TDA2579B

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 ...