KSZ8721B

更新时间： 2024-11-14 03:48:51

品牌	Logo	应用领域
麦瑞 - MICREL		局域网（LAN）标准
页数	文件大小	规格书
32页	201K
描述
2.5V 10/100BasTX/FX MII Physical Layer Transceiver

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中文翻译

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KSZ8721B 数据手册

KS8721B/BT

Micrel

KS8721B/BT

2.5V 10/100BasTX/FX MII Physical Layer Transceiver

Rev. 2.2

General Description

Features

Operating at 2.5 volts to meet low voltage and low power

requirements, the KS8721B/BT is a 10BaseT/100BaseTX/

FX Physical Layer Transceiver, which provides an MII to

transmit and receive data. It contains the 10BaseT Physical

Medium Attachment (PMA), Physical Medium Dependent

(PMD), and Physical Coding Sub-layer (PCS) functions.

Moreover, the KS8721B/BT has on-chip 10BaseT output

filtering, which eliminates the need for external filters and

allows a single set of line magnetics to be used to meet

requirements for both 100BaseTX and 10BaseT.

• Single chip 100BaseTX/100BaseFX/10BaseT physical

layer solution

• 2.5V CMOS design, power consumption <200mW

(excluding output driver current )

• Fully compliant to IEEE 802.3u standard

• Supports Media Independent Interface (MII) and

Reduced MII (RMII)

• Supports 10BaseT, 100BaseTX and 100BaseFX with

Far_End_Fault Detection

• Supports power down mode and power saving mode

• Configurable through MII serial management ports or via

external control pins

• Supports auto-negotiation and manual selection for

10/100Mbps speed and full/half-duplex mode

• On-chip built-in analog front end filtering for both

100BaseTX and 10BaseT

TheKS8721B/BTcanautomaticallyconfigureitselffor100or

10Mbpsandfullorhalfduplexoperation, usingon-chipAuto-

Negotiation algorithm. It is an ideal choice of physical layer

transceiver for 100BaseTX/10BaseT applications.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Functional Diagram

4B/5B Encoder

NRZ/NRZI

MLT3 Encoder

TXD3

TXD2

TXD1

TXD0

TXER

TXC

Scrambler

10/100

Pulse

Shaper

TX+

TX-

Parallel/Serial

Transmitter

Parallel/Serial

Manchester Encoder

TXEN

CRS

COL

MII/RMII

Registers

and

Controller

Interface

Adaptive EQ

RX+

RX-

Base Line

Wander Correction

MLT3 Decoder

NRZI/NRZ

4B/5B Decoder

Descrambler

Clock

Recovery

MDIO

MDC

RXD3

RXD2

RXD1

RXD0

RXER

RXDV

RXC

Serial/Parallel

Auto

Negotiation

10BaseT

Receiver

Manchester Decoder

Serial/Parallel

Power

Down or

Saving

LINK

COL

FDX

SPD

LED

Driver

PLL

PWRDWN

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

August 2003

KS8721B/BT

12 3 4 5 6 7...32

中文翻译

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KSZ8721B 替代型号

型号	品牌	替代类型	描述	数据表
KSZ8721BI	MICREL	类似代替	2.5V 10/100BasTX/FX MII Physical Layer Transceiver
KS8721BL	MICREL	功能相似	3.3V 10/100 BASE-TX/FX PHYSICAL LAYER TRANSCEIVER

与KSZ8721B相关器件

型号	品牌	获取价格	描述	数据表
KSZ8721BI	MICREL	获取价格	2.5V 10/100BasTX/FX MII Physical Layer Transceiver
KSZ8721BI	MICROCHIP	获取价格	DATACOM, ETHERNET TRANSCEIVER, PDSO48
KSZ8721BITR	MICREL	获取价格	暂无描述
KSZ8721BI-TR	MICROCHIP	获取价格	DATACOM, ETHERNET TRANSCEIVER, PDSO48
KSZ8721BL	MICREL	获取价格	3.3V Single Power Supply 10/100BASE-TX/FX MII Physical Layer Transceiver
KSZ8721BL	MICROCHIP	获取价格	DATACOM, ETHERNET TRANSCEIVER, PQFP48
KSZ8721BLI	MICREL	获取价格	3.3V Single Power Supply 10/100BASE-TX/FX MII Physical Layer Transceiver
KSZ8721BLI	MICROCHIP	获取价格	DATACOM, ETHERNET TRANSCEIVER, PQFP48
KSZ8721BLITR	MICREL	获取价格	DATACOM, ETHERNET TRANSCEIVER, PQFP48, LEAD FREE, LQFP-48
KSZ8721BLI-TR	MICROCHIP	获取价格	DATACOM, ETHERNET TRANSCEIVER, PQFP48

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