GS9090

The GS9090 is a 270Mb/s reclocking deserializer with an internal FIFO. When used in conjunction with one of Gennum's SDI Cable Equalizers, a receive solution for SD-SDI and DVB-ASI applications can be realized.

In addition to reclocking and deserializing the input data stream, the GS9090 performs NRZI-to-NRZ decoding, descrambling as per SMPTE 259M-C, and word alignment when operating in SMPTE mode. When operating in DVB-ASI mode, the GS9090 will word alignthe data to K28.5 sync characters and 8b/10b decode the received stream.

The integrated reclocker features a very wide Input Jitter Tolerance, and is fully compatible with both SMPTE and DVB-ASI input streams.

The GS9090 includes a range of data processing functions such as error detection and correction, automatic standards detection, and EDH support. The GS9090 can also detect and extract SMPTE 352M payload identifier packets and independently identify the received video standard. This information is readfrom internal registers via the host interface port. TRS errors, EDH CRC errors, and ancillary data checksum errors can all be detected and corrected. A single DATA_ERROR pin of GS9090 is provided which is an inverted logical 'OR'ing of all detectable errors. Individual error status is stored in internal 'ERROR_STATUS' registers.

The GS9090 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 extraction. Parallel data outputs are provided in 10-bit multiplexed format, with the associated parallel clock output signal operating at 27MHz.

The GS9090 is Pb-free, and the encapsulation compound does not contain halogenated flame retardant (RoHS compliant).