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Low-cost audio/video switch and 4-channel SD video filter
Features
2
■ I
C bus control
■ Interrupt signal output
■ Video section:
– Three CVBS inputs; two CVBS outputs
– Two RGB or YPrPb or chroma / one FB
input; one RGB or YPrPb or chroma / one
FB output
– 7-MHz low-pass filters on four encoder
inputs
– Gain of 6 dB on all RGB and CVBS outputs
– Integrated 150-Ω buffers
– Capabilities of integrated output buffers:
– CVBS_TV can drive two standard 150-Ω
video loads
– CVBS_VCR can drive one standard
150-Ω video load and one 600-Ω modulator
load
– RGB can drive a standard 150-Ω video
load
– AC- or DC-coupled video outputs
– Two slow blanking inputs/outputs
– Bottom clamp on all CVBS and
bottom/average/synchronized clamp on
RGB inputs
– AC-coupled inputs for all video signal
– Crosstalk: 50 dB minimum
■ Audio section:
– Three inputs; two outputs
– Stereo sound capability
– One mono sound output
– Differential or single-ended audio encoder
input
Table 1. Device summary
STV6419
Data brief
– Selectable gain on one stereo input
– Audio muting on the output
– Audio outputs drive 3.1 V RMS into 2 kΩ
– Full-range volume control with soft control
– Audio BSkyB compatible
Applications
■ Set-top boxes (IP, cable, satellite, terrestrial)
■ Integrated digital TV plug-in
■ Blu-ray and DVD players
Description
The STV6419 is a highly integrated I2C buscontrolled audio and video switch matrix,
optimized for use in digital set-top box or DVD
recorder applications. It provides the audio and
video routings (CVBS and RGB) required in a
non-full two SCART set-top box design.
The STV6419 is a fully integrated solution for
filtering and buffering SD signals.
LQFP48 7 × 7 × 1.4 mm3
(48-pin low-profile quad flat pac k)
Order code Temperature range Package Packaging
2
STV6419AG 0 to 70 °C LQFP48 (7 × 7 mm
STV6419AGT 0 to 70 °C LQFP48 (7 × 7 mm
October 2011 Doc ID 014825 Rev 1 1/4
For further information contact your local STMicroelectronics sales office.
)Tray
2
) Tape and reel
www.st.com
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Introduction STV6419
1 Introduction
The STV6419 is an I2C-controlled integrated circuit for switching, filtering and buffering
audio and video signals in any dual, non-full SCART application. It can be used in products
such as SD and HD set-top boxes or DVD/BD players and recorders for European markets.
It can be connected to four video DAC outputs of an MPEG decoder, allowing simultaneous
switching and driving of the composite and RGB signals, or the S-video signal only, to the
TV SCART output, as well as the composite signal to the VCR SCART output. Further, the
device provides the switching of the composite and RGB signals, or the S-video signals
only, from the VCR SCART to the TV SCART.
The STV6419 manages the slow blanking and fast blanking signalling through the I
The STV6419 provides the minimum required set of features to support the dual-SCART
connector with significant cost reduction over existing solutions (such as STV6417 or
competition) and in line with a price-sensitive, soon-to-be-phased-out legacy topology, for
which set-top box manufacturers are no longer willing to pay a premium.
The STV6419 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 SD component output).
Features Benefits
2
C bus.
DC-coupled video inputs. Reduces component count.
AC- and DC-coupled high-drive capability video
outputs (for 70-Ω (minimum) loads).
8-step selectable audio gain up to +28 dB,
supporting output of 3.1 V RMS (mi nimum).
Pin-compatibility with four other products. Combines single-device space-saving (up to 50%)
Pin-compatibility with STV6417AH. Provides dual-source solution at no cost premium
Pin-compatibility with STV6418AH. Provides dual-source solution at no cost premium
Connects to any type of display and drives several
composite and RF modulator outputs without
external active components.
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.
in case of market shortage or sudden rise in
demand.
in case of market shortage or sudden rise in
demand.
2/4 Doc ID 014825 Rev 1
Page 3
STV6419 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
STV6419AG
PbPr Y
LRCVBSLRCVBS LRCVBS
STV6418AH
STV6417AG
STV6430AG
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
06-Oct-2011 1 Initial release.
Doc ID 014825 Rev 1 3/4
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STV6419
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