Datasheet > LXT971BC

LXT971BC

更新时间： 2023-08-15 00:00:00

品牌	Logo	应用领域
LevelOne		/
页数	文件大小	规格书
76页	796K
描述
Ethernet Transceiver, CMOS, PBGA64, PLASTIC, BGA-64

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LXT971BC 数据手册

Data Sheet

FEBRUARY 2000

Revision1.1

LXT971

3.3V Dual-Speed Fast Ethernet Transceiver

General Description

Features

The LXT971 is an IEEE compliant Fast Ethernet PHY

Transceiver that directly supports both 100BASE-TX and

10BASE-T applications. It provides a Media Independent

Interface (MII) for easy attachment to 10/100 Media

Access Controllers (MACs). The LXT971 also provides a

pseudo-ECL (PECL) interface for use with 100BASE-FX

fiber networks.

• 3.3V Operation.

• Low power consumption (300 mW typical).

• Low-power “Sleep” mode.

• 10BASE-T and 100BASE-TX using a single RJ-45

connection.

• Supports auto-negotiation and parallel detection.

• MII interface with extended register capability.

• Robust baseline wander correction performance.

• 100BASE-FX fiber optic capable.

The LXT971 supports full-duplex operation at 10 Mbps

and 100 Mbps. Its operating condition can be set using

auto-negotiation, parallel detection, or manual control.

The LXT971 is fabricated with an advanced CMOS

process and requires only a single 3.3V power supply.

• Standard CSMA/CD or full-duplex operation.

• Configurable via MDIO serial port or hardware

control pins.

Applications

• Integrated, programmable LED drivers.

• Combination 10BASE-T/100BASE-TX or

100BASE-FX Network Interface Cards (NICs)

• 64-pin Plastic Ball Grid Array (PBGA).

• LXT971BC - Commercial (0° to 70°C ambient).

• LXT971BE - Extended (-40° to 85°C ambient).

• 64-pin Low-profile Quad Flat Package (LQFP).

• LXT971LC - Commercial (0° to 70°C ambient).

• LXT971LE - Extended (-40° to 85°C ambient).

• 10/100 PCMCIA Cards

• Cable Modems and Set-Top Boxes

LXT971

Block Diagram

RESET

VCC

Pwr Supply

GND

P W R D W N

Management

Mode Select

Logic

ADDR<4:0>

MDIO

REFCLK

Clock

Generator

MDC

MDINT

MDDIS

TxSLEW<1:0>

Manchester

Encoder

TX_EN

TXD <3:0>

TX_ER

Driver

OSP

™

Pulse

TPFOP

TPFON

Parallel/Serial

Converter

Scrambler

100

Fiber

Shaper

Encoder

Out

TX_CLK

ECL

Driver

Auto

Negotiation

TDIO,

TMS,

TCK,

TRST

Set

LED/CFG <3:1>

COL

JTAG

OSP

™

Adaptive EQ with

Baseline Wander

Cancellation

Collision

Detect

Media

Select

Clock

Generator

100TX

100FX

10BT

RX_CLK

RXD <3:0>

RXDV

TPFIP

TPFIN

SD/TP

Manchester

Decoder

Fiber

Serial-to-

Parallel

Converter

OSP

™

Slicer

Decoder

Descrambler

Carrier Sense

Data Valid

Error Detect

100

CRS

RX_ER

Refer to www.level1.com for most current information.

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