Outline

This is an NTSC/PAL signal switching IC.

In PAL conversion mode, a frequency-converted (fc=4.43MHz) NTSC format chroma signal is phase converted (R-Y axis component is inverted) every 1 hour by shifting burst signal phase by 45°.

Circuit configuration includes VCO (horizontal sync), VCXO (phase conversion carrier), phase conversion circuit, switches, amps, etc.

Features

1. PAL conversion with phase conversion performed

2. Two possible phase conversion carriers : crystal oscillation and external input

3. No adjustments

4. Four possible mode selections by CTL and EXT pins

Applications

1. VCR