The UM66 is a melody IC used in various consumer electronics for sound generation. Here’s a brief overview:

• Type: Melody IC
• Function: Generates pre-programmed melodies
• Supply Voltage (Vcc): Typically 2V to 3V
• Output: Directly drives a small speaker or piezo buzzer
• Package: Often available in a 16-pin DIP (Dual In-line Package) format

The UM66 is commonly used in toys, greeting cards, and other applications where simple melody playback is required. It can store multiple melodies and is usually designed for easy integration into electronic circuits.