Datasheet

Micrel, Inc.
KSZ8081MNX/KSZ8081RNB
August
19, 2015 38
Revision 1.4
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 3
Connect to board’s 3.3V supply through a ferrite bead.
Decouple with 22µF and 0.1µF capacitors to ground.
VDDIO 17
Connect to board’s 3.3V supply for 3.3V VDDIO.
Decouple with 22µF and 0.1µF capacitors to ground.