GENERAL DESCRIPTION
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