GL6840

6

Block Diagram

Pin Description

Threshold

Detector

Sweep Frequency

Oscillator

Tone Generation

Oscillator

Output

Stage

Overvoltage

Protection

Bridge

Diode

8

1

3

4

5

6

7

2

PIN

NAME

DESCRIPTION

1,8

LINE

Input terminals to bridge diode. The AC ringing signal from the

telephone line drives the ringer through bridge.

2

GND

Ground

3

Sweep Rate

Control Capacitor

This pin is connected to external capacitor to control the sweeping

4

Output Frequency

Control Resistor

This pin is connected to external resistor to control the two tone

5,6

Buzzer

The tone ringer output terminals which have inverse output phase

each others.

7

Rectifier

Capacitor

This pin is connected to external capacitor to change AC ringing

signal into DC voltage.