GL6840
Block Diagram
7
Bridge
Diode
Overvoltage
Protection
Threshold
Detector
8
2
1
Sweep Frequency
Oscillator
Tone Generation
Oscillator
Output
Stage
5
6
3
4
Pin Description
PIN
1,8
NAME
LINE
DESCRIPTION
Input terminals to bridge diode. The AC ringing signal from the
telephone line drives the ringer through bridge.
Ground
This pin is connected to external capacitor to control the sweeping
frequency(f
SWEEP
)
2
GND
Sweep Rate
Control Capacitor
3
4
Output Frequency This pin is connected to external resistor to control the two tone
Control Resistor frequency(f
1
, f
2
)
Buzzer
Rectifier
Capacitor
The tone ringer output terminals which have inverse output phase
each others.
This pin is connected to external capacitor to change AC ringing
signal into DC voltage.
5,6
7
6
HYNIX [ HYNIX SEMICONDUCTOR ]
