ENC28J60-I/SO

Controllers Overview

The ENC28J60-I/SO is a stand-alone Ethernet controller manufactured by Microchip Technology, designed for integration with microcontrollers via an industry-standard Serial Peripheral Interface (SPI). It complies with IEEE 802.3 specifications and supports 10BASE-T networks at data rates up to 10 Mb/s in both full-duplex and half-duplex modes. The device integrates a Media Access Control (MAC) module and a 10Base-T Physical Layer (PHY) transceiver. Key electrical parameters include an operating voltage range of 3.1V to 3.6V, with a typical supply of 3.3V. It features an internal DMA module, hardware-assisted checksum calculation, and 8 Kbytes of dual-port SRAM for packet buffering. The component operates within an industrial temperature range of -40°C to +85°C and utilizes a 28-pin SOIC package.

Controllers Feature Summary

• Integrates a complete MAC and 10Base-T PHY with automatic polarity detection and correction capabilities.
• Supports programmable receive packet filtering including unicast, multicast, broadcast, and pattern matching schemes.
• Includes an internal Direct Memory Access (DMA) controller for efficient data movement and hardware-assisted checksum calculation.
• Features two programmable LED output pins for link status and network activity indication.

Controllers Applications

• Embedded systems requiring low-cost Ethernet connectivity via SPI interface
• Industrial control systems and PLC network communication modules
• Smart home automation devices and remote sensor nodes

Controllers Procurement Notes

Verify the specific suffix 'I/SO' corresponds to the Industrial temperature grade (-40°C to +85°C) and the SOIC-28 package type. Confirm that the host system provides a 25 MHz clock source or crystal oscillator circuit compatible with the OSC1/OSC2 pins. Ensure the design includes necessary external components such as pulse transformers and bias resistors as specified in the datasheet.

Controllers Selection Notes

Select this component when a standalone Ethernet solution with minimal pin count is required for 10 Mbps applications. It is suitable for microcontrollers lacking integrated MAC/PHY peripherals but possessing an SPI interface. Consider the 8 KB RAM limitation for high-throughput scenarios and verify compatibility with the target TCP/IP stack implementation.

Controllers Part Context

The ENC28J60 is part of Microchip's family of standalone Ethernet controllers. The '-I' designation indicates the industrial temperature rating, while '/SO' specifies the 28-pin Small Outline Integrated Circuit (SOIC) package variant. Other variants exist with different temperature ranges or packages, such as SSOP or QFN.

Controllers Replacement Considerations

Direct functional replacements are limited due to the specific combination of integrated MAC/PHY and SPI interface. Review Microchip's newer Ethernet controller families for potential upgrades, ensuring pinout and register compatibility if a drop-in replacement is required.