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MAX5943AEEE from MAXIM,MAXIM - Dallas Semiconductor

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MAX5943AEEE

Manufacturer: MAXIM

FireWire Current Limiter and Low-Drop ORing Switch Controller

Partnumber Manufacturer Quantity Availability
MAX5943AEEE MAXIM 42 In Stock

Description and Introduction

FireWire Current Limiter and Low-Drop ORing Switch Controller The **MAX5943AEEE** is a Power over Ethernet (PoE) interface controller manufactured by **Maxim Integrated** (now part of Analog Devices). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Manufacturer:** Maxim Integrated  
- **Part Number:** MAX5943AEEE  
- **Package:** 16-QSOP (QSOP-16)  
- **Operating Voltage Range:** 2.7V to 13.2V  
- **Operating Temperature Range:** -40°C to +85°C  
- **Compliance:** IEEE 802.3af/at compliant  
- **Power Classification:** Supports PD (Powered Device) classification  
- **Power Dissipation:** Low power dissipation  

### **Descriptions:**
The MAX5943AEEE is a **PoE PD interface controller** designed for **Powered Devices (PDs)** in Power over Ethernet applications. It integrates detection, classification, and undervoltage lockout (UVLO) functions required for IEEE 802.3af/at compliance. It also includes a **power MOSFET gate driver** for an external N-channel MOSFET to control power delivery.

### **Features:**
- **IEEE 802.3af/at compliant** PD interface  
- **Integrated detection and classification**  
- **Programmable inrush current control**  
- **Supports both 2-event and 4-event classification**  
- **Undervoltage lockout (UVLO) with hysteresis**  
- **Thermal shutdown protection**  
- **Low power dissipation**  
- **Gate driver for external N-channel MOSFET**  
- **Wide input voltage range (2.7V to 13.2V)**  

This IC is commonly used in **IP phones, wireless access points, security cameras, and other PoE-powered devices**.  

Let me know if you need further details.

Application Scenarios & Design Considerations

FireWire Current Limiter and Low-Drop ORing Switch Controller

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