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KSZ8721CL

更新时间： 2024-11-14 21:10:07
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美国微芯 - MICROCHIP /
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KSZ8721CL 数据手册

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KS8721CL  
Micrel, Inc.  
KS8721CL  
3.3V Single Power Supply 10/100BASE-TX/FX MII Physical Layer Transceiver  
Rev. 1.2  
Features  
General Description  
• Single chip 100BASE-TX/100BASE-FX/10BASE-T  
physical layer solution  
TheKS8721CLisa10BASE-T,100BASE-TX,and100BASE-  
FXphysicallayertransceiverprovidingMII/RMIIinterfacesto  
MACsandswitches. Usingauniquemixed-signaldesignthat  
extends signaling distance while reducing power consump-  
tion, the KS8721CL represents Micrel’s fourth generation  
single-port Fast Ethernet PHY.  
• 2.5V CMOS design; 2.5/3.3V tolerance on I/O  
• 3.3V single power supply with built-in voltage regulator;  
Power consumption <340mW (including output driver  
current)  
• Fully compliant to IEEE 802.3u standard  
• Supports MII and Reduced MII (RMII)  
• Supports 10BASE-T, 100BASE-TX, and 100BASE-FX  
with far-end-fault (FEF) detection  
TheKS8721CLcontains10BASE-Tphysicalmediumattach-  
ment (PMA), physical medium dependent (PMD), and physi-  
cal coding sub-layer (PCS) functions. It also has on-chip  
10BASE-T output filtering. This eliminates the need for  
external filters and allows a single set of line magnetics to be  
used to meet requirements for both 100BASE-TX and  
10BASE-T.  
• Supports power-down and power-saving modes  
• 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 modes  
• On-chip, built-in, analog front-end filtering for both  
100BASE-TX and 10BASE-T  
The KS8721CL automatically configures itself for 100Mbps  
or10Mbpsandfull-orhalf-duplexoperation,usinganon-chip  
auto-negotiation algorithm. It is the ideal physical layer  
transceiver for 100BASE-TX/10BASE-T applications.  
• Available in Lead-free and Industrial Temperature  
packages.  
Functional Diagram  
4B/5B Encoder  
NRZ/NRZI  
Scrambler  
TXD3  
TXD2  
TXD1  
TXD0  
TXER  
MLT3 Encoder  
10/100  
Pulse  
TX+  
TX-  
Parallel/Serial  
Transmitter  
Shaper  
Parallel/Serial  
Manchester Encoder  
TXC  
TXEN  
CRS  
COL  
MII/RMII  
Registers  
and  
Adaptive EQ  
Base Line  
4B/5B Decoder  
Descrambler  
Serial/Parallel  
RX+  
RX-  
Clock  
MDIO  
MDC  
Wander Correction  
MLT3 Decoder  
NRZI/NRZ  
Controller  
Interface  
Recovery  
RXD3  
RXD2  
RXD1  
RXD0  
RXER  
RXDV  
RXC  
Auto  
Negotiation  
10BaseT  
Receiver  
Manchester Decoder  
Serial/Parallel  
Power  
Down or  
Saving  
LINK  
ACTIVITY  
FDX  
SPD  
LED  
XI  
XO  
Driver  
PLL  
PWRDWN  
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com  
April 2005  
1
M9999-041405  
1234567...33

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KSZ8721CL 替代型号

型号 品牌 替代类型 描述 数据表
KSZ8001L MICROCHIP

类似代替

 DATACOM, ETHERNET TRANSCEIVER, PQFP48
KSZ8721BLI MICROCHIP

类似代替

 DATACOM, ETHERNET TRANSCEIVER, PQFP48
KS8721BL MICROCHIP

类似代替

 Ethernet Transceiver, 1-Trnsvr, CMOS, PQFP48, LQFP-48

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