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The SI3402-B-GMR is a PoE (Power over Ethernet) interface IC designed to support IEEE 802.3af and IEEE 802.3at standards. It facilitates the safe delivery of power to powered devices (PDs) such as IP cameras, VoIP phones, and wireless access points via standard Ethernet cables. Functions 1. Power Detection: It detects the presence of Power Sourcing Equipment (PSE) and negotiates power requirements using the classification signature. 2. Power Management: It manages the power delivery to ensure compliance with the PoE standards, ensuring that power is supplied efficiently and safely. 3. Status Indication: It provides status outputs for power negotiation states and fault conditions. 4. Protection Features: Includes over-voltage protection, over-temperature protection, and short-circuit protection. 5. Low Quiescent Current: Maintains low power consumption when not actively supplying power. Applications - IP Cameras - VoIP Phones - Wireless Access Points - Smart Home Devices - Industrial Automation Equipment - IoT Devices Alternative Parts - SI3401: Similar functionality, with minor differences in specifications. - LTC4267: Another PoE interface chip from Linear Technology with comparable features. - MAX5952: A power management IC with PoE support from Maxim Integrated. - TPS23754: A PoE PD interface chip from Texas Instruments. Embedded Modules - SI3402-compatible evaluation modules for testing. - Reference designs provided by Skyworks that incorporate the SI3402 in PoE applications. - Development kits that include additional support components for interface and evaluation. Related Q&A 1. Q: What are the main features of the SI3402-B-GMR? A: The SI3402-B-GMR features power detection, power management compliant with IEEE 802.3af/at, multiple protection mechanisms, and low quiescent current operation. 2. Q: What types of devices can utilize the SI3402-B-GMR? A: The SI3402-B-GMR is commonly used in devices such as IP cameras, VoIP phones, wireless access points, and other networked devices that require power delivery over Ethernet. 3. Q: How does the SI3402-B-GMR handle power negotiation? A: The SI3402-B-GMR detects the presence of a Power Sourcing Equipment (PSE) and communicates with it to negotiate the required power through a classification process according to PoE standards. 4. Q: Are there any important safety features built into the SI3402-B-GMR? A: Yes, the SI3402-B-GMR includes several safety features such as over-voltage protection, over-temperature protection, and short-circuit protection to ensure safe operation. 5. Q: What are some alternatives to the SI3402-B-GMR for Power-over-Ethernet applications? A: Alternatives to the SI3402-B-GMR include the SI3401, LTC4267, MAX5952, and TPS23754, each offering similar PoE functionality with varying specifications.