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Analog Devices Inc./Maxim Integrated MAX5939RESA Environmental and export classification status description

The Maxim Integrated MAX5939RESA is a high-frequency, highest-power IEEE 802.3af-compliant PoE interface and current-limiting controller integrated circuit. It is designed for use in Power over Ethernet (PoE) applications. The IC combines both power sourcing equipment (PSE) controllers and powered device (PD) controllers in a single package. Functions: 1. Power over Ethernet (PoE) Interface: Provides power over ethernet functionality compliant with IEEE 802.3af standard. 2. Current-Limiting Controller: Regulates the current delivered to the device powered via PoE. 3. Integration: Combines PSE and PD controller functionalities in a single IC package. Applications: - IP Phones - Wireless Access Points - Security Cameras - Network Switches - Other PoE-enabled devices Alternative Components: - Texas Instruments TPS23861 – PoE Interface and Powered Device Controller - Linear Technology LT4275 – PoE Interface and Current-Limiting Controller Embedded Modules: - PoE/PoE+ Modules: These are modules that integrate the functionalities of PoE interface, current-limiting controller, and other components required for PoE applications into a single unit. --- Q&A Related to Maxim Integrated MAX5939RESA: 1. What is the maximum power output supported by the MAX5939RESA in PoE applications? The MAX5939RESA supports power delivery up to 15.4W, complying with the IEEE 802.3af standard. 2. How does the MAX5939RESA handle current limiting in PoE applications? The IC contains built-in circuitry for current monitoring and limiting to ensure safe power delivery to the connected device. 3. Can the MAX5939RESA be used for both PSE and PD applications simultaneously? Yes, the MAX5939RESA integrates both PSE and PD controller functionalities, making it suitable for use in PoE systems where a single device needs to handle both roles. 4. Are there any special heat dissipation or thermal considerations to be aware of when using the MAX5939RESA in high-power PoE applications? When used in high-power applications, proper heat sinking and thermal management are recommended to ensure the IC operates within its specified temperature range for optimal performance. 5. What are some typical protection features included in the MAX5939RESA to safeguard against overcurrent or overvoltage events in PoE systems? The MAX5939RESA integrates various protection mechanisms such as overcurrent protection, overvoltage protection, and thermal shutdown to prevent damage to the IC and connected devices during fault conditions.