Linear Technology LTC4257CS8-1: Power Over Ethernet Interface Controller

The LTC4257CS8-1 from Linear Technology is a sophisticated interface controller designed for Power over Ethernet (PoE) applications. As an integral component of networked devices, this controller facilitates the delivery of power alongside data over standard Ethernet cables, streamlining the installation and reducing cable clutter.

Key Features

• IEEE 802.3af Compliant: The LTC4257CS8-1 adheres to the IEEE 802.3af standard, ensuring compatibility with other PoE devices and systems.
• Integrated Detection and Classification: It supports powered device (PD) detection and classification signatures, critical for safe and efficient power management.
• High-Voltage Operation: Capable of withstanding up to 100V at the input, the controller provides robust protection against line surges and transients.
• Low Power Dissipation: The LTC4257CS8-1 is designed for minimal power loss, featuring an internal MOSFET with low on-resistance.
• Compact Package: Housed in an 8-lead narrow SOIC package, the LTC4257CS8-1 is ideal for space-constrained applications.

Applications

The LTC4257CS8-1 is suitable for a wide range of applications in network power delivery, including:

• Voice over IP (VoIP) phones
• Wireless access points
• Network cameras
• Industrial controls

Product Specifications

Parameter Value Part Number LTC4257CS8-1 Package 8-lead narrow SOIC Input Voltage (Max) 100V Operating Temperature -40°C to +85°C Compliance IEEE 802.3af

The LTC4257CS8-1 is a reliable solution for designers looking to integrate PoE capabilities into their products, offering both performance and protection to meet the demands of modern networked devices.