TDA2579C Datasheet | NXP Semiconductors

FEATURES Synchronization and horizontal part - Horizontal sync separator and noise inverter - Horizontal oscillator - Horizontal output stage - Horizontal phase detector (sync to oscillator) - Triple current source in the phase detector with automatic selection - Normal phase detector time constant is increased to fast during the vertical blanking period (external switching for VTR conditions not necessary) - Slow phase detector time constant and gated sync pulse operation are automatically switched on by an internal sync pulse noise level detection circuit - Fast phase detector time is switched on for locking - Time constant externally switchable - Inhibit of horizontal phase detector and video transmitter identification circuit during equalizing pulses and vertical sync pulse - Inhibit of horizontal phase detector during separated vertical sync pulse - Second phase detector for storage pensation of the line output stage - 3-level sandcastle pulse generator - Automatic adaption of the burst key pulse width - Video transmitter identification circuit - Stabilizer and supply circuit for starting the horizontal oscillator and output stage directly from the mains rectifier - Horizontal output current with constant duty factor value of 55% - Duty factor of the horizontal output pulse is 55% when the horizontal flyback pulse is absent. GENERAL DESCRIPTION Vertical part - f V = 60 Hz (M) system - Vertical synchronization pulse separator without external ponents and two integration times - Zener diode reference voltage source for the vertical sawtooth generator and vertical parator - Divider system with three different reset enable windows - Synchronization is set to 528 divider ratio when no vertical sync pulse and no video transmitter is identified - Divider window is forced to wide window when a vertical sync pulse is detected within the window provided by reset divider and end of vertical blanking period, on condition that the voltage on pin 18 is ≤1.2 V -...