UM66 Melody Generator IC 1.5V-4.5V 3-Pin
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Prices updated: 13 Oct 2026
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About this product
A CMOS melody generator IC that outputs a built-in tune on a single pin. It is commonly used in door chimes, telephones, toys and alarm systems, operates from 1.5 V to 4.5 V with very low power consumption, and starts the melody from its first note each time power is applied.
Specifications
- Supply voltage
- 1.5 V to 4.5 V
- Technology
- CMOS
- Package
- 3-pin, resembles a transistor
- Pin 1
- Ground
- Pin 2
- VCC
- Pin 3
- Melody output
- Power consumption
- Very low
Frequently asked questions
How do I wire the UM66?
Connect pin 1 to ground, pin 2 to the positive supply (VCC) within 1.5 V to 4.5 V, and take the melody signal from pin 3. Pin 3 is the output, so drive a speaker or buzzer through a circuit suited to your design.
Does the melody restart after power is removed and reapplied?
Yes. The generator resets when power is turned on and begins the melody from its first note.
