3.3V 28Mbps-2.7Gbps AnyRateВ®
CLOCK AND DATA RECOVERY WITH
INTEGRATED CLOCK MULTIPLIER UNIT Micrel, Inc. DESCRIPTION FEATURES
в– Recovers any data and clock from 28Mbps to
2.7Gbps OC-1, OC-3, OC-12, OC-48, ATM Gigabit Ethernet, Fast Ethernet Fibre Channel, 2x Fibre Channel P1394, Infiniband SMPTE-259, SMPTE-292 Proprietary optical transport
в– Integrated clock multiplier unit with low jitter
generation
в– Complies with Bellcore, ITU/CCITT and ANSI
specifications
в– Selectable mux for pass through; avoids jitter
accumulation when switching through backplanes
в– Available in 64-Pin EPAD-TQFP package The SY87721L is a complete Clock Recovery and Data
retiming integrated circuit for data rates from 28Mbps up to
2.7Gbps NRZ including SONET FEC data rates. Included
in the device, is a fully integrated Clock Multiplier Unit (CMU)
that is capable of generating frequencies that cover the
same data rate range as the CDR. The device is ideally
suited for SONET/SDH/ATM, Fibre Channel, and Gigabit
Ethernet applications, as well as other high-speed data
transmission applications.
Clock recovery and data retiming is performed by
synchronizing the on-chip VCO directly to the incoming data
stream. The VCO center frequency is controlled by the …