Philips TDA2579b free download

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INTEGRATED CIRCUITS DATA SHEET TDA2579B Horizontal/vertical synchronization circuit Preliminary specification File under Integrated Circuits, IC02 September 1990 Philips Semiconductors Preliminary specification Horizontal/vertical synchronization circuit GENERAL DESCRIPTION TDA2579B The TDA2579B generates and synchronizes horizontal and vertical signals. The device has a 3 level sandcastle output; a transmitter identification signal and also 50/60 Hz identification. Features · Horizontal phase detector, (sync to oscillator), sync separator and noise inverter · Triple current source in the phase detector with automatic selection · Second phase detector for storage compensation of the horizontal output · Stabilized direct starting of the horizontal oscillator and output stage from mains supply · Horizontal output pulse with constant duty cycle value of 29 µs · Internal vertical sync separator, and two integration selection times · Divider system with three different reset enable windows · Synchronization is set to 628 divider ratio when no vertical sync pulses and no video transmitter is identified · Vertical comparator with a low DC feedback signal · 50/60 Hz identification output combined with mute function · Automatic amplitude adjustment for 50 and 60 Hz and blanking pulse duration · Automatic adaption of the burst-key pulsewidth PACKAGE OUTLINE 18-lead dual in line; plastic (SOT 102); SOT102-1; 1996 November 19. September 1990 2 Philips Semiconductors Preliminary specification Horizontal/vertical synchronization circuit QUICK REFERENCE DATA PARAMETER Supply Minimum required current for starting horizontal oscillator and output stage Main supply voltage Supply current Input signals Sync pulse input amplitude Horizontal flyback pulse input current Vertical comparator input signal Voltage AC Voltage DC Output signals Horizontal output (open collector) I11 = 25 mA Vertical output stage driver (emitter follower) I1 = 1.5 mA Sandcastle output levels V17 burst-key horizontal blanking vertical blanking Video transmitter identification output stage (open collector loaded with external resistor to positive supply). No sync. pulse present Sync pulse present divider ratio > 576 divider ratio < 576 V13 V13 - - V10 7.65 V13 I13 - - - - V17 V17 V17 9.8 - - - 4.5 2.5 V1 5 - V11 - - V2 V2 - - 0.8 1 V5(p-p) I12 0.05 - - 1 I16 V10 I10 6.2 - - - 12 70 CONDITION SYMBOL MIN. TDA2579B TYP. MAX. UNIT - - - mA V mA 1.0 - - - V mA V V 0.5 - - - - 0.5 5 - - V V V V V V mA V V September 1990 3 Philips Semiconductors Preliminary specification Horizontal/vertical synchronization circuit TDA2579B September 1990 4 Fig.1 Block diagram. Philips Semiconductors Preliminary specification Horizontal/vertical synchronization circuit FUNCTIONAL DESCRIPTION Vertical part (pins 1,2,3,4) TDA2579B The IC embodies a synchronized divider system for generating the vertical sawtooth at pin 3. The divider system has an internal frequency doubling circuit,