EEWORLDEEWORLDEEWORLD

Part Number

Search

VSC7127T

Description
Family of Repeater/Retimer and Port Bypass Circuits for Fibre Channel
File Size174KB,12 Pages
ManufacturerVitesse Semiconductor Corporation
Websitehttp://www.vitesse.com/
Download Datasheet Compare View All

VSC7127T Overview

Family of Repeater/Retimer and Port Bypass Circuits for Fibre Channel

VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
VSC7127/VSC7129
Features
• ANSI X3T11 Fibre Channel Compliant
• 1.0625Gb/s Operation
• Features the FibreTimer
Configurable Clock
Recovery Unit (CRU): Repeater, Retimer or
Bypassed
• Six Port Bypass Circuits (PBC)
Family of Repeater/Retimer and Port
Bypass Circuits for Fibre Channel
Analog/Digital Signal Detect (SDU)
• On-Chip Transmit Termination
3.3V, 700mW Power Dissipation
• Compatible with HDMP-0451 (VSC7127) or
HDMP-0452 (VSC7129)
• 44-Pin, 10mm PQFP Package
General Description
The VSC7127 and VSC7129 contain six cascaded Port Bypass Circuits (PBCs), the FibreTimer
config-
urable Repeater/Retimer (CRU) and a Signal Detect Unit (SDU). These parts are typically used in distributing
Fibre Channel signals to an array of disk drives in an FC-AL loop as illustrated in Figure 1. The first
VSC7127’s CRU is configured as a Repeater to attenuate jitter, the second VSC7127’s CRU is bypassed to
reduce power and the third VSC7127’s CRU is configured as a retimer so that the output of the device is a jitter-
compliance point.
Each PBC is a multiplexer that is controlled by the corresponding SELx line which, if HIGH, selects the
external input or, if LOW, selects the output of the previous PBC. For the VSC712xR, when MODE is LOW
and SEL5 is HIGH, the CRU is a sophisticated repeater which has low latency, no peaking and attenuates jitter
even at low frequencies. When MODE is HIGH and SEL5 is HIGH, the CRU is a retimer which eliminates jit-
ter transfer but has increased latency due to an elasticity buffer which adds/drops Fibre Channel fill words in
order to accomodate the difference between the baud rate of the incoming data and the local REFCLK. When
SEL5 is LOW, the CRU is bypassed and powered down. The SDU monitors the analog levels of the IO+/- input
and monitors the output of the CRU digitally to indicate whether valid data is present.
The VSC7127/VSC7129 are similar to the VSC7124 which does not contain the FibreTimer
cell or CMU.
VSC7127/VSC7129 Block Diagram
O1+
O1-
I1+
I1-
SEL1
O2+
O2-
I2+
I2-
SEL2
O3+
O3-
I3+
I3-
SEL3
O4+
O4-
I4+
I4-
SEL4
O0+
O0-
I0+
I0-
SEL0
1
0
REFCLK
106.25MHz
CMU
1
0
1
0
1
0
1
0
0.1uF
PBC1
SEL5
1
0
PBC2
PBC3
PBC4
PBC0
PBC5
CRU
MODE
SDU
SIGDET
G52298-0, Rev 4.3
05/01/01
©
VITESSE
SEMICONDUCTOR CORPORATION
• 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Page 1

VSC7127T Related Products

VSC7127T VSC7129R VSC7129T VSC7129 VSC7127TQM VSC7127R VSC7127
Description Family of Repeater/Retimer and Port Bypass Circuits for Fibre Channel Family of Repeater/Retimer and Port Bypass Circuits for Fibre Channel Family of Repeater/Retimer and Port Bypass Circuits for Fibre Channel Family of Repeater/Retimer and Port Bypass Circuits for Fibre Channel Family of Repeater/Retimer and Port Bypass Circuits for Fibre Channel Family of Repeater/Retimer and Port Bypass Circuits for Fibre Channel Family of Repeater/Retimer and Port Bypass Circuits for Fibre Channel
STM32F407 cannot be woken up by external interrupt in stop mode
I use two buttons PA0 and PC13. First, I connect them to their respective interrupt lines, and then enter the shutdown mode through PA0. It is reasonable to press PC13 to wake up, but in actual operat...
wang5221 stm32/stm8
Link error when using __try fast in driver
When I use the __try __finally block in driver development, a link error will appear during linking: unresolved external symbol __except_handler4 Is there a missing link library? The libraries I linke...
fengpiao065 Embedded System
Windows Mobile Mouse Issues
Many Dopod and Samsung machines use trackballs and some sensor devices, but I don't know how to add a mouse to Windows Mobile. I adjusted the LCD driver, but still couldn't achieve the desired effect....
baronx2010 Embedded System
Serial port to Ethernet transparent transmission module
The transparent transmission module based on LM3S6911 can notify the serial port that Ethernet is connected and control Ethernet traffic....
bjmonsoon Microcontroller MCU
Texas Instruments helps the "Internet Car" Roewe RX5 create an innovative digital driving experience
[align=left][color=rgb(62, 62, 62)]相较于传统的车联网,上汽集团和阿里巴巴集团所推出的“互联网汽车”重新定义了汽车的网络互连,让汽车成为了互联网的新成员。凭借YunOS智能操作系统与阿里云之间的协同合作,“互联网汽车”能够将车机中传感器所采集的数据传送至云端进行交互,进而为导航、抬头显示(HUD)、驾驶员身份认证和其他高级驾驶员辅助系统赋予全新的互联网功能。[/c...
maylove Microcontroller MCU
LPC1114F Sample Application
Hello!! I am working on an ARM7 microcontroller (LPC1114) recently. I bought a board!! Since I am using this chip to do a project recently, lighting control, I want to make a minimum system!! Today, I...
GONGHCU NXP MCU

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 1519  306  1363  1382  150  31  7  28  4  44 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号