Datasheet

KSZ8081MNX/RNB
DS00002202C-page 32 2016-2018 Microchip Technology Inc.
3.13 Typical Current/Power Consumption
Table 3-9, Tab l e 3-10 ,and Ta b le 3-11 show typical values for current consumption by the transceiver (VDDA_3.3) and
digital I/O (VDDIO) power pins and typical values for power consumption by the KSZ8081MNX/RNB device for the indi-
cated nominal operating voltages. These current and power consumption values include the transmit driver current and
on-chip regulator current for the 1.2V core.
3.13.1 TRANSCEIVER (3.3V), DIGITAL I/OS (3.3V)
3.13.2 TRANSCEIVER (3.3V), DIGITAL I/OS (2.5V)
TABLE 3-10: TYPICAL CURRENT/POWER CONSUMPTION (VDDA_3.3 = 3.3V, VDDIO = 2.5V)
TABLE 3-9: TYPICAL CURRENT/POWER CONSUMPTION (VDDA_3.3 = 3.3V, VDDIO = 3.3V)
Condition
3.3V Transceiver
(VDDA_3.3)
3.3V Digital I/Os
(VDDIO)
Total Chip Power
mA mA mW
100BASE-TX Link-up (no traffic) 34 12 152
100BASE-TX Full-duplex @ 100% utilization
34 12 152
10BASE-T Link-up (no traffic)
15 10 82.5
10BASE-T Full-duplex @ 100% utilization
27 10 122
Power-saving mode (Reg. 1Fh, Bit [10] = 1)
15 10 82.5
EDPD mode (Reg. 18h, Bit [11] = 0)
11 10 69.3
EDPD mode (Reg. 18h, Bit [11] = 0) and
PLL off (Reg. 10h, Bit [4] = 1)
3.55 1.35 16.2
Software power-down mode (Reg. 0h, Bit [11] =1)
2.29 1.34 12.0
Software power-down mode (Reg. 0h, Bit [11] =1) and
slow-oscillator mode (Reg. 11h, Bit [5] =1)
1.15 0.29 4.75
Condition
3.3V Transceiver
(VDDA_3.3)
3.3V Digital I/Os
(VDDIO)
Total Chip Power
mA mA mW
100BASE-TX Link-up (no traffic) 34 12 142
100BASE-TX Full-duplex @ 100% utilization
34 12 142
10BASE-T Link-up (no traffic)
15 10 74.5
10BASE-T Full-duplex @ 100% utilization
27 10 114
Power-saving mode (Reg. 1Fh, Bit [10] = 1)
15 10 74.5
EDPD mode (Reg. 18h, Bit [11] = 0)
11 10 61.3
EDPD mode (Reg. 18h, Bit [11] = 0) and
PLL off (Reg. 10h, Bit [4] = 1)
3.55 1.35 15.1
Software power-down mode (Reg. 0h, Bit [11] =1)
2.29 1.34 10.9
Software power-down mode (Reg. 0h, Bit [11] =1) and
slow-oscillator mode (Reg. 11h, Bit [5] =1)
1.15 0.29 4.52