View tda4570 cnv 2 datasheet:

INTEGRATED CIRCUITS DATA SHEET TDA4570 NTSC decoder August 1986 Product specification File under Integrated Circuits, IC02 Philips Semiconductors Product specification NTSC decoder TDA4570 GENERAL DESCRIPTION The TDA4570 is an integrated 3,58 MHz or 4,43 MHz NTSC decoder. It is pin sequence compatible with multi-standard decoder TDA4555 and pin compatible with the PAL decoder TDA4510. Features Chrominance part • Gain controlled amplifier with operating point control stage • ACC (automatic chrominance control) with sampled rectification during burst-key signal • Blanking circuit for the colour burst signal Oscillator and control voltage part • Voltage controlled reference oscillator for double subcarrier frequency • Divider stages which provide the correct 90° phase betw