The UM66 Musical IC is a 3‑pin melody generator chip widely used in toys, doorbells, alarms, and musical greeting cards. It operates at low voltage (1.5V–3V) and produces pre‑programmed tunes stored in its internal ROM. Compact and easy to use, the UM66 IC is perfect for DIY electronics projects, novelty devices, and educational demonstrations.

Specifications

• Type: Melody generator IC

• Package: TO‑92 (3 pins)

• Operating Voltage: 1.5V–3V (max 4.5V)

• Current Consumption: ~60 µA (low power)

• ROM Capacity: ~62–64 notes depending on version

• Tone Range: C4 to C6 (258Hz–23.7kHz)

• Output: Melody signal (requires transistor amplifier for speaker drive)

• Applications: Toys, telephones, alarms, musical cards, novelty electronics

Features

• Pre‑programmed melodies (different versions available)

• Ultra‑low power consumption for battery‑based devices

• Compact TO‑92 package for easy integration

• Simple 3‑pin design (VCC, GND, OUT)

• Ideal for DIY projects, educational kits, and novelty electronics

• Reliable performance with consistent melody playback

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