Product Overview: LTC4257CS8-1#PBF

The LTC4257CS8-1#PBF is a specialized integrated circuit designed by Linear Technology, now part of Analog Devices, for Power over Ethernet (PoE) applications. This robust IC is specifically engineered to provide a reliable interface solution for Powered Devices (PDs) that comply with the IEEE 802.3af standard, which governs the delivery of power over Ethernet networks.

Key Features

• IEEE 802.3af Compliant: The LTC4257CS8-1#PBF adheres to the strict specifications set by the IEEE 802.3af standard, ensuring compatibility with other compliant devices in a PoE system.
• Integrated Signature Resistor: This product features an integrated signature resistor, which is used by Power Sourcing Equipment (PSE) to detect the presence of a compliant PD.
• Programmable Classification: The device supports programmable class assignments, allowing for the correct power allocation to the PD by the PSE.
• High Voltage Interface: It is designed to handle the high voltage interface to the PoE input, providing protection and reliability in demanding network environments.
• Low Power Dissipation: The LTC4257CS8-1#PBF is optimized for low power dissipation, which is critical for maintaining efficiency and preventing overheating in PoE systems.
• Small Form Factor: Packaged in a compact SO-8 package, this IC saves valuable board space and is suitable for dense PCB layouts.

Applications

The LTC4257CS8-1#PBF is ideal for a wide range of applications within the realm of PoE. It can be used in VoIP phones, wireless network access points, IP cameras, and other network devices that require power to be supplied over the Ethernet cable. Its small footprint and compliance with the IEEE 802.3af standard make it a versatile choice for designers looking to integrate PoE functionality into their products.

Product Specifications

This product is encapsulated in an 8-lead SOIC package, with a part number LTC4257CS8-1#PBF. It is designed to operate over a broad temperature range, ensuring performance and reliability in various environmental conditions. The LTC4257CS8-1#PBF also includes features such as under-voltage lockout, thermal protection, and a two-event classification, which are essential for maintaining the integrity and safety of the PoE system.

With its combination of features and compliance with industry standards, the LTC4257CS8-1#PBF from Linear Technology is an excellent choice for designers and engineers looking to incorporate PoE capabilities into their next project.