GL6851 Datasheet | SK Hynix

Description The GL6851 tone ringer is a monolithic device, which incorporates two oscillators, an output amplifier and a power supply control circuit. The oscillator frequencies can be adjusted over a wide range by selection of external ponents. 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 GL6851 has provision for adjustment of the supply initiation current. Pin Configuration VCC 1 RSL 2 8 OUTPUT 7 HIGHOSC_2 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. Adjustable for reduced supply initiation current Include ESD protection. Block Diagram 4 3 2 1 POWER SUPPLY CONTROL CIRCUIT (WITH HYSTERESIS) LOW FREQUENCY OSCILLATOR HIGH FREQUENCY OSCILLATOR OUTPUT AMPLIFIER Absolute Maximum Ratings (Ta = 25¡ É ) CHARACTERISTICS Supply Voltage Power Dissipation Operating Temperature Storage Temperature SYMBOL VCC Po Topr Tstg VALUE 30 400 -25 to 65 -65 to 150 UNIT V m W ¡ É ¡ É Electrical Characteristics (Ta = 25¡ É ) CHARACTERISTICS Operating Supply Voltage Initiation Supply Voltage1 Initiation Supply Current1 Sustaining Voltage2 Sustaining Current2 Output Voltage High Output Voltage Low SYMBOL VCC VSI ISI VSUS ISUS VOH VOL f H1 High Frequency 1 High Frequency 2 Low Frequency f H2 f L R3=191K,C3=6800p F R3=191K,C3=6800p F R2=165K,C2=0.47µF 461 576 9.0 512 640 10 563 704 11.0 Hz Hz Hz TEST CONDITION MIN 17 0.9 9.7 0.4 17 TYP 19 2.0 11.0 1.0 19 MAX 29.0 21 3.7 12.0...