UM66 is a 64 note melody generator IC that is available in TO-92 package. The IC can play five different tones based on the version. It can be easily used along with an NPN transistor to drive a speaker which is rated for 6/8 ohms. It is commonly used in toys, bells, alarm clocks etc. The features of the UM66 IC is given below

UM66 IC Features:

• Operating Voltage: 3.3N
  
• Current consumption: 1uA
  
• Supply voltage range: 0.3V to 3.5V
  
• Five different tones
  
• Each melody consists of 64 notes.
  
• Can easily drive a speaker through NPN Transistor
  

UM66 IC Applications:

• Frequently used in Toys, Calling Bells, Alarms etc.
• Use in hobby projects to make them more attractive using sound
• To notify users through a melody tone