UM3561 Features
The features of UM3561 are as follows:
- Enables you to generate four different types of sounds.
- Provides monotone output along with fast test capability.
- DC voltage supply range is -3V to +5V but typically 3V is applied for normal operation.
- Output voltage range = -3V to +3V.
- The value of the operating current is 150 µA and the output current is 3 mA.
- The chip has a power-on reset ability due to which it starts in the same condition on powering IC.
- It has a magnetic speaker which can be driven by connecting an NPN transistor.
- The ambient operating temperature range is -10°C to 60°C.
Where to use it?
A simple audio circuit can be designed using only a few external components along with this chip. The UM3561 IC is a three-siren sound generator that can work down to 2.4 Volts. It is designed for use in alarm applications and toys. You can create circuits for ambulance sirens or Police sirens etc. If you are designing an alarm or a siren circuit, then you can use this IC.
How to use Sound Generator UM3561?
UM3561 IC generates a multitone output signal. Pin7 and piN8 control the frequency of the internal oscillator by connecting an external resistor between these two pins. A 220 kΩ resistor is normally used between these two pins. These oscillations are then transferred to the control circuit which selects a tone based on the inputs of pin6 and pin2 select pins. Then the control circuit will pass this signal to the address counter from the address counter to ROM and then to an output pin. An NPN transistor is usually connected at the output to amplify the sound since the signal is feeble.
