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GS9090B Datasheet(PDF) 1 Page - Gennum Corporation |
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GS9090B Datasheet(HTML) 1 Page - Gennum Corporation |
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1 / 71 page  www.gennum.com GS9090B GenLINX® III 270Mb/s Deserializer for SDI GS9090B Data Sheet 40749 - 2 January 2007 1 of 71 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. |
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