HT3820

The HT3820 is a kind of single-chip 128 note melody generators implemented in CMOS technology.It can play a melody of 128 notes by trigger input or automatically when power is on.Customers'melody sources are programmed by changing a masking layer during device fabrication.

Features of the HT3820 are:(1)working voltage is 2.4 V to 5.0 V; (2)7 temp options; (3)2 "CHA" envelope; (4)normal or octave higher option; (5)4 operation modes; (6)extremly few external components; (7)drive an 8 ohms speaker through an NPN transistor; (8)3-pin TO-92 or 16 DIP/SOP package.

The absolute maximum ratings of the HT3820 can be summarized as:(1): supply voltage is -0.3 V to +5.5 V; (2): input voltage is Vss-0.3 V to VDD+0.3 V ; (3): storage temperature is -50 to 125; (4): operating temperature is -20 to 75.