input a zero before the decimal. Otherwise the answer will be incorrect. For example, in the EC-7 100 – .5-.5 = 100; 100- 0.5-0.5 = 99.

For more information, please contact our customer service center at:
Texas Instruments
Education Technology,
800 Pavilion Drive,
Northampton, NN4 7YL
Telephone: 020 8230 3184 

(© 2007:


horizontal rule

If you have additions to the above article please email:

© Joerg Woerner, May 6, 2006. No reprints without written permission.