LAN83C180 Datasheet, PDF (4/10 Pages) SMSC Corporation – 10/100 FAST ETHERNET PHY TRANSCEIVER

Migrating from the LAN83C180 10/100 PHY to the LAN83C185 10/100 PHY
2 Summary of Differences Between the LAN83C180 and
LAN83C185
The areas listed below briefly outline areas of change that a designer needs to address when transitioning
from the LAN83C180 to LAN83C185 designs. For details, please refer to the corresponding sections in this
application note.
Table 2.1 – Design Transitions from the LAN83C180 to LAN83C185
SECTION
3 Power Requirements
4 Cable Interface
5 Clock Circuit
6 LED’s
7 General Considerations
DESCRIPTION
+3v Voltage Source
Magnetics
Transmit Terminations
Receive Terminations
ƒ Parallel Crystal Circuit
ƒ Crystal Series Terminations
LED Function Indicators
Pinout Differences
ƒ Non-Pin Compatible
PHY Address
ƒ Dedicated vs. Non-dedicated pins
MII Interface
ƒ MDIO Pull-up
ƒ RX Series Terminations
RBIAS
ƒ Dual vs. Single RBIAS Pin
Mode
ƒ Dual- vs. Tri-pin Implementation
PAGE (S)
5
6
6
7
8
8
9
9
9
10
10
SMSC AN 10.13
Page 4
APPLICATION NOTE
Revision 1.2 (07-12-04)