GL6850 Datasheet, PDF (1/3 Pages) Hynix Semiconductor – TWO TONE RINGER

GL6850
GL6850
TWO TONE RINGER
Description
Pin Configuration
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.
VCC 1
TRIG_IN ₂
LOWOSC_1 ₃
LOWOSC_2 4
Features
• 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.
GL6850
8 ^OUTPUT
7 HIGHOSC_2
6 HIGHOSC_1
5 GND
Block Diagram
4
3
2
1
POWER SUPPLY
CONTROL CIRCUIT
(WITH HYSTERSIS)
LOW FREQUENCY
OSCILLATOR
HIGH FREQUENCY OUTPUT
OSCILLATOR
AMPLIFIER
5
6
7
8
1