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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
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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
Page 3
STV6432 Revision history
Figure 1. Pin-compatible devices
Analog
audio/video
outputs
Set-top box
market segments
High-end
HD
Mid-range
Low-end
High-end
SD
Mid-range
Low-end
PbPr Y
LRCVBSLRCVBS LRCVBS
STV6418AH
STV6417AG
STV6430AGSTV6419AG
Pin-compatible ICs
LQFP-48 / TQFP-48 exposed pad
PbPr Y
LRCVBS
STV6437BH
PbPr Y
LR CVBS CVBS
STV6440AJ
STV6437AJ
STV6432AJ
Pin-compatible ICs
QFN25 5x5
S-Video
LR
2 Revision history
Table 2. Document revision history
Date Revision Changes
12-Aug-2011 1 Initial release.
Doc ID 019029 Rev 1 3/4
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STV6432
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