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MAX5940BESA from MAXIM,MAXIM - Dallas Semiconductor

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MAX5940BESA

Manufacturer: MAXIM, MAX

IEEE 802.3af PD Interface Controller For Power-Over-Ethernet

Partnumber Manufacturer Quantity Availability
MAX5940BESA MAXIM, MAX 940 In Stock

Description and Introduction

IEEE 802.3af PD Interface Controller For Power-Over-Ethernet The MAX5940BESA is a power management IC manufactured by Maxim Integrated (now part of Analog Devices). Below are its specifications, descriptions, and features based on the available knowledge base:

### **Specifications:**  
- **Manufacturer:** Maxim Integrated (now part of Analog Devices)  
- **Part Number:** MAX5940BESA  
- **Package:** 8-pin SOIC (Small Outline Integrated Circuit)  
- **Input Voltage Range:** 36V to 57V (compatible with IEEE 802.3af standard)  
- **Output Voltage:** Adjustable (supports power sourcing equipment (PSE) applications)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Power Dissipation:** 727mW (typical)  
- **Compliance:** IEEE 802.3af Power over Ethernet (PoE) standard  

### **Descriptions:**  
The MAX5940BESA is a Power over Ethernet (PoE) controller designed for Power Sourcing Equipment (PSE). It provides detection, classification, and power management for PoE-compliant devices. It integrates all necessary functions to comply with IEEE 802.3af standards, including inrush current limiting, fault protection, and power monitoring.  

### **Features:**  
- **Complete PSE Solution:** Integrates detection, classification, and power control for PoE.  
- **IEEE 802.3af Compliant:** Ensures compatibility with PoE standards.  
- **Programmable Current Limit:** Protects against overloads and short circuits.  
- **Inrush Current Control:** Prevents excessive current during startup.  
- **Power Monitoring:** Provides real-time power measurement.  
- **Thermal Protection:** Prevents overheating.  
- **Low Power Dissipation:** Efficient power management.  
- **Single IC Solution:** Reduces external component count.  

This information is based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

IEEE 802.3af PD Interface Controller For Power-Over-Ethernet

Alternative Part Number

  • TPS2375D --: Pin-compatible IEEE 802.3af PoE PD controller with integrated detection and classification, widely used as a direct functional replacement for the MAX5940BESA.
  • LTC4267CDHC --: IEEE 802.3af PoE PD interface controller with similar detection, classification and hot-swap functionality, suitable for the same PoE powered-device applications.
  • SI3402-B-GM --: Integrated PoE PD interface and DC-DC controller covering the same 802.3af function set, offering a compact alternative with comparable electrical behavior.
  • LT4275AIDD --: IEEE 802.3af/at PoE PD interface controller offering similar detection, classification and hot-swap functionality in a comparable package.

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