Rato
Features
Low Operating Voltage 2V ~ 5V
CMOS process
On-Chip RC oscillator
Low stand by current
2 seconds SOFT CHIRP
RT0103
The RT0103 is a CMOS Design for single tone alarm sound application. The SOFT
CHIRP only be generated within 200 seconds of the first sound.
Pin Diagram
OSC2
OSC1
INI
GND
1
2
3
4
8
7
6
5
SOFTB
VCC
BZ2
BZ1
RT0103
Pin Out And Description
Symbol
OSC2
OSC1
INI
GND
BZ1
BZ2
VCC
SOFTB
Description
Oscillator pin
Oscillator pin
An internal pull-up resistor. Might disable BZ1,
BZ2 when connected to GND.
Ground
Audio output
Audio output
Power
Vcc = Single Tone
Open = Single Tone with 2 seconds soft chirp.
Pin
1
2
3
4
5
6
7
8
I/O
I
O
I
O
O
I
Electrical Characteristics
Parameter
Operating Voltage
Stand-By Current
Operating Current
BZ1, BZ2
Driving Current
Operating Frequency
Symbol
Vcc
Isb
Iop
Ioh
Iol
Fop
Min.
2.0
1.0
1.0
Vcc=3V , Temp.=25
Max.
Unit
Typ.
V
3.0
5.0
uA
30
50
uA
300
500
mA
mA
KHz
128
Absolute Maximum Ratings
Symbol
Vcc
Vi
Vo
Tst
Ttp
2000.04.11
Parameter
Supply Voltage
Input Voltage
Output Voltage
Storage Temperature
Operating Temperature
Rating
-0.3 ~ 6
-0.3 ~ Vcc +0.3
-0.3 ~ Vcc +0.3
-40 ~125
0 ~ 65
Unit
V
V
V
Single Tone Siren/Alarm Sound Generator with SOFT chirp
1
1
