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MAX253CSA from MAXIM,MAXIM - Dallas Semiconductor

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MAX253CSA

Manufacturer: MAXIM

Transformer Driver for Isolated RS-485 Interface

Partnumber Manufacturer Quantity Availability
MAX253CSA MAXIM 244 In Stock

Description and Introduction

Transformer Driver for Isolated RS-485 Interface The MAX253CSA is a transformer driver manufactured by Maxim Integrated (now part of Analog Devices). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:  

### **Specifications:**  
- **Manufacturer:** Maxim Integrated (now Analog Devices)  
- **Part Number:** MAX253CSA  
- **Package:** 8-pin SOIC (Small Outline Integrated Circuit)  
- **Operating Temperature Range:** 0°C to +70°C  
- **Supply Voltage Range:** 4.5V to 5.5V  
- **Output Current:** Up to 350mA (peak)  
- **Switching Frequency:** Adjustable (typically 100kHz to 500kHz)  
- **Efficiency:** High efficiency for isolated power supply applications  
- **Applications:** Isolated power supplies, telecom, industrial controls, and medical equipment  

### **Description:**  
The MAX253CSA is a monolithic transformer driver designed for isolated power supply applications. It provides a compact and efficient solution for generating isolated voltages in systems requiring galvanic isolation. The device includes an oscillator, a power switch, and control circuitry to drive an external transformer.  

### **Features:**  
- **Integrated Power Switch:** Simplifies design by eliminating the need for an external MOSFET.  
- **Adjustable Oscillator Frequency:** Allows optimization for efficiency and component size.  
- **Low Power Consumption:** Suitable for battery-powered or energy-efficient applications.  
- **High Output Drive Capability:** Supports peak currents up to 350mA.  
- **Wide Input Voltage Range:** Operates from 4.5V to 5.5V, making it compatible with standard logic supplies.  
- **Compact SOIC Package:** Space-saving for PCB designs.  
- **Galvanic Isolation Support:** Ideal for applications requiring safety isolation.  

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

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 with similar drive capability and widely available.
  • SN6505BDBVR --: Higher-current transformer driver in the same family, offers improved drive strength and is a common drop-in upgrade for MAX253-based isolated supply designs.
  • LT3439EFE --: Low-noise push-pull transformer driver with comparable isolated power function, suitable as an alternative when higher performance or lower EMI is needed.
  • LT1301CS8 --: Isolated power supply transformer driver with similar function and SO-8 package, widely used as a MAX253 replacement.
  • DCP010505BP --: Isolated DC-DC converter module that can replace the MAX253-based isolated supply in many designs, simplifying the circuit.

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