UM3561 Siren Sound Generator IC Pinout, Working, and Parameters
Hello friends! Welcome back to ElectroDuino. This blog is base on the UM3561 Siren Sound Generator IC Pinout, Working, and Parameters. Here we will discuss the Introduction to UM3561 IC, Pin Diagram, Working Principle of LM339 IC, Features, and its Applications.
Introduction
The UM3561 is one type of low-cost ROM (Read Only Memory) IC, that can produce different siren tones like Ambulance, Police, machine gun, and Fire brigade siren sound. This is an 8 pin low power IC, it has an inbuilt oscillator and tone selection pins. The UM3561 IC typical operating voltage is 3V and the Operating Current Idd is 150μA. The output current of this IC Io/p 3mA. This IC mainly designed for making toys and sirens.
UM3561 Siren Sound Generator IC Pinout/Pin Diagram
| Pin No | Pin Name | Description |
| 1 | SEL 2 | Selection of sound effect pin-2 |
| 2 | Vss/GND | Ground pin of the IC for negative (-ve) power input |
| 3 | OUTPUT | The output pin generates a mono-tone sound |
| 4 | NC | The NC pin may have an internal function, but it does not have any external functions. So, leave it open for normal operations. |
| 5 | Vdd/Vcc | Vcc pin of the IC for positive (+ve) power input |
| 6 | SEL 1 | Selection of sound effect pin-1 |
| 7 | OSC 1 | External oscillator terminal 1 |
| 8 | OSC 2 | External oscillator terminal 2 |
Working Principle Block Diagram of IC UM3561
Here we will learn step by step what is the working principle is going on Inside the UM3561 using a block diagram. Inside the IC, UM3561 IC has an oscillator circuit, which generates oscillations frequency, this frequency is controlled by the external resistor connected between the OSC 1(Pin 7) and OSC2 (Pin 8). This oscillation frequency will be moved to a control circuit. The working of the control circuit can be depending on the tone selection through the SEL 1 (Pin 6) and SEL 2 (Pin 1). Then the control circuit passes the signal to the address counter. Then the address counter passes the signal to the ROM. Finally, the tone pulses are generated, which will be available at the output pin (pin 3).
UM3561 IC Specifications
| Parameter | Value |
| Operating voltage (Vdd) | Min-2.4V, Max-3.6V, and Typical-3V |
| Operating Current (Idd) | 150µA |
| DC Supply voltage range | 3.0 to +5.0V |
| Input/Output voltage (Vss) | 3.0V to VDD +3.0V |
| Frequency Stability ∆F/F | Maximum 20% @ Fosc(3.3V)-Fosc(2.7V)/Fosc(2.7V) @ VSS = 0V, TA=25°C, FOSC = 106496 Hz |
| Ambient operating temperature | -10°C to 60°C |
| The temperature for storage | -55°C to 125°C |
Features of IC UM3561
- 4-sounds can be chosen
- Power on RST (reset)
- Operating voltage is 3V
- A magnetic speaker can be driven by connecting
- Low-cost
- Low-power CMOS LSI used in alarm and toy applications.
Applications
- Generating a siren sound
- Sounds based toys applications
- Alarm
- Generate four different types of siren sounds like a toy machine gun sound, ambulance, police, and fire brigade siren.
