KSZ8081RNBCA
Physical Layer TransceiverThe KSZ8081RNBCA is a physical layer transceiver from Microchip Technology. View the full KSZ8081RNBCA datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
KSZ8081RNBCA shares its datasheet with KSZ8081, whose page lists every part number it covers.
Official KSZ8081RNBCA datasheet (PDF) — the source this page was extracted from.
KSZ8081RNBCA Key Specifications
| Parameter | Value |
|---|---|
| ESD Rating (HBM) | 6 kV |
| Digital Interfaces | MII, RMII v1.2, MDC/MDIO |
| Package Dimensions | 5 mm x 5 mm |
| Ethernet Data Rates | 10 Mbps, 100 Mbps |
| Main Supply Voltage | 3.3V |
| I/O Supply Voltage Options | 1.8V, 2.5V, 3.3V |
| Reference Clock Input Frequency | 25 MHz (±50 ppm) or 50 MHz (±50 ppm) |
| Reference Clock Output Frequency (RMII) | 50 MHz |
KSZ8081RNBCA Overview
Part: KSZ8081 — Micrel Inc.
Type: 10Base-T/100Base-TX Ethernet Physical Layer Transceiver
Description: A single-supply 10Base-T/100Base-TX Ethernet physical-layer transceiver for data transmission and reception over standard CAT-5 UTP cable, featuring on-chip termination resistors, an integrated 1.2V regulator, and LinkMD TDR-based cable diagnostics.
Operating Conditions:
- Supply voltage: 3.3V (VDD I/O options for 1.8V, 2.5V, or 3.3V)
- Operating temperature: -40°C to +85°C
- Clock input: 25MHz crystal
Features:
- Single-chip 10Base-T/100Base-TX IEEE 802.3 compliant Ethernet transceiver
- MII (KSZ8081MNX) and RMII v1.2 (KSZ8081RNB) interface support
- HP Auto MDI/MDI-X to reliably detect and correct straight-through and crossover cable connections
- Auto-negotiation to automatically select the highest linkup speed (10/100Mbps) and duplex (half/full)
- LinkMD TDR-based cable diagnostics to identify faulty copper cabling
- Built-in 1.2V regulator for core
Applications:
- Game console
- IP phone
- IP set-top box
- IP TV
- LOM
- Printer
Package:
- 32-pin (5mm × 5mm) QFN package
KSZ8081RNBCA Features
- Single-chip 10Base-T/100Base-TX IEEE 802.3 compliant Ethernet transceiver
- MII interface support (KSZ8081MNX)
- RMII v1.2 Interface support with a 50MHz reference clock output to MAC, and an option to input a 50MHz reference clock (KSZ8081RNB)
- Back-to-back mode support for a 100Mbps copper repeater
- MDC/MDIO management interface for PHY register configuration
- Programmable interrupt output
- LED outputs for link, activity, and speed status indication
- On-chip termination resistors for the differential pairs
- Baseline wander correction
- HP Auto MDI/MDI-X to reliably detect and correct straight-through and crossover cable connections with disable and enable option
- Auto-negotiation to automatically select the highest linkup speed (10/100Mbps) and duplex (half/full)
- Power-down and power-saving modes
- LinkMD TDR-based cable diagnostics to identify faulty copper cabling
- Parametric NAND Tree support for fault detection between chip I/Os and the board
- HBM ESD rating (6kV)
LinkMD is a registered trademark of Micrel, Inc.
Micrel Inc. · 2180 Fortune Drive · San Jose, CA 95131 · USA · tel +1 (408) 944-0800 · fax + 1 (408) 474-1000 · http://www.micrel.com
KSZ8081RNBCA Applications
- Game console
- IP phone
- IP set-top box
- IP TV
- LOM
- Printer
KSZ8081RNBCA Pin Configuration
32-Pin 5mm × 5mm QFN
KSZ8081RNBCA Electrical Characteristics
| Symbol | Parameter | Condition | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|---|
| Supply Current (V DDIO , V DDA_3.3 = 3.3V) (14) | Supply Current (V DDIO , V DDA_3.3 = 3.3V) (14) | Supply Current (V DDIO , V DDA_3.3 = 3.3V) (14) | Supply Current (V DDIO , V DDA_3.3 = 3.3V) (14) | Supply Current (V DDIO , V DDA_3.3 = 3.3V) (14) | Supply Current (V DDIO , V DDA_3.3 = 3.3V) (14) | Supply Current (V DDIO , V DDA_3.3 = 3.3V) (14) |
| I DD1_3.3V | 10Base-T | Full-duplex traffic @100% utilization | 41 | mA | ||
| I DD2_3.3V | 100Base-TX | Full-duplex traffic @100% utilization | 47 | mA | ||
| I DD3_3.3V | EDPD Mode | Ethernet cable disconnected (reg. 18h.11 = 0) | 20 | mA | ||
| I DD4_3.3V | Power-Down Mode | Software power-down (reg. 0h.11 = 1) | 4 | mA | ||
| CMOS Level Inputs | CMOS Level Inputs | CMOS Level Inputs | CMOS Level Inputs | CMOS Level Inputs | CMOS Level Inputs | CMOS Level Inputs |
| V IH | Input High Voltage | V DDIO = 3.3V | 2.0 | V | ||
| V IH | Input High Voltage | V DDIO = 2.5V | 1.8 | V | ||
| V IH | Input High Voltage | V DDIO = 1.8V | 1.3 | V | ||
| V IL | Input Low Voltage | V DDIO = 3.3V | 0.8 | |||
| V IL | Input Low Voltage | V DDIO = 2.5V | 0.7 | V | ||
| V IL | Input Low Voltage | V DDIO = 1.8V | 0.5 | |||
| \ | I IN \ | Input Current | V IN = GND ~ VDDIO | |||
| CMOS Level Outputs | CMOS Level Outputs | CMOS Level Outputs | CMOS Level Outputs | CMOS Level Outputs | CMOS Level Outputs | CMOS Level Outputs |
| V OH | Output High Voltage | V DDIO = 3.3V | 2.4 | V | ||
| V OH | Output High Voltage | V DDIO = 2.5V | 2.0 | V | ||
| V OH | Output High Voltage | V DDIO = 1.8V | 1.5 | V | ||
| V OL | Output Low Voltage | V DDIO = 3.3V | 0.4 | V | ||
| V OL | Output Low Voltage | V DDIO = 2.5V | 0.4 | V | ||
| V OL | Output Low Voltage | V DDIO = 1.8V | 0.3 | V | ||
| \ | I oz \ | Output Tri-State Leakage | ||||
| LED Output | LED Output | LED Output | LED Output | LED Output | LED Output | LED Output |
| I LED | Output Drive Current | Each LED pin (LED0, LED1) | 8 | mA |
KSZ8081RNBCA Absolute Maximum Ratings
- (V DD_1.2 ) .................................................. -0.5V to +1.8V
- (V DDIO , V DDA_3.3 ) ...................................... -0.5V to +5.0V
- Input Voltage (all inputs) .............................. -0.5V to +5.0V
- Output Voltage (all outputs) ......................... -0.5V to +5.0V
- Lead Temperature (soldering, 10s)............................260°C
- Storage Temperature (T S ).........................-55°C to +150°C
KSZ8081RNBCA Package Information
Table 26. Compatible Single-Port 10/100 Magnetics
- Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com.
32-Pin 5mm × 5mm QFN
32-Pin 5mm × 5mm QFN
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
| Part Number | Manufacturer | Package |
|---|---|---|
| KSZ8081 | Microchip Technology | VQFN-32 5x5mm |
| KSZ8081MNX | Microchip Technology | QFN-32 5x5mm |
| KSZ8081MNX-EVAL | Microchip Technology | 32-Pin QFN |
| KSZ8081MNX/RNB | Microchip Technology | QFN-32 5x5mm |
| KSZ8081MNXCA | Microchip Technology | 32-VFQFN Exposed Pad |
| KSZ8081MNXIA | Microchip Technology | 32-Pin QFN |
| KSZ8081RNB | Microchip Technology | 32-Pin QFN |
| KSZ8081RNB-EVAL | Microchip Technology | 32-Pin QFN |
| KSZ8081RNBIA | Microchip Technology | 32-Pin QFN |
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