Datasheet

 2016-2018 Microchip Technology Inc. DS00002202C-page 31
KSZ8081MNX/RNB
3.12 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 3-10 and Table 3-8 for 3.3V VDDIO.
FIGURE 3-10: KSZ8081MNX/RNB POWER AND GROUND CONNECTIONS
TABLE 3-8: KSZ8081MNX/RNB POWER PIN DESCRIPTIONS
Power Pin Pin Number Description
VDD_1.2 2 Decouple with 2.2 µF and 0.1 µF capacitors to ground.
VDDA_3.3 3
Connect to board’s 3.3V supply through a ferrite bead.
Decouple with 22 µF and 0.1 µF capacitors to ground.
VDDIO 17
Connect to board’s 3.3V supply for 3.3V VDDIO.
Decouple with 22 µF and 0.1 µF capacitors to ground.
VDDIO
KSZ8081MNX/RNB
GND
3.3V
VDDA_3.3
0.1μF
2
VDD_1.2
3
FERRITE
BEAD
17
1
PADDLE
2.2μF
0.1μF22μF
0.1μF22μF