The Microchip LAN91C111 is designed to facilitate the implementation of a third generation of Fast Ethernet connectivity solutions for embedded applications. For this third generation of products, flexibility and integration dominate the design requirements. The LAN91C111 is a mixed signal Analog/Digital device that implements the MAC and PHY portion of the CSMA/CD protocol at 10 and 100 Mbps. The design will also minimize data throughput constraints utilizing a 32-bit, 16-bit or 8-bit bus Host interface in embedded applications.

The total internal memory FIFO buffer size is 8 Kbytes, which is the total chip storage for transmit and receive operations.

The Microchip LAN91C111 is software compatible with the LAN9000 family of products.

Microchip's complimentary and confidential MicroCHECK design review service, which offers insight from the initial concept to the final PCB layout, is available to customers who are using our products in their projects. You can confidently submit your design materials in a secure and private setting, and our expert engineers will provide individualized feedback to enhance your design. MicroCHECK design review service is subject to Microchip's Program Terms and Conditions and requires a myMicrochip account.

• Single Chip Ethernet Controller

• Dual Speed - 10/100 Mbps

• Fully Supports Full Duplex Switched Ethernet

• Supports Burst Data Transfer

• 8 Kbytes Internal Memory for Receive and Transmit FIFO Buffers

• Enhanced Power Management Features

• Optional Configuration via Serial EEPROM Interface

• Supports 8, 16 and 32 Bit CPU Accesses

• Internal 32 Bit Wide Data Path (into Packet Buffer Memory)

• Built-in Transparent Arbitration for Slave Sequential Access Architecture

• Flat MMU Architecture with Symmetric Transmit and Receive Structures and Queues

• 3.3V Operation with 5V Tolerant I/O Buffers

• Single 25 MHz Reference Clock for Both PHY and MAC

• External 25 MHz Output Pin for an External PHY Supporting PHY's Physical Media

• Low Power CMOS Design

• ARM

• SH

• Power PC

• Coldfire

• 680X0, 683XX

• MIPS R3000

• 3.3V MII (Media Independent Interface) MAC-PHY Interface Running at Nibble Rate

• MII Management Serial Interface

• 128 Pin QFP RoHS compliant package

• 128 Pin TQFP 1.0 mm height RoHS compliant package

• Commercial Temperature Range from 0°C to 70°C (LAN91C111)

• Industrial Temperature Range from -40°C to 85°C (LAN91C111i)

• Fully Integrated IEEE 802.3/802.3u - 100BASE-TX/10BASE-T Physical Layer

• Auto Negotiation: 10/100, Full/Half Duplex

• On Chip Wave Shaping - No External Filters Required

• Adaptive Equalizer

• Baseline Wander Correction

• Full Duplex

• 10/100

• Transmit

• Receive