MDB1900ZBQY Microchip

MDB1900ZB Zero Delay Buffer for PCIe (Gen1/Gen2/Gen3), SAS, SATA, ESI, and QPI General Description Features The MDB1900ZB is a true zero delay buffer with a fully- Supports zero delay (0ps) buffer mode for 100MHz and integrated, high-performance, low-power, and low-phase 133MHz clock frequencies. noise programmable PLL. External feedback path for true zero delay operations The MDB1900ZB is capable of distributing the reference Zero delay (PLL) mode can filter jitter in incoming clock clocks for PCIe (Gen1/Gen2/Gen3), SATA, ESI, SAS, SMI Selectable PLL bandwidth for PLL mode and Intel Quickpath Interconnect (QPI). The MDB1900ZB Supports fanout buffer mode for clock frequencies works in conjunction with a CK410B+, CK509B or between 0 and 250MHz CK420BQ clock synthesizer to provide reference clocks to Differential input reference with HCSL logic (0~0.7V) multiple agents. Nineteen differential HCSL-compatible clock output The MDB1900ZB is designed for Intels DB1900Z pairs specification. The Intel part designation for the Eight dedicated OE pins to control their assigned MDB1900ZB is identified as G20746-002. output. Glitch free assertion/de-assertion. Datasheets and support documentation are available on Spread spectrum modulation tolerant for EMI reduction Micrels web site at: www.micrel.com. SMBus interface for controlling output properties (enable/disable and delay tuning) Block Diagram Disabled outputs in power-down mode for maximum power savings Nine selectable SMBus addresses so multiple devices can share the same SMBus 3.3V or 2.5V operation Commercial temperature range (0 C to +70C) 72-pin 10mm 10mm QFN package GREEN, RoHS, and PFOS compliant Applications PCI Express timing (Gen1/2/3) in Intel platforms, specifically the Romley platform SATA / SAS timing (storage) ESI and SMI systems (storage) Intel Quickpath Interconnect Key Specifications Cycle-to-cycle jitter (PLL mode): <35ps Output-to-output skew: <35ps Input-to-output delay (PLL mode): Fixed at 0ps Input-to-output delay variation (PLL mode): 13ps Phase Jitter, PCIe Gen3: 0.25ps Accumulated Jitter, QPI 9.6Gb/s: <0.15ps Intel is a registered trademark of Intel Corporation. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MDB1900ZB Ordering Information (1) Part Number Marking Shipping Ambient Temperature Range Package MDB1900ZBQY TR MDB1900ZBQ Tape and Reel -40C to +85C 72-Pin 10mm 10mm QFN MDB1900ZBQZ TR MDB1900ZBQ Tape and Reel 0C to +70C 72-Pin 10mm 10mm QFN Note: 1. Device is GREEN, RoHS, and PFOS compliant. Lead finish is 100% matte tin. Pin Configuration 72-Pin 10mm 10mm QFN September 3, 2015 2 Revision 1.2 tcghelp micrel.com or (408) 955-1690