VSC7123RD2 Datasheet

IC型號：
VSC7123RD2
PDF描述：
Telecomm/Datacomm
文件大小：
196.66KB
PDF頁數(shù)：
18頁
芯片廠家：
ETC

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C IT

VITESSE

SEMICONDUCTOR CORPORATION

Advance Product Information

VSC7123 -

Extended Temperature Range

Features

鈥?802.3z Gigabit Ethernet Compliant 1.25 Gb/s

Transceiver

鈥?ANSI X3T11 Fibre Channel Compliant

1.0625 Gb/s Transceiver

鈥?0.98 Gb/s to 1.36 Gb/s Full-Duplex Operation

鈥?10-Bit TTL Interface for Transmit and

Receive Data

10-Bit Transceiver for Fibre

Channel and Gigabit Ethernet

鈥?Operating Temperature Down to -40

鈥?RX Cable Equalization

鈥?Analog/Digital Signal Detection

鈥?JTAG Access Port for Testability

鈥?64-Pin, 10 mm TQFP Package

鈥?Single +3.3V Supply, 650mW Typical

General Description

The VSC7123 Extended Temperature Range (ETR) is a full-speed Fibre Channel and Gigabit Ethernet

Transceiver with industry-standard pinouts, which operates down to

鈭?/div>

. The VSC7123 ETR accepts 10-bit

8B/10B encoded transmit data, latches it on the rising edge of REFCLK and serializes it onto the TX PECL dif-

ferential outputs at a baud rate which is 10 times the REFCLK frequency. Serial data input on the RX PECL dif-

ferential inputs is resampled by the Clock Recovery Unit (CRU) and deserialized onto the 10-bit receive data

bus synchronously to complementary divide-by-twenty clocks. The VSC7123 ETR receiver detects 鈥淐omma鈥?/div>

characters for frame alignment. An analog/digital signal detection circuit indicates that a valid signal is present

on the RX input. A cable equalizer compensates for InterSymbol Interference (ISI) in order to increase maxi-

mum cable distances.

VSC7123 ETR Block Diagram

R(0:9)

Serial to

Q Parallel D

梅10

2:1

RX+

RX-

RCLK

RCLKN

COMDET

ENCDET

EWRAP

SIGDET

T(0:9)

Clock

Recovery

梅20

Comma

Detect

Signal

Detect

Parallel

to Serial

TX+

TX-

REFCLK

x10 Clock

Multiply

NOT SHOWN: JTAG Boundary Scan

G52312-0, Rev 2.2

04/05/01

漏

VITESSE

SEMICONDUCTOR CORPORATION

鈥?741 Calle Plano 鈥?Camarillo, CA 93012

Tel: (800) VITESSE 鈥?FAX: (805) 987-5896 鈥?Email: prodinfo@vitesse.com

Internet: www.vitesse.com

Page 1

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