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STV6419-STV6419AG
Low-cost audio/video switch and 4-channel SD video filter
Data briefOctober 2011 Doc ID 014825 Rev 1 1/4
STV6419Low-cost audio/video switch and 4-channel SD video filter
FeaturesI2 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 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
DescriptionThe STV6419 is a highly integrated I2 C bus-
controlled 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.
Table 1. Device summary
Introduction STV64192/4 Doc ID 014825 Rev 1
1 IntroductionThe STV6419 is an I2 C-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 I2 C bus.
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).
DC-coupled video inputs. Reduces component count.
AC- and DC-coupled high-drive capability video
outputs (for 70-Ω (minimum) loads).
Connects to any type of display and drives several
composite and RF modulator outputs without
external active components.
8-step selectable audio gain up to +28 dB,
supporting output of 3.1 V RMS (minimum).
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.
Pin-compatibility with four other products. Combines single-device space-saving (up to 50%)
benefits with commodity price/flexibility benefits to
allow a single PCB design covering the entire
market spectrum.
Pin-compatibility with STV6417AH. Provides dual-source solution at no cost premium
in case of market shortage or sudden rise in
demand.
Pin-compatibility with STV6418AH. Provides dual-source solution at no cost premium
in case of market shortage or sudden rise in
demand.
STV6419 Revision historyDoc ID 014825 Rev 1 3/4
2 Revision history
Table 2. Document revision history
STV64194/4 Doc ID 014825 Rev 1
This datasheet has been :
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