W538A806

W538A8XX Data Sheet 8-Ch Speech/Melody/LCD Controller (ViewTalk TM Series) 1. General description ........................................................................................................................................ 2 2. Features ......................................................................................................................................................... 3 3. PIN description ............................................................................................................................................... 5 4. Electrical Characteristics ................................................................................................................................ 7 4.1. ABSOLUTE MAXIMUM RATINGS....................................................................................................... 7 4.2. D.C. Characteristics ............................................................................................................................. 7 4.3. AC CHARATERISTICS........................................................................................................................ 9 4.4. Main-Clock oscillation Freq Vs. Resistor ........................................................................................... 10 4.5. Sub-Clock oscillation Freq Vs. Resistor............................................................................................. 10 5. Typical Application circuit .........................