GS1572 Datasheet, PDF (1/64 Pages) Gennum Corporation – EDH packet generation and insertion

GS1572 Multi-Rate Serializer with Cable Driver and ClockCleaner^TM
Key Features
• HD-SDI, SD-SDI, DVB-ASI transmitter
• Integrated SMPTE 292M and 259M-C compliant cable
driver
• Integrated ClockCleaner^™
• User selectable video processing features, including:
Š Generic ancillary data insertion
Š Support for HVF or EIA/CEA-861 timing input
Š Automatic standard detection and indication
Š Enhanced SMPTE 352M payload identifier
generation and insertion
Š TRS, CRC, ANC data checksum, and line number
calculation and insertion
Š EDH packet generation and insertion
Š Illegal code remapping
Š SMPTE 292M and SMPTE 259M-C compliant
scrambling and NRZ → NRZI encoding
Š Blanking of input HANC and VANC space
• JTAG test interface
• 1.8V core and 3.3V charge pump power supply
• 1.8V and 3.3V digital I/O support
• Low power standby mode
• Operating temperature range: -20^oC to +85^oC
• Pb-free, RoHS compliant, 11mm x 11mm 100-ball BGA
package
Applications
• SMPTE 292M and SMPTE 259M-C Serial Digital
Interfaces
• DVB-ASI Serial Digital Interfaces
Description
The GS1572 is the next generation multi-standard
serializer with an integrated cable driver. The device
provides robust parallel to serial conversion, generating a
SMPTE 292M/259M-C compliant serial digital output
signal. The integrated cable driver features an output
disable (high-impedance) mode and an adjustable signal
swing. Data input is accepted in 20-bit parallel format or
10-bit parallel format. An associated parallel clock input
must be provided at the appropriate operating frequency -
74.25/74.1758/13.5MHz (20-bit mode) or
148.5/148.352/27MHz (10-bit mode).
The GS1572 features an internal PLL which, if desired, can
be configured for a loop bandwidth below 100kHz. When
used in conjunction with the GO1555 Voltage Controlled
Oscillator, the GS1572 can tolerate well in excess of 300ps
jitter on the input PCLK and still provide output jitter within
SMPTE specifications.
In addition to serializing the input, the GS1572 performs
NRZ-to-NRZI encoding and scrambling as per SMPTE
292M/259M-C when operating in SMPTE mode. When
operating in DVB-ASI mode, the device will insert K28.5
sync characters and 8b/10b encode the data prior to
serialization. The device also provides a range of other data
processing functions. All processing features are optional
and may be enabled/disabled via external control pin(s)
and/or host interface programming.
Typical power consumption, including the GO1555 VCO, is
440mW. The standby feature allows the power to be
reduced to 125mW. Power may be reduced to less than
10mW by also removing the power to the cable driver and
eliminating transitions at the parallel data and clock inputs.
The GS1572 is Pb-free and RoHS compliant.
GS1572 Multi-Rate Serializer with Cable Driver and
ClockCleaner^TM
Data Sheet
44262 - 4
March 2009
www.gennum.com
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