Additional Pictures 


This TI-81 with the Date code I-1192 was manufactured
by Inventec in Taiwan in November 1992. 

The PCB (printed circuit board) of the TI-81 manufactured in November 1992
looks familiar to us with the battery contact in the center.

The main components of the TI-81: Toshiba T6A43 Application Specific CPU,  Sharp LH5359 1991 ROM and Sharp LH5160 RAM. All Integrated Circuits of the calculator were manufactured not later than July 1990.

This TI-81 graphing calculator manufactured end of 1992 makes use of three display drivers :
Two T6A39 column drivers and one T6A40 row driver.


horizontal rule

If you have additions to the above article please email:

Joerg Woerner, January 31, 2009. No reprints without written permission.