GL6850
GL6850
TWO TONE RINGER
Description
The GL6850 tone ringer is a monolithic device,
which incorporates two oscillators, and output
amplifier and a power supply control circuit. The
oscillator frequencies can be adjusted over a wide
range by selection of external components. One
oscillator, normally operated at a low frequency,
causes the second oscillator to alternate between its
nominal frequency and a related higher frequency. The
resulting output is a distinct warbling tone. The output
amplifier will drive either a transformer coupled
loudspeaker or a piezo-ceramic transducer.
The device can be powered from a telephone line or
a fixed d.c. supply. The power control circuit has built-
in hysteresis to prevent false triggering and rotary dial
chirps. The GL6850 can be triggered externally under
logic control
.
Pin Configuration
VCC 1
TRIG_IN 2
8 OUTPUT
7 HIGHOSC_2
GL6850
LOWOSC_1 3
LOWOSC_2 4
6
5
HIGHOSC_1
GND
Features
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Low current consumption.
Designed for telephone bell replacement.
Small size MINIDIP package.
Adjustable 2- frequency tone.
Built-in hysteresis prevents false triggering and rotary dial CHIRPS.
Alarms or other alerting devices.
External triggering or ringer disable.
Include ESD protection.
Block Diagram
4
3
2
1
POWER SUPPLY
CONTROL CIRCUIT
(WITH HYSTERSIS)
LOW FREQUENCY
OSCILLATOR
HIGH FREQUENCY
OSCILLATOR
OUTPUT
AMPLIFIER
5
6
7
8
1
HYNIX [ HYNIX SEMICONDUCTOR ]
