KSZ8851SNLI

Overview

The KSZ8851SNLI is a high-performance, single-chip 10/100 Ethernet controller with a Serial Peripheral Interface (SPI) designed for embedded applications. It features an integrated MAC and PHY with a 128-byte EEPROM interface and an internal 12KB RX/TX FIFO buffer to manage packet traffic efficiently. This controller is ideal for adding networking capabilities to microcontrollers that lack a built-in Ethernet MAC.

Why Choose This Part

The KSZ8851SNLI features a high-speed SPI host interface that supports clock speeds up to 40MHz, significantly reducing CPU overhead compared to standard controllers. Its integrated PHY supports Auto-MDI/MDI-X and HP Auto-MDIX, simplifying cabling requirements and hardware design. The 32-QFN package and wide supply voltage range from 1.8V to 3.3V provide significant layout and power flexibility.

Applications

Getting Started

Developers can evaluate the chip using the KSZ8851SNL Evaluation Board from Microchip. Software integration is supported by available C-based drivers for various RTOS and bare-metal environments, focusing on the SPI register mapping. Ensure proper termination of the differential pairs and provide a stable 25MHz crystal or oscillator source for the internal PHY.

KSZ8851 Family

Comparing specs that differ across variants. The current part is highlighted.

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