UM88T-19L Dual-tone Melody Generator ____________________________________________________________________________ Features • 127-note ROM memory • Sound range : 2.5 octives, 2 series • Termpo : 16 kinds (presto-largo) • Double sound sources • Digital envelop effect • 1.3V to 3.3V operating voltage • Bulit-in RC oscillator st • Power-on reset, melody begins from 1 note • With external npn transistor to drive speaker • Packaged in inexpensive TO-92 package General Description The UM88T series is a CMOS LSI designed melody generator IC with accompaniment for use in telephones and toys application. It has an on-chip ROM programmed for dual-tone musical performance. Produced by CMOS technology, the device results in very low power consumption. And with built-in RC oscillator, a compact melody module can be constructed with only a few additional components. Electrical Characteristics (Vss=0V, Vdd=1.5V, Ta=25°C, unless otherwise specified.) Parameter Symbol Min. Typ. Operating voltage VDD 1.3V 1.5V Current Consumption IDD Output Current IO/P 0.6mA 1.5mA Song Series List Part number UM88T-19L Song name For Alice 1 Max. 3.3V 1mA - Conditions Playing with no load Pin Configuration (Front View) Pin no. 1 2 3 Symbol O/P VDD VSS Description Melody Output Positive Power Supply Negative Power Supply Typical Application Circuits LEVEL HOLD MODE FOR SPEAKER LEVEL HOLD MODE FOR PIEZO BUZZER Recommended values : C = 1µF , R = 4.7KΩ , Q = 2SC9013 REV.9-01 (2 pages) 2