LAN91C111-NU-E2

Controllers Overview

The LAN91C111-NU-E2 is a single-chip Ethernet controller integrating a MAC and PHY, manufactured by SMSC. It supports dual-speed operation at 10 Mbps and 100 Mbps over IEEE 802.3 and 802.3u standards. The device features an internal 8 Kbyte memory for receive and transmit FIFO buffers and utilizes a Media Independent Interface (MII). It operates on a 3.3V supply voltage within a commercial temperature range of 0°C to 70°C. The component is housed in a 128-pin Thin Quad Flat Package (TQFP) with lead-free construction compliant with RoHS directives.

Controllers Feature Summary

• Integrates full-duplex switched Ethernet support with burst data transfer capabilities
• Includes enhanced power management features for low-power applications
• Supports optional configuration via serial EEPROM interface

Controllers Applications

• Embedded network interfaces for microcontroller-based systems
• Industrial control systems requiring reliable Ethernet connectivity
• Network appliances utilizing non-PCI host architectures

Controllers Procurement Notes

Verify the specific suffix -E2 against official Microchip or SMSC documentation to confirm it denotes lead-free compliance or environmental status rather than a functional variant. Ensure the package designation matches the required 128-pin TQFP form factor for your PCB layout. Cross-reference the manufacturer history as SMSC assets were acquired by Microchip Technology.

Controllers Selection Notes

Select this component when a standalone MAC-PHY solution is required without a dedicated PCI bus interface. It is suitable for hosts supporting EISA, ISA, or general parallel buses. Verify that the target system can accommodate the 128-pin footprint and provides the necessary 3.3V power rails. Confirm compatibility with the MII interface speed requirements of the connected PHY layer.

Controllers Part Context

This part belongs to the LAN91C11x family of Fast Ethernet controllers originally developed by Standard Microsystems Corporation (SMSC). Following the acquisition of SMSC's networking division, production and datasheets are managed by Microchip Technology. The LAN91C111 serves as a cost-effective alternative to PCI-based Ethernet controllers for embedded designs.

Controllers Replacement Considerations

Publicly confirmed substitute part numbers for the LAN91C111-NU-E2 are not available in the provided reference material. Users should consult current Microchip product selection guides for compatible successors or pin-compatible alternatives.