HT81XXX    Easy Voice^TM Speech

Revision # 1.50   Modifications made on November 2 1, 2006

• In the Pin Description Table the Description content for pins OE(bar) an VPP now applies to only the HT81R09 and HT81R18 devices.

Revision # 1.40   Modifications made on March 1, 2005

• At the Electrical Characteristics table, Oscillating Frequency f_OSC entries were added.
• After the Electrical Characteristics table, Characteristics Curve section was added with V vs F Characteristics Curve shown.

Revision # 1.30   Modifications made on November 15, 2004

• The Selection Table was modified.
• At the Pin Assignment, Pad Assignment and other related sections, HT81R09 was added.
• The Pad Assignment diagram and Pad Coordinates table for the HT81R36 were modified.

Revision # 1.20   Modifications made on September 1, 2004

• At the Application Circuits section, the Mask Type and the OTP Type diagrams were modified.

Revision # 1.10   Modifications made on June 4, 2004

• Part Number HT81R18 was added to the Selection Table, Pin Assignment, Pad Assignment and all other related sections.
• At the Application Circuits section, all the Mask Type were modified with labels HT81XXX and all the OTP Type MCUs were modified with labels HT81RXX.

Revision # 1.00   This was posted on January 3, 2003