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HDMP-0552

Part Number	HDMP-0552
Manufacturer	Hewlett-Packard
Description	QUAD PORT BYPASS CIRCUIT
Published	Dec 28, 2006
Detailed Description	www.DataSheet4U.com Agilent HDMP-0552 Quad Port Bypass Circuit with CDR and Data Valid Detection For Fibre Channel Arbi...
Datasheet	HDMP-0552 PDF File

Overview

www.
DataSheet4U.
com Agilent HDMP-0552 Quad Port Bypass Circuit with CDR and Data Valid Detection For Fibre Channel Arbitrated Loops Data Sheet Features • Supports 1.
0625/2.
125 GBd Fibre Channel operation • Quad PBC/CDR in one package • CDR location determined by choice of cable input/output • Amplitude valid detection on FM_NODE[0] input • Data valid detection on FM_NODE[0] input – Run length violation detection – Comma detection – Configurable for both singleframe and multi-frame detection • Speed select pin for 1 or 2 GBd operation • Single REFCLK for 1 or 2 GBd operation • CDR selectable via external pin • Enable/disable equalizers on all inputs • Enable/disable selected highspeed output drivers • High speed LVPECL I/O • Buffered line logic (BLL) outputs (no external bias resistors required) • 1.
1 W typical power at VCC = 3.
3 V • Advanced 0.
35 µ BiCMOS technology • 64 Pin, 10 mm, low cost plastic QFP package Applications • RAID, JBOD, BTS cabinets • 1=> 1-4 serial buffer with or without CDR Description The HDMP-0552 is a Quad Port Bypass Circuit (PBC) with Clock and Data Recovery (CDR) and data valid detection capability included.
See Figure 1 for block diagram.
This device minimizes part count, cost and jitter accumulation while repeating incoming signals.
Port Bypass Circuits are used in hard disk arrays constructed in Fibre Channel Arbitrated Loop (FC-AL) configurations.
By using Port Bypass Circuits, 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 along with a CDR.
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-0552’s TO_NODE[n]± differential output pins to the Disk Drive Transceiver IC (for example, an HDMP-263x) Rx± differential input pins.
Data from the Disk Drive Transceiver IC Tx±...

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HDMP-0552 QUAD PORT BYPASS CIRCUIT - Hewlett-Packard

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