GS9090B Datasheet, PDF (1/71 Pages) Gennum Corporation – GenLINX® III 270Mb/s Deserializer for SDI

GS9090B GenLINX® III
270Mb/s Deserializer for SDI
GS9090B Data Sheet
Key Features
• SMPTE 259M-C compliant descrambling and NRZI
to NRZ decoding (with bypass)
• DVB-ASI sync word detection and 8b/10b decoding
• Integrated line-based FIFO for data
alignment/delay, clock phase interchange, DVB-ASI
data packet extraction and clock rate interchange,
and ancillary data packet extraction
• Integrated VCO and reclocker
• Automatic or manual selection between SMPTE
video and DVB-ASI data
• User selectable additional processing features
including:
• TRS, ANC data checksum, and EDH CRC error
detection and correction
• programmable ANC data detection
• illegal code remapping
• Internal flywheel for noise immune H, V, F
extraction
• Automatic standards detection and indication
• Enhanced Gennum Serial Peripheral Interface
(GSPI)
• JTAG test interface
• Polarity insensitive for DVB-ASI and SMPTE
signals
• +1.8V core power supply with optional +1.8V or
+3.3V I/O power supply
• Small footprint (8mm x 8mm)
• Low power operation (typically 145mW)
• Pb-free
Applications
• SMPTE 259M-C Serial Digital Interfaces
• DVB-ASI Serial Digital Interfaces
Description
The GS9090B is a 270Mb/s reclocking deserializer with
an internal FIFO. It provides a complete receive solution
for SD-SDI and DVB-ASI applications.
In addition to reclocking and deserializing the input data
stream, the GS9090B performs NRZI-to-NRZ decoding,
descrambling as per SMPTE 259M-C, and word align-
ment when operating in SMPTE mode. When operating
in DVB-ASI mode, the device will word align the data to
K28.5 sync characters and 8b/10b decode the received
stream.
The internal reclocker features a very wide input jitter
tolerance, and is fully compatible with both SMPTE and
DVB-ASI input streams.
The GS9090B includes a range of data processing
functions such as EDH support (error detection and
handling), and automatic standards detection. The de-
vice can also detect and extract SMPTE 352M
payload identifier packets and independently identify
the received video standard. This information is read
from internal registers via the host interface port.
The GS9090B also incorporates a video line-based
FIFO. This FIFO may be used in four user-selectable
modes to carry out tasks such as data alignment / delay,
clock phase interchange, MPEG packet extraction and
clock rate interchange, and ancillary data packet extrac-
tion.
Parallel data outputs are provided in 10-bit multiplexed
format, with the associated parallel clock output signal
operating at 27MHz.
The device may also be used in a low-latency data pass
through mode where only descrambling and word align-
ment will be performed in SMPTE mode.
40749 - 2 January 2007
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