MDB1900ZB

MDB1900ZB Zero Delay Buffer for PCIe (Gen1/Gen2/Gen3), SAS, SATA, ESI, and QPI General Description The MDB1900ZB is a true zero delay buffer with a fullyintegrated, high-performance, low-power, and low-phase noise programmable PLL. The MDB1900ZB is capable of distributing the reference clocks for PCIe (Gen1/Gen2/Gen3), SATA, ESI, SAS, SMI and Intel® Quickpath Interconnect (QPI). The MDB1900ZB works in conjunction with a CK410B+, CK509B or CK420BQ clock synthesizer to provide reference clocks to multiple agents. The MDB1900ZB is designed for Intel’s DB1900Z specification. The Intel part designation for the MDB1900ZB is identified as G20746-002. Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. Block Diagram Features Supports zero delay (0ps) buffer mode for 100MHz and 133MHz clock frequencies. External feedback path for true zero delay operations Zero delay (PLL) mode can filter jitter in incoming clock Selectable PLL band...