ST STV6418 User Manual

STV6418

Audio/video switch and 6-channel SD/PS/HD video filter

Features

■I2C bus control

■Auto startup mode: low power consumption

■Video section:

–Three CVBS inputs, two CVBS outputs

–Three Y/C inputs, three Y/C outputs

–Switchable 8 MHz, 15 MHz or 30 MHz lowpass filters (LPF) on six inputs for standard definition, progressive scan and interleaved high definition, plus bypass (60 MHz) for progressive high definition

–Gain of 6 dB on all CVBS/Y and C outputs

–Integrated 150-Ω buffers

–Two RGB/one FB inputs, one high impedance RGB/FB output with 6-dB adjustable gain (from +3 dB to +9 dB)

–Two YPrPb inputs, one YPrPb/RGB HD output

–AC or DC-coupled video outputs

Data brief

TQFP48 (7 × 7 × 1 mm3) EPD

(48-pin thin quad flat pack with exposed pad down)

–Stereo-to-mono sound capability

–Differential or single-ended audio input

–Selectable gain of 0, 6 or 9 dB on one stereo input

–Full-range volume control with soft control

–Audio muting on all outputs

Applications

–Two slow blanking inputs/outputs

–Bottom clamp on all CVBS/Y and RGB inputs, average clamp on C inputs, synchronized clamp on PrPb inputs

■Set-top boxes (IP, cable, satellite, terrestrial)

■Integrated digital TV plug-in

■Blu-ray and DVD players

–Bi-directional control for VCR R/C output and for TV B output

–AC-coupled inputs and ACor DC-coupled inputs for video signal from encoder with internal clamp and bias

–Video detection block in low power auto startup mode

–Video muting on all outputs

■Audio section:

–Three stereo inputs, two stereo outputs

Table 1. Device summary

Description

The STV6418 is a highly integrated I2C buscontrolled 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.

The STV6418 provides fully integrated solutions for filtering and buffering both SD and HD signals.

Order code	Temperature range	Package	Packaging
STV6418AH	0 to 70 °C	TQFP48 EPD	Tray
STV6418AHT	0 to 70 °C	TQFP48 EPD	Tape and reel
September 2011	Doc ID 014824 Rev 2		1/4
For further information contact your local STMicroelectronics sales office.			www.st.com

Introduction	STV6418

1 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 middleto 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.

ACand DC-coupled video inputs.

ACand DC-coupled video outputs.

Audio gain up to +15dB.

Pin-compatibility with four other products.

Three selectable SD/HD filters and six independently-mutable RGB and component output buffers.

Auto startup mode.

Avoids video DAC change of output configuration.

Connects to any core chips on the market or reduces component count when using positive signals.

Connects to any type of display.

Allows optimization of THD and SNR, and saving external op-amps.

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.

Allows suppression of either SD/HD component output or SD SCART output when both are connected to the TV.

Implementing instantaneous SCART loop-through only when required while the STB is in standby, for significant power savings.

2/4	Doc ID 014824 Rev 2