TARGET SPECIFICATION

STV6433

Filtered Video Buffers for STB and DVD Devices

®

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

September 2003

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FEATURES

s Y, C Inputs with 7.1 MHz filters

s 40 dB Stop Band Attenuation at 27 MHz

s RF Signal with 14 dB Notch Filter at 4.5 MHz

for Sound Trap

s RF Signal with -170 ns Differential Group

Delay between 400 kHz and 3.58 MHz

s 6 dB Gain

s Capabilities of Integrated Output Buffers:

Double-adapted Loads (75

Ω) on CVBS

Output, Single-adapted Loads on Y and C

Outputs

s AC-coupled Inputs

s DC-coupled Outputs for Y, CVBS and RFOUT

s DC- or AC-coupled Output for COUT

s Bottom Clamp on Y, Bias Clamp on C

s Crosstalk: 55 dB (typical)

DESCRIPTION

The STV6433 is a filtered video output interface for DVD, Satellite and Cable Set-Top Box applications.

After removing D/A conversion noise using integrated low pass filters, the STV6433 adapts the Y and C

signals coming from the digital decoder in amplitude and impedance for transmission to the TV set and an

auxiliary device (VCR, DVD recorders, etc.) via adapted 75-ohm cables.

A Y+C adder with buffer for providing a CVBS signal to external loads and a pre-processing of a CVBS

signal for RF modulator (RFOUT) are included in STV6433.

This pre-processing is a notch filtering at 4.5 MHz (before the addition of the audio signal in the RF

modulator) and a 170 ns Y/C delay (to compensate the nominal distorsion in the TV IF filter).

The STV6433 is powered by a 5V voltage supply and is fully-compatible with STi55xx digital encoders.

Order Code: STV6433

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