SMSC LAN8720i User Manual
Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
SMSC LAN8720/LAN8720i
71
Revision 1.0 (05-28-09)
DATASHEET
Note 7.5
These levels apply when a 0-3.3V Clock is driven into XTAL1/CLKIN and XTAL2 is floating.
The maximum input voltage on XTAL1/CLKIN is VDD2A + 0.4V.
The maximum input voltage on XTAL1/CLKIN is VDD2A + 0.4V.
Table 7.7 LAN Interface Signals
NAME
V
IH
V
IL
I
OH
I
OL
V
OL
V
OH
TXP
See
.
TXN
RXP
RXN
Table 7.8 LED Signals
NAME
V
IH
(V)
V
IL
(V)
I
OH
I
OL
V
OL
(V)
V
OH
(V)
LED1/REGOFF
0.63 * VDD2A
0.39 * VDD2A
-12 mA
+12 mA
+0.4
VDD2A – +0.4
LED2/nINTSEL
0.63 * VDD2A
0.39 * VDD2A
-12 mA
+12 mA
+0.4
VDD2A – +0.4
Table 7.9 Configuration Inputs
NAME
V
IH
(V)
V
IL
(V)
I
OH
I
OL
V
OL
(V)
V
OH
(V)
RXD0/MODE0
0.68 * VDDIO
0.39 * VDDIO
-8 mA
+8 mA
+0.4
VDDIO – +0.4
RXD1/MODE1
0.68 * VDDIO
0.39 * VDDIO
-8 mA
+8 mA
+0.4
VDDIO – +0.4
RXER/PHYAD0
0.68 * VDDIO
0.39 * VDDIO
-8 mA
+8 mA
+0.4
VDDIO – +0.4
CRS_DV/MODE2
0.68 * VDDIO
0.39 * VDDIO
-8 mA
+8 mA
+0.4
VDDIO – +0.4
Table 7.10 General Signals
NAME
V
IH
(V)
V
IL
(V)
I
OH
I
OL
V
OL
(V)
V
OH
(V)
nINT/REFCLKO
-8 mA
+8 mA
+0.4
VDDIO – +0.4
nRST
0.63 * VDDIO
0.39 * VDDIO
+1.40 V
0.39 * VDD2A
XTAL2
-
-
Table 7.11 Internal Pull-Up / Pull-Down Configurations
NAME
PULL-UP OR PULL-DOWN
TXEN
Pull-down
RXD0/MODE0
Pull-up