Description

The STV6412B 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.

In an LQFP64 (14 × 14 × 1.4 mm) package, the STV6412B is compatible with the STV6412A.

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

– Switchable LPFs (low pass filters) on 6 inputs

– 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 +3 dB to +9 dB)

– 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

– SVHS switch on C VCR output

– 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