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MAX253ESA from MAXIM,MAXIM - Dallas Semiconductor

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MAX253ESA

Manufacturer: MAXIM, MAXIN

Transformer Driver for Isolated RS-485 Interface

Partnumber Manufacturer Quantity Availability
MAX253ESA MAXIM, MAXIN 1006 In Stock

Description and Introduction

Transformer Driver for Isolated RS-485 Interface **Manufacturer:** Maxim Integrated (now part of Analog Devices)  

**Part Number:** MAX253ESA  

### **Specifications:**  
- **Type:** Transformer Driver for Isolated Power Supplies  
- **Operating Voltage Range:** 4.5V to 5.5V  
- **Output Voltage:** Adjustable (depends on external transformer)  
- **Switching Frequency:** 500kHz (typical)  
- **Output Current:** Up to 500mA (peak)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-pin SOIC (Small Outline Integrated Circuit)  
- **Efficiency:** High (depends on external components)  
- **Primary Features:**  
  - Push-pull transformer driver  
  - Low power consumption  
  - Soft-start capability  
  - Overcurrent protection  

### **Descriptions:**  
The MAX253ESA is a transformer driver designed for isolated power supply applications. It provides a high-frequency signal to drive an external transformer, enabling efficient power conversion in compact designs. It is commonly used in telecom, industrial, and medical applications where isolation is required.  

### **Features:**  
- Push-pull output stage for driving center-tapped transformers  
- Adjustable switching frequency  
- Low quiescent current  
- Built-in soft-start to reduce inrush current  
- Overcurrent protection for enhanced reliability  
- Compact SOIC package for space-constrained designs  

This information is based on the manufacturer's datasheet.

Application Scenarios & Design Considerations

Transformer Driver for Isolated RS-485 Interface

Alternative Part Number

  • SN6501DBVR --: Pin-compatible transformer driver for isolated power supplies, functionally equivalent to the MAX253 and widely available.
  • SN6505BDBVR --: Higher-current transformer driver in the same family, drop-in upgrade for isolated supply designs using the MAX253.
  • LT3439EFE --: Low-noise push-pull isolated DC-DC transformer driver offering similar functionality for isolated power applications.

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