Datasheet
Table Of Contents
- 1.0 Introduction
- 2.0 Pin Description and Configuration
- 3.0 Functional Description
- 3.1 10BASE-T/100BASE-TX Transceiver
- 3.2 RMII Interface
- 3.3 Back-to-Back Mode – 100 Mbps Copper Repeater
- 3.4 MII Management (MIIM) Interface
- 3.5 Interrupt (INTRP)
- 3.6 HP Auto MDI/MDI-X
- 3.7 Loopback Mode
- 3.8 LinkMD® Cable Diagnostic
- 3.9 NAND Tree Support
- 3.10 Power Management
- 3.11 Reference Circuit for Power and Ground Connections
- 3.12 Typical Current/Power Consumption
- 4.0 Register Descriptions
- 5.0 Operational Characteristics
- 6.0 Electrical Characteristics
- 7.0 Timing Diagrams
- 8.0 Reset Circuit
- 9.0 Reference Circuits — LED Strap-In Pins
- 10.0 Reference Clock - Connection and Selection
- 11.0 Magnetic - Connection and Selection
- 12.0 Package Outline
2016 Microchip Technology Inc. DS00002199A-page 25
KSZ8081RNA/RND
TABLE 3-9: TYPICAL CURRENT/POWER CONSUMPTION (VDDA_3.3 = 3.3V, VDDIO = 1.8V)
Condition
3.3V Transceiver
(VDDA_3.3)
1.8V Digital I/Os
(VDDIO)
Total Chip Power
100BASE-TX Link-up (no traffic) 34 mA 11 mA 132 mW
100BASE-TX Full-duplex @ 100% utilization 34 mA 12 mA 134 mW
10BASE-T Link-up (no traffic) 15 mA 10 mA 67.5 mW
10BASE-T Full-duplex @ 100% utilization 27 mA 10 mA 107 mW
Power-saving mode (Reg. 1Fh, Bit [10] = 1) 15 mA 9 mA 65.7 mW
EDPD mode (Reg. 18h, Bit [11] = 0) 11 mA 9 mA 52.5 mW
EDPD mode (Reg. 18h, Bit [11] = 0) and
PLL off (Reg. 10h, Bit [4] = 1)
4.05 mA 1.21 mA 15.5 mW
Software power-down mode (Reg. 0h, Bit [11] =1) 2.79 mA 1.21 mA 11.4 mW
Software power-down mode (Reg. 0h, Bit [11] =1)
and slow-oscillator mode (Reg. 11h, Bit [5] =1)
1.65 mA 0.19 mA 5.79 mW