Micrel, Inc.

KSZ8041NLJ

April 2010

4

M9999-040110-1.0

Reference Circuit for Power and Ground Connections .................................................................................................... 21

Register Map........................................................................................................................................................................ 22

Register Description ........................................................................................................................................................... 22

Absolute Maximum Ratings

Operating Ratings

Electrical Characteristics ................................................................................................................................................... 29

Timing Diagrams ................................................................................................................................................................. 31

MII SQE Timing (10Base-T) ............................................................................................................................................. 31

MII Transmit Timing (10Base-T)....................................................................................................................................... 32

MII Receive Timing (10Base-T)........................................................................................................................................ 33

MII Transmit Timing (100Base-TX) .................................................................................................................................. 34

MII Receive Timing (100Base-TX) ................................................................................................................................... 35

RMII Timing....................................................................................................................................................................... 36

Auto-Negotiation Timing ................................................................................................................................................... 37

MDC/MDIO Timing ........................................................................................................................................................... 38

Reset Timing..................................................................................................................................................................... 39

Reset Circuit ........................................................................................................................................................................ 40

Reference Circuits for LED Strapping Pins ...................................................................................................................... 41

Selection of Isolation Transformer.................................................................................................................................... 42

Selection of Reference Crystal .......................................................................................................................................... 42

Package Information ........................................................................................................................................................... 43