Description
The STV6412A is a highly integrated I²C bus-controlled audio and video switch matrix, optimized for use in digital set-top box applications. It provides all the audio and video routings required in a full two SCART set-top box design.

Features
■ I²C bus control
■ Standby mode with interrupt signal output
■ Video section
    – 4 CVBS inputs, 3 CVBS outputs (one with selectable chroma trap filter)
    – 3 Y/C inputs, 2 Y/C outputs
    – 6 dB gain on all CVBS/Y and C outputs
    – Integrated 150 Ω buffers
    – 1 Y/C adder
    – 2 RGB/FB inputs, 1 tri-state RGB/FB output with 6 dB adjustable gain (from +3dB to +9dB)
    – Video muting on all outputs
    – 2 slow blanking inputs/outputs
    – Sync bottom clamp on all CVBS/Y and RGB inputs, average clamp on C Inputs
    – Bandwidth: 15 MHz
    – Crosstalk: 50 dB minimum
■ Audio Section
    – 4 stereo inputs, 3 stereo outputs
    – 1 mono-sound output
    – stereo-to-mono sound capability
    – 0/6/9 dB selectable gain on one stereo input
    – Full range volume control with soft control
    – Audio muting on all outputs