Introduction

STV6418

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Doc ID 014824 Rev 2

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Introduction

The STV6418 is an I²C-controlled integrated circuit for switching, filtering and buffering

audio and video signals in any dual, full-SCART application with HD component output. It

can be used in products such as HD set-top boxes or DVD/BD players and recorders for

European markets.

It can be connected to six video DAC outputs of an MPEG decoder, allowing simultaneous

switching and driving of either the composite and RGB signals, or the S-video signal only, to

the TV SCART output, as well as the composite or S-video signals to the VCR SCART

output, and the HD component output to RCA HD sockets. Further, the device provides the

switching of the composite and RGB signals, or the S-video signal only, from the VCR

SCART to the TV SCART.

The STV6418 manages the slow blanking and fast blanking signalling through the I²C bus.

The complete set of features of the STV6418 makes it particularly adapted for all middle- to

high-end European HD set-top boxes offering an HD component output as an HD back-up

solution to HDMI potential interoperability issues between source and sink.

The STV6418 is one of the family of five, pin-compatible products (Figure 1) that complete

the new generation of audio and video switches and buffers from STMicroelectronics.

Together they cover, both technically and price-wise, the whole market spectrum from

mid-range SD retail (zapper set-top boxes or basic recorders) up to DVR HD operators

(set-top boxes or recorders with HD component output).

Features

Benefits

Integrated switch from RGB/Composite SCART

to S-video SCART.

Avoids video DAC change of output configuration.

AC- and DC-coupled video inputs.

Connects to any core chips on the market or

reduces component count when using positive

signals.

AC- and DC-coupled video outputs.

Connects to any type of display.

Audio gain up to +15dB.

Allows optimization of THD and SNR, and saving

external op-amps.

Pin-compatibility with four other products.

Combines single-device space-saving (up to 50%)

benefits with commodity price/flexibility benefits to

allow a single PCB design covering the entire

market spectrum.

Three selectable SD/HD filters and six

independently-mutable RGB and component

output buffers.

Allows suppression of either SD/HD component

output or SD SCART output when both are

connected to the TV.

Auto startup mode.

Implementing instantaneous SCART loop-through

only when required while the STB is in standby, for

significant power savings.