LAN9250/PT

Product Overview

Category: Integrated Circuit (IC)

Use: The LAN9250/PT is a highly integrated Ethernet controller designed for embedded applications. It provides a complete solution for connecting devices to an Ethernet network.

Characteristics: - High-performance Ethernet connectivity - Low power consumption - Small form factor - Robust and reliable operation

Package: The LAN9250/PT is available in a compact package, making it suitable for space-constrained applications.

Essence: The LAN9250/PT is the core component that enables devices to communicate over an Ethernet network.

Packaging/Quantity: The LAN9250/PT is typically sold in reels or trays, with quantities varying based on customer requirements.

Specifications

The LAN9250/PT offers the following specifications:

• Ethernet Compliance: IEEE 802.3
• Interface: SPI (Serial Peripheral Interface)
• Data Rate: 10/100 Mbps
• Operating Voltage: 3.3V
• Temperature Range: -40°C to +85°C
• Package Type: QFN (Quad Flat No-Lead)
• Pin Count: 32

Detailed Pin Configuration

The LAN9250/PT features a 32-pin QFN package with the following pin configuration:

1. VDDIO: Power supply for I/O pins
2. VDDA: Analog power supply
3. VSSA: Analog ground
4. VSSIO: Ground for I/O pins
5. INT_N: Interrupt output
6. SCLK: Serial clock input
7. MOSI: Master Out Slave In data input
8. MISO: Master In Slave Out data output
9. CS_N: Chip select input
10. RESET_N: Reset input
11. IRQ: Interrupt request input/output
12. REFCLK: Reference clock input
13. VDDCORE: Core power supply
14. VSSCORE: Core ground
15. XTAL1: Crystal oscillator input
16. XTAL2: Crystal oscillator output 17-32. NC: No connection

Functional Features

The LAN9250/PT offers the following functional features:

• Full-duplex and half-duplex operation modes
• Auto-negotiation for speed and duplex mode
• Integrated 10/100 Mbps Ethernet PHY
• Built-in DMA (Direct Memory Access) engine for efficient data transfer
• Support for various network protocols, including TCP/IP and UDP
• Power management features for low power consumption
• Hardware-assisted checksum calculation for improved performance

Advantages and Disadvantages

Advantages: - High-performance Ethernet connectivity - Compact form factor - Low power consumption - Robust and reliable operation - Support for various network protocols

Disadvantages: - Limited pin count may restrict certain applications - Requires external crystal oscillator for clock generation

Working Principles

The LAN9250/PT operates by receiving and transmitting Ethernet frames through its integrated Ethernet PHY. It communicates with the host microcontroller using the SPI interface. The LAN9250/PT handles tasks such as frame encapsulation, error checking, and protocol handling to ensure reliable data transmission over the Ethernet network.

Detailed Application Field Plans

The LAN9250/PT 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. Home Automation: Facilitates connectivity between smart home devices, allowing centralized control and monitoring.
3. Automotive: Integrates Ethernet connectivity into automotive systems for applications like infotainment and diagnostics.
4. Internet of Things (IoT): Enables IoT devices to connect to the internet and communicate with other devices or cloud services.

Detailed and Complete Alternative Models

• LAN8720: Similar Ethernet controller with a different pin configuration and package type.
• ENC28J60: Low-cost Ethernet controller with SPI interface, suitable for simple embedded applications.
• W5500: Ethernet controller with integrated TCP/IP stack, offering a complete solution for network connectivity.

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