MCHPKSZ8081MNXCA
Overview
The KSZ8081MNXCA is a single-supply 10Base-T/100Base-TX Ethernet physical layer transceiver designed for low power consumption and high integration. It utilizes a standard MII interface to connect with Media Access Controllers and features on-chip termination resistors to simplify PCB layout and reduce BOM cost. This PHY is built on a proprietary architecture that optimizes power levels and includes advanced diagnostics like LinkMD TDR-based cable testing.
Why Choose This Part
The device significantly reduces board complexity by integrating differential pair termination resistors and a voltage regulator for the core. It offers exceptional power efficiency with multiple power-down modes and a run current of only 34mA during full-duplex 100Mbps operation. Additionally, features like HP Auto MDI/MDI-X and LinkMD cable diagnostics simplify field deployment and troubleshooting.
Applications
Getting Started
To evaluate this PHY, use the KSZ8081MNX-Evaluation Board which allows for easy connection to a MAC via the MII interface. Ensure that the 25MHz crystal or external clock is provided as specified, and utilize the MDC/MDIO management interface for register configuration. Reference the Microchip LANCheck design review service to verify your differential pair routing and magnetics selection.
KSZ8081 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Protocol | Package | Temp Range | Stock |
|---|---|---|---|---|
| KSZ8081MNXCA (this part) | — | — | — | 3,952 |
| KSZ8081MNXCA-TR Tape & Reel | MII | VFQFN-32 | 0degC ~ 70degC | 4,678 |
| KSZ8081RNAI (Microchip (formerly Micrel)) | RMII | VFQFN-24 | -40degC ~ 85degC | 43,432 |
| KSZ8081RNACA-TR Tape & Reel | RMII | VFQFN-24 | 0degC ~ 70degC | 60,096 |
| KSZ8081RNBCA-TR (Microchip (formerly Micrel)) Tape & Reel | RMII | VFQFN-32 | 0degC ~ 70degC | 19,338 |
