MCHPKSZ8081RNDCA-TR
Overview
The KSZ8081RNDCA-TR is a single-supply 10Base-T/100Base-TX Ethernet physical layer transceiver designed for RMII v1.2 connectivity. It features a compact 24-pin QFN package and integrates on-chip termination resistors for differential pairs to reduce overall BOM count and PCB area. The device is optimized for low power consumption, requiring only 34mA during 100BASE-TX operation.
Why Choose This Part
This transceiver reduces design complexity by integrating termination resistors and offering flexible 50 MHz reference clock options for the RMII interface. It includes LinkMD TDR-based cable diagnostics to identify copper cabling faults, which simplifies field maintenance and troubleshooting. The low power consumption and multiple power-down modes, including energy-detect power-down, make it ideal for energy-sensitive applications.
Applications
Getting Started
To evaluate this PHY, engineers often use the KSZ8081RNA/RND Evaluation Board to interface with a MAC-capable microcontroller or FPGA. The device is configured via the standard MDC/MDIO management interface for register access. Hardware designers should pay close attention to the RMII clocking mode selection and ensure the 4mm x 4mm QFN package has a solid thermal ground pad connection.
KSZ8081 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Protocol | Package | Temp Range | Stock |
|---|---|---|---|---|
| KSZ8081RNDCA-TR (this part) Tape & Reel | — | — | — | 9,048 |
| KSZ8081RNACA-TR Tape & Reel | RMII | VFQFN-24 | 0degC ~ 70degC | 60,096 |
| KSZ8081RNAI (Microchip (formerly Micrel)) | RMII | VFQFN-24 | -40degC ~ 85degC | 43,432 |
| KSZ8081RNBCA-TR (Microchip (formerly Micrel)) Tape & Reel | RMII | VFQFN-32 | 0degC ~ 70degC | 19,338 |
| KSZ8081MNXCA-TR Tape & Reel | MII | VFQFN-32 | 0degC ~ 70degC | 4,678 |
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