HT16515 1/4 to 1/12 Duty VFD Controller Revision # 2.00 Modifications made on June 23, 2015 The Pin Description section was modifed. The Package Information section was modified. Revision # 1.90 Modifications made on November 5, 2012 In the Features and other related sections, the 44-pin QFP package was deleted Revision # 1.80 Modifications made on September 30, 2011 The Pad Assignment section was modified. In the D.C. Characteristics section, the fOSC value was modified. The Package Information section was modified. Revision # 1.70 Modifications made on May 7, 2010 In the Features, Pin Assignment and other related sections, a new 44-pin LQFP package type was added. The Package Information section was modified. Revision # 1.60 Modifications made on April 1, 2009 In the A.C. Characteristics table, the Clock Frequency parameter was modified. Revision # 1.50 Modifications made on October 30, 2008 The Pad Assignment section, the chip size value was modified. The Package Information section was modified. Revision # 1.40 Modifications made on November 1, 2007 The Pad Assignment section was modified. In the D.C. Characteristics section, the values for IOL was modified. Revision # 1.30 Modifications made on November 21, 2006 The Ioh source current values in the DC Characteristics table have been moved to the correct maximum column. Revision # 1.20 Modifications made on October 12, 2005 At the Features section, the Logic voltage value was modified from 5V to 3.0V~5.5V At the D.C. Characteristics table, the Test Conditions VDD and IOL entries were modified. Revision # 1.10 Modifications made on October 4, 2005 A Technical Document section was added. At the D.C. Characteristics table, the 3.3V VDD data was added. At the A.C. Characteristics table, the 3.3V VDD data was added. In the Timing Diagrams section, the note of the Serial Communication Format was modified. Revision # 1.00 This was posted on December 19, 2003