HDMP-0440

www.DataSheet4U.com Agilent HDMP-0440 Quad Port Bypass Circuit for Fibre Channel Arbitrated Loops Data Sheet Features Supports 1.0625 GBd Fibre Channel operation Supports 1.25 GBd Gigabit Ethernet (GE) operation Quad PBC in one package Equalizers on all inputs High-speed LVPECL I/O Buffered Line Logic (BLL) outputs (no external bias resistors required) 0.5 W typical power at VCC = 3.3 V 44 Pin, 10 mm, low-cost plastic QFP package Applications RAID, JBOD, BTS cabinets Two 2:1 muxes Two 1:2 buffers 1 ≥ N Gigabit serial buffer N ≥ 1 Gigabit serial mux Description The HDMP-0440 is a Quad Port Bypass Circuit (PBC), which provides a low-cost, low-power physical-layer solution for Fibre Channel Arbitrated Loop (FC-AL) disk array configurations. By using a PBC such as the HDMP-0440, hard disks may be pulled out or swapped while other disks in the array are available to the system. A PBC consists of multiple 2:1 multiplexers daisy chained together. Each port has two modes of operation: “disk in loop” and “disk bypassed.” When the “disk in loop” mode is selected, the loop goes into and out of the disk drive at that port. For example, data goes from the HDMP-0440’s TO_NODE[n]± differential output pins to the Disk Drive Transceiver IC’s (e.g. an HDMP-1636A) Rx differential input pins. Data from the Disk Drive Transceiver IC’s Tx differential outputs goes to the HDMP-0440’s FM_NODE[n]± differential input pins. Figure 2 shows connection diagrams for disk drive ...