Microchip 128-Pin TQFP Controller IC, 3.3 V 100 Mbps ISA, Full Duplex/Half Duplex LAN91C111-NU

Microchip LAN91C111-NU Controller IC is a high-performance Ethernet controller designed for embedded applications requiring reliable 10/100 Mbps network communications. Housed in a 128-pin TQFP surface mount package, this IC operates at a fixed 3.3 V supply voltage, providing compatibility with modern digital systems and low power consumption with a supply current of 140 mA.

This controller supports both full duplex and half duplex communication modes, facilitating flexible network configurations. Its ISA interface enables integration with a variety of industrial and computing platforms. The LAN91C111-NU supports the IEEE 802.3u standard, ensuring compatibility with 100BASE-TX Ethernet networks, ideal for embedded industrial, commercial, and networking equipment.

Designed for robustness, the device functions across an operating temperature range from 0°C to 70°C. The internal loopback mode permits comprehensive internal diagnostics to aid development and maintenance tasks, enhancing system reliability.

With a compact form factor measuring 16 mm x 16 mm x 1.2 mm, this surface mount device fits well within high-density PCB layouts. The 128-pin TQFP package ensures numerous I/O lines for connectivity and control.

This product is widely used in industrial automation, laboratory equipment, HVAC systems, manufacturing controls, and network interface applications requiring dependable and efficient Ethernet communication.

Supports data rates up to 100 Mbps for efficient network communication. Communicates via ISA interface suitable for embedded systems. Surface mount device provided in a 128-pin TQFP package for compact PCB design. Operates within 0°C to 70°C temperature range ensuring reliable performance.

Internal loopback mode supported for diagnostic testing and troubleshooting. Supply current of 140 mA at 3.3 V supply voltage. Dimensions are 16 mm length by 16 mm width and 1.2 mm height. Compliant with IEEE 802.3u Ethernet standard for 100BASE-TX networks.

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