KSZ8081MNX Datasheet, PDF (38/69 Pages) Micrel Semiconductor – 10Base-T/100Base-TX Physical Layer Transceiver

Micrel, Inc.
KSZ8081MNX/KSZ8081RNB
Reference Circuit for Power and Ground Connections
The KSZ8081MNX/RNB is a single 3.3V supply device with a built-in regulator to supply the 1.2V core. The power and
ground connections are shown in Figure 10 and Table 9 for 3.3V VDDIO.
Figure 10. KSZ8081MNX/RNB Power and Ground Connections
Table 9. KSZ8081MNX/RNB Power Pin Descriptions
Power Pin Pin Number Description
VDD_1.2
2
Decouple with 2.2µF and 0.1µF capacitors to ground.
VDDA_3.3
Connect to board’s 3.3V supply through a ferrite bead.
3
Decouple with 22µF and 0.1µF capacitors to ground.
VDDIO
Connect to board’s 3.3V supply for 3.3V VDDIO.
17
Decouple with 22µF and 0.1µF capacitors to ground.
August 19, 2015
38
Revision 1.4