GL6850

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 builtin 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 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 GL6850 Absolute Maximum Ratings (Ta = 25¡ É ) CHARACTERISTICS Supply Voltage Power Dissipation...