Octal Multi-Rate LX4/CX4 - XAUI Re-Timer

The nLiten BBT3821 is a fully integrated octal 2.488Gbps to 3.1875Gbps Clock and Data Recovery (CDR) circuit and Retimer ideal for high bandwidth serial electrical or optical Communications systems. It extracts Timing information and data from serial inputs at 2.488Gbps to 3.1875Gbps, covering 10 Gigabit Fiber Channel (10GFC) and IEEE 802.3 specified 10 Gigabit Ethernet eXtended Attachment Unit Interface (XAUI) rates.
Each BBT3821 accepts two sets of four high-speed differential serial signals, re-times them with a local Reference Clock reduces jitter, and delivers eight clean high-speed signals. The BBT3821 provides a full-function XAUI-to-10GBASE-CX4 PMA/PMD (compatible with the IEEE 802.3ak specification), and also CAN be configured to provide the electrical portion of a XAUI-to-10GBASE-LX4 PMA/PMD, needing only Laser Drivers and photo detectors to be added. In both these applications, the XAUI side CAN be configured to implement the XENPAK MSA_R3.0 specification, including full NVR and DOM support. The XPAK and X2 specifications currently all reference the XENPAK specification, and are supported in exactly the same manner. The BBT3821 CAN also be used to enhance a single full-duplex 10 Gigabit XAUI link, extending the driving distance of the high-speed (2.488Gbps to 3.1875Gbps) differential traces to 40 inches of FR4 PCB (assuming a proper impedance-controlled layout).
Each lane CAN operate independently with a data transfer rate of within 100ppm of either 20x or 10x the local Reference Clock The reference Clock should be 156.25MHz for 10 Gigabit Ethernet XAUI applications, and 159.375MHz for 10 Gigabit Fiber Channel. Other reference frequencies CAN be used for proprietary rates. For other applications, each of the 8 lanes CAN be operated independently, within the same data rate and Clock restrictions.
By Intersil Corporation
Part Manufacturer Description Datasheet Samples
BBT3821-JH Intersil Corporation SPECIALTY TELECOM CIRCUIT, PBGA192, 17 X 17 MM, 1 MM PITCH, EBGA-192
BBT3821LP-JH Intersil Corporation SPECIALTY TELECOM CIRCUIT, PBGA192, 17 X 17 MM, 1 MM PITCH, EBGA-192
BBT3821 's PackagesBBT3821 's pdf datasheet

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BBT3821 Application circuits
BBT3821 circuits
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