Hewlett-Packard HDMP-0422
The HDMP-0422 is a Single Port Bypass Circuit (PBC) with Clock and Data Recovery (CDR) capability included. This integrated circuit provides a low-cost, lowpower physical-layer solution for Fibre Channel Arbitrated Loop (FC-AL) disk array configurations. By using a PBC such as the HDMP0422, hard disks may be pulled out or swapped while other disks in the array are available to the system.| Part No. | HDMP-0422 |
|---|---|
| Datasheet | HDMP-0422 Download |
| Manufacturer |  Hewlett-Packard |
| Description | Single Port Bypass Circuit |
| Buy | Stock & Price |
FEATURES
● Supports 1.0625 GBd Fibre Channel operation● Supports 1.25 GBd Gigabit Ethernet (GE) operation
● Single PBC/CDR in one package
● CDR location determined by choice of cable input/output
● Amplitude valid and data valid detection (Fibre channel rate only) on FM_NODE[0] input
● Equalizers on all inputs
● High-speed LVPECL I/O
● Buffered Line Logic (BLL) outputs (no external bias resistors required)
● 0.46 W typical power at VCC = 3.3 V
● 24 Pin, low-cost SSOP package
APPLICATIONS
● RAID, JBOD, BTS cabinets● One 2:1 muxes
● One 1:2 buffers
● 1 ≥ N Gigabit serial buffer
● N ≥ 1 Gigabit serial mux
DESCRIPTION
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-0422’s TO_NODE[n]± differential output pins to the Disk Drive Transceiver IC’s (e.g. an HDMP-1636A) Rx differential input pins.
