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LAN8720AI Datasheet(PDF) 35 Page - SMSC Corporation

No. de pieza LAN8720AI
Descripción Electrónicos  Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
PDF  79 Pages
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Fabricante Electrónico  SMSC [SMSC Corporation]
Página de inicio  http://www.smsc.com
Logo SMSC - SMSC Corporation

LAN8720AI Datasheet(HTML) 35 Page - SMSC Corporation

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Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
SMSC LAN8720A/LAN8720Ai
35
Revision 1.4 (08-23-12)
DATASHEET
In some system architectures, a 25MHz clock source is available. The device can be used to generate
the REF_CLK to the MAC as shown in Figure 3.9. It is important to note that in this specific example,
only a 25MHz clock can be used (clock cannot be 50MHz). Similar to the 25MHz crystal mode, the
nINT function is disabled.
Figure 3.8 Sourcing REF_CLK from a 25MHz Crystal
LAN8720A/LAN8720Ai
10/100 PHY
24-QFN
RMII
TXP
TXN
Mag
RJ45
RXP
RXN
25MHz
XTAL1/CLKIN
XTAL2
LED[2:1]
2
Interface
nRST
TXD[1:0]
2
RXD[1:0]
CRS_DV
2
RMII
MDIO
MDC
TXEN
REFCLKO
MAC
Capable of
accepting 50MHz
clock
Note: nINT not available in
this configuration
RXER
REF_CLK



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