Hewlett-Packard HDMP-0480
The HDMP-0480 is an Octal Cell Port Bypass Circuit (PBC). This device minimizes part count, cost and jitter accumulation. By using Port Bypass Circuits, hard disks may be pulled out or swapped while other disks in the array are available to the system.| Part No. | HDMP-0480 |
|---|---|
| Datasheet | HDMP-0480 Download |
| Manufacturer |  Hewlett-Packard |
| Description | Octal Cell Port Bypass Circuit without Clock and Data Recovery |
| Buy | Stock & Price |
FEATURES
● Supports 1.0625 GBd fibre channel operation● Supports 1.25 GBd gigabit Ethernet (GE) operation
● Octal cell PBC in one package
● Valid amplitude detection on FM_NODE[7] input
● Equalizers on all inputs
● High speed LVPECL I/O
● Buffered Line Logic (BLL) outputs (no external bias resistors required)
● 0.76 W typical power at Vcc=3.3V
● 64 Pin, 10 mm, low cost plastic QFP package
APPLICATIONS
● RAID, JBOD, BTS cabinets● Four 2:1 muxes
● Four 1:2 buffers
● 1 = > N gigabit serial buffer
● N = > 1 gigabit serial mux
DESCRIPTION
Port Bypass Circuits are used in hard disk arrays constructed in Fibre Channel Arbitrated Loop (FC-AL) configurations. A Port Bypass Circuit (PBC) consists of multiple 2:1 multiplexers daisy chained along with a CDR. Each port has two modes of operation: “disk in loop” and “disk by-passed”. 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-0480’s TO_NODE[n]± differential output pins to the Disk Drive Transceiver IC’s (e.g. an HDMP-1636A) Rx± differential input pins.
