LAN91C111-NU

Product Overview

Category: Network Interface Controller (NIC)

Use: The LAN91C111-NU is a highly integrated single-chip Ethernet controller designed for embedded applications. It provides a complete solution for connecting devices to an Ethernet network.

Characteristics: - High-performance Ethernet controller - Integrated MAC and PHY functions - Supports 10BASE-T and 100BASE-TX Ethernet standards - Low power consumption - Small form factor package - Robust and reliable performance

Package: The LAN91C111-NU is available in a compact surface-mount package, making it suitable for space-constrained designs.

Essence: The LAN91C111-NU is the core component of an Ethernet interface, enabling devices to communicate over an Ethernet network.

Packaging/Quantity: The LAN91C111-NU is typically sold in reels or trays, with quantities varying based on customer requirements.

Specifications

The LAN91C111-NU offers the following specifications:

• Ethernet Standards: 10BASE-T, 100BASE-TX
• Operating Voltage: 3.3V
• Data Rate: 10 Mbps (10BASE-T), 100 Mbps (100BASE-TX)
• Interface: MII (Media Independent Interface)
• Operating Temperature Range: -40°C to +85°C
• Power Consumption: Low power design for energy efficiency

Detailed Pin Configuration

The LAN91C111-NU features a pin configuration as follows:

1. VDD33: Power supply (3.3V)
2. TXEN: Transmit Enable
3. TXD0: Transmit Data Bit 0
4. TXD1: Transmit Data Bit 1
5. TXD2: Transmit Data Bit 2
6. TXD3: Transmit Data Bit 3
7. TXD4: Transmit Data Bit 4
8. TXD5: Transmit Data Bit 5
9. TXD6: Transmit Data Bit 6
10. TXD7: Transmit Data Bit 7
11. TXER: Transmit Error
12. TXCLK: Transmit Clock
13. RXD0: Receive Data Bit 0
14. RXD1: Receive Data Bit 1
15. RXD2: Receive Data Bit 2
16. RXD3: Receive Data Bit 3
17. RXD4: Receive Data Bit 4
18. RXD5: Receive Data Bit 5
19. RXD6: Receive Data Bit 6
20. RXD7: Receive Data Bit 7
21. RXDV: Receive Data Valid
22. CRS: Carrier Sense
23. RXER: Receive Error
24. RXCLK: Receive Clock
25. MDC: Management Data Clock
26. MDIO: Management Data I/O
27. RESET: Reset Input
28. VSS: Ground

Functional Features

The LAN91C111-NU offers the following functional features:

• Integrated Media Access Controller (MAC) and Physical Layer (PHY)
• Supports full-duplex and half-duplex communication modes
• Auto-negotiation for optimal speed and duplex settings
• Built-in error detection and correction mechanisms
• Supports various network protocols, including TCP/IP and UDP
• Provides hardware-assisted checksum offloading for improved performance
• Supports Wake-on-LAN functionality for remote device wake-up

Advantages and Disadvantages

Advantages: - Highly integrated solution reduces component count and board space - Low power consumption for energy-efficient designs - Robust performance and reliability - Supports a wide range of network protocols - Wake-on-LAN feature enables remote device management

Disadvantages: - Limited to 10BASE-T and 100BASE-TX Ethernet standards - May require additional external components for specific applications

Working Principles

The LAN91C111-NU operates by receiving and transmitting data packets over an Ethernet network. It integrates the MAC and PHY functions, allowing devices to communicate using the Ethernet protocol. The controller handles tasks such as packet framing, error detection, and collision avoidance. It interfaces with the host device through the MII interface, enabling seamless integration into various embedded systems.

Detailed Application Field Plans

The LAN91C111-NU is widely used in various embedded applications that require Ethernet connectivity. Some of the common application fields include:

1. Industrial Automation: Enables communication between industrial devices and control systems over an Ethernet network.
2. Internet of Things (IoT): Facilitates connectivity in IoT devices, allowing them to exchange data with other devices or cloud services.
3. Home Automation: Integrates Ethernet connectivity into smart home devices, enabling remote control and monitoring capabilities.
4. Automotive: Enables in-vehicle networking for applications such as infotainment systems, telematics, and advanced