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Audio/video switch and 6-channel SD/PS/HD video filter
Features
2
■ I
C 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 low-
pass filters (LPF) on six inputs for standard
definition, progressive scan and interleaved
high definition, plus bypass (60 MHz) for
progressive high defin ition
– 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
– Two slow blanking inputs/outputs
– Bottom clamp on all CVBS/Y and RGB
inputs, average clamp on C inputs,
synchronized clamp on PrPb inputs
– Bi-direction al control for VCR R/C output
and for TV B output
– AC-coupled inputs and AC- or 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
STV6418
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
■ Set-top boxes (IP, cable, satellite, terrestrial)
■ Integrated digital TV plug-in
■ Blu-ray and DVD players
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
4
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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 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.
AC- and DC-coupled video inputs. Connects to any core chips on the market or
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
Pin-compatibility with four other products. Combines single-device space-saving (up to 50%)
Three selectable SD/HD filters and six
independently-mutable RGB and component
output buffers.
Auto startup mode. Implementing instantaneous SCART loop-through
Avoids video DAC change of output configuration.
reduces component count when using positive
signals.
external op-amps.
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.
only when required while the STB is in standby, for
significant power savings.
2/4 Doc ID 014824 Rev 2
Page 3
STV6418 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
27-Jun-2008 1 Initial release.
23-Sep-2011 2 Updated with new presentati on.
Doc ID 014824 Rev 2 3/4
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STV6418
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4/4 Doc ID 014824 Rev 2
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