Description
The GS1531 is a multi-standard serializer with an integrated cable driver. When used in conjunction with the GO1555/GO1525* Voltage Controlled Oscillator, a transmit solution can be realized for HD-SDI, SD-SDI and DVB-ASI applications.
The device features an internal PLL, which can be configured for loop bandwidth as narrow as 100kHz. Thus the GS1531 can tolerate in excess of 300ps jitter on the input PCLK and still provide output jitter well within SMPTE specification. Connect the output clocks from Gennum’s GS4911 clock generator directly to the GS1531’s PCLK input and configure the GS1531’s loop bandwidth accordingly.

Key Features
• SMPTE 292M and SMPTE 259M-C compliant scrambling and NRZ → NRZI encoding (with bypass)
• DVB-ASI sync word insertion and 8b/10b encoding
• Rejection of more than 300ps jitter on the input PCLK
• User selectable additional processing features including:
• CRC, ANC data checksum, and line number calculation and insertion
• TRS and EDH packet generation and insertion
• illegal code remapping
• Internal flywheel for noise immune TRS generation
• 20-bit / 10-bit CMOS parallel input data bus
• 148.5MHz / 74.25MHz / 27MHz / 13.5MHz parallel digital input
• Automatic standards detection and indication
• 1.8V core power supply and 3.3V charge pump power supply
• 3.3V digital I/O supply
• JTAG test interface
• Available in a Pb-free package
• small footprint (11mm x 11mm)

Applications
• SMPTE 292M Serial Digital Interfaces
• SMPTE 259M-C Serial Digital Interfaces
• DVB-ASI Serial Digital Interfaces