The FT66/UM66 series are CMOS LSI designed for use in door bell, telephone and toy application. It is an on-chip ROM programmed for musical performance. Produced by CMOS technology, the device results in very low power consumption. Since the UTC UM66TXXL series include oscillation circuits a compact melody module can be constructed with only a few additional components.

 Features :

• 64-Note Rom memory
• 1.5V ~ 4.5V power supply and low power consumption
• Dynamic speaker can be driven with external NPN transistor
• OSC resistor hold mode
• Power on reset: melody begins from the first note
• Built in level hold mode