GENERAL DESCRIPTION
The TDA3504 is an integrated circuit which performs video control functions in a PAL/SECAM decoder for negative colour difference signals−(R−Y) and−(B−Y).

FEATURES
• Capacitive coupling of the colour difference and luminance input signals with black level clamping in the input stages
• Linear saturation control acting on the colour difference signals
• (G−Y) and RGB matrix
• Linear transmission of inserted signals
• Equal black levels for inserted and matrixed signals
• 3 identical channels for the RGB signals
• Linear contrast and brightness controls, operating on both the inserted and matrixed RGB signals
• Clamping, horizontal and vertical blanking of the three input signals controlled by a 3-level sandcastle pulse
• Emitter-follower outputs for driving the RGB output stages.