UM3561 Three siren sound generator

Description of product

UM3561 - Three Siren Sound Generator

UM3561 is a low-cost, low-power CMOS LSI designed for use in alarm and toy applications. Since the integrated circuit includes oscillator and selector circuits, a compact sound module can be constructed with only a few additional components. The M3561 contains a programmed mask ROM to simulate siren sound.


  • Four sounds can be selected
  • Power on reset.
  • Typical 3V operating voltage
  • A magnetic speaker can be driven by connecting 
  • 8-pin DIP package form an NPN transistor

* Image shown is a representation only.