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UM66T Series Simple Melody Generator
Features
n 62-note ROM memory n 1.
3V to 3.
3V operating voltage and low power con-
sumption n Dynamic speaker can be driven with an external
NPN
transistor.
n OSC.
resistor is built- in n One-shot mode or level-hold mode can be selected n Power on reset; melody begins from the first note n Direct piezo drive.
General Description
The UM66T series is a CMOS LSI designed for use in door bells, telephones and toy applications.
It is an on-chip ROM programmed for musical performance.
Produced by CMOS technology, the device results in very low
power consumption.
Since the UM66T series includes oscillator and mode selector circu...