Datasheet

Micrel, Inc. KS8721BL/SL
June 2009
3
M9999-062509-1.3
Revision History
Revision Date Summary of Changes
0.9 01/12/04 Data sheet created.
1.0 03/06/04
Initial release. Change to new format. Added part-ordering information. Editorial changes on pin
description, RMII, and media converter operation. Update circuit design, reset timing, thermal
resistance, electrical characteristics, and strapping option circuit.
1.1 05/17/04 Added BLI product information.
1.2 01/21/05
MDIO Pull-up resistor value changed to 4.7k. Added note on strapping option pins. Updated
bits 1b.0 - 1b.7 to self clearing. Updated electrical characteristics. Updated reference schematic
for strapping option configuration to 3.3V. Crystal spec updated to 40 series resistance. Added
additional magnetics to qualified transformer table. Added 2 lead-free part options. Added
recommended reset circuit.
1.3 06/25/09 Update ordering information.