ST STV6432 User Manual

Audio/video buffer and four-channel SD video filter

Features

2

■ I

C bus control

■ Video section:

– 7-MHz, low-pass filters on four encoder

video inputs
– DC-coupled inputs
– Each output is capable of driving an AC- or

DC-coupled, 150-Ω video load at 3 V pp

and CVBS output can drive a dual, 75-Ω

video load
– Fixed gain of 6 dB for each channel
– Selective video output muting

■ Audio section:

– Stereo sound capability
– Differential or single-ended audio inputs
– Audio outputs drive 2-kΩ loads at 3 V RMS
– Selectable audio gain of 0 to 28 dB
– Audio output muting
– 9 V to 12 V single supply operation
– Pop-noise suppression management

■ Low power mode

– Audio/video standby function

STV6432

Data brief

(28-pin v ery fine quad flat pack with exposed pad

Applications

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

■ Integrated digital TV plug-in

■ Blu-ray and DVD players

Description

The STV6432 is a fully integrated solution for
filtering and buffering standard-definition signals,
and buffering stereo audio signals from the MPEG
decoder of a digital receiver, Blu-ray or DVD
player, or iDTV plug-in.

VFQFPN-28 EPD 5× 5 × 1 mm3

down)

The STV6432 embeds four buffers with 7-MHz,
SD, low-pass filters, and a dual audio amplifier
that operates with either differential or
single-ended inputs.

Table 1. Device summary

Order code Temperature range Package Packaging

STV6432AJ 0 to 70 °C

STV6432AJT 0 to 70 °C

August 2011 Doc ID 019029 Rev 1 1/4

For further information contact your local STMicroelectronics sales office.

VFQFPN-28 (5 × 5 mm
EPD

VFQFPN-28 (5 × 5 mm
EPD

2

)

Tray

2

)

Tape and reel

www.st.com

4

Introduction STV6432

1 Introduction

The STV6432 is an I²C-controlled integrated circuit for filtering and buffering audio and
video signals in any consumer electronics application with SD outputs. It can be used in
products such as set-top boxes or DVD/BD players and recorders.

The STV6432 has a high level of integration and requires only the usual passive
components for decoupling and termination. The tiny package VFQFPN-28 ensures a small
footprint.

The STV6432 is one of the family of three, 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

DC-coupled video inputs. Reduces component count.
AC- and DC-coupled high-drive capability video

outputs (for 70-Ω (minimum) loads).

Smart pop-noise manager. Allows silent swap between active and standby

Selective standby command for audio or each
set of SD video outputs.

8-step selectable audio gain up to +28 dB,
supporting output of 3.1 V RMS (mi nimum).

Pin-compatibility with two other products. Combines single-device space-saving (up to 50%)

Pin-compatibility wit h STV6440AJ and
STV6437AJ.

Connects to any type of display and drives several
composite and RF modulator outputs without
external active components.

modes.
As low as 4-mW standby consumption supporting

compliance to 0.5-W standby requirements.
Easy fine-tune of THD and SNR depending on

requirements, whilst matching any specific audio
output level, including China Cable, and saving
external op-amps.

benefits with commodity price/flexibility benefits to
allow a single PCB design covering the entire
market spectrum.

Provides dual-source solution at no cost premium
in case of market shortage or sudden rise in
demand.

2/4 Doc ID 019029 Rev 1