SMSC flexpwr lan8710 User Manual
MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR
®
Technology in a Small Footprint
Datasheet
Revision 1.0 (04-15-09)
18
SMSC LAN8710/LAN8710i
DATASHEET
3.6
Analog Reference
3.7
Power Signals
TXN
28
AIO
Transmit/Receive Negative Channel 1.
RXP
31
AIO
Transmit/Receive Positive Channel 2.
RXN
30
AIO
Transmit/Receive Negative Channel 2.
Table 3.7 Analog References 32-QFN
SIGNAL
NAME
32-QFN
PIN #
TYPE
DESCRIPTION
RBIAS
32
AI
External 1% Bias Resistor. Requires a 12.1k ohm (1%) resistor to ground
connected as described in the Analog Layout Guidelines. The nominal
voltage is 1.2V and the resistor will dissipate approximately 1mW of power.
connected as described in the Analog Layout Guidelines. The nominal
voltage is 1.2V and the resistor will dissipate approximately 1mW of power.
Table 3.8 Power Signals 32-QFN
SIGNAL
NAME
32-QFN
PIN #
TYPE
DESCRIPTION
VDDIO
12
P
+1.6V to +3.6V Variable I/O Pad Power
VDDCR
6
P
+1.2V (Core voltage) - 1.2V for digital circuitry on chip. Supplied by the on-
chip regulator unless configured for regulator off mode using the
LED1/REGOFF pin. A 1uF decoupling capacitor to ground should be used on
this pin when using the internal 1.2V regulator.
chip regulator unless configured for regulator off mode using the
LED1/REGOFF pin. A 1uF decoupling capacitor to ground should be used on
this pin when using the internal 1.2V regulator.
VDD1A
27
P
+3.3V Analog Port Power to Channel 1.
VDD2A
1
P
+3.3V Analog Port Power to Channel 2 and to internal regulator.
VSS
FLAG
GND
The flag must be connected to the ground plane with a via array under the
exposed flag. This is the ground connection for the IC.
exposed flag. This is the ground connection for the IC.
Table 3.6 10/100 Line Interface Signals (continued) 32-QFN (continued)
SIGNAL
NAME
32-QFN
PIN #
TYPE
DESCRIPTION