MAX253

PRODUCTION

1W Primary-Side Transformer H-Bridge Driver for Isolated Supplies

Data Sheet (Rev. 3) Product Selection Table

Part Models: 14
1ku List Price: Starting From $2.14

Viewing:

Overview

Simple Power-Supply Transformer Driver Design for Isolated RS-485/RS-232 Data-Interface Applications
- Single 5V or 3.3V Supply
- Low-Current Shutdown Mode: 0.4µA
- Pin-Selectable Frequency: 350kHz or 200kHz
8-Pin DIP, SO, and µMAX^® Packages Take Minimal Board Space

The MAX253 monolithic oscillator/power-driver is specifically designed to provide isolated power for an isolated RS-485 or RS-232 data interface. The device drives a center-tapped transformer primary from a 5V or 3.3V DC power supply. The secondary can be wound to provide any isolated voltage needed at power levels up to 1W.

The MAX253 consists of a CMOS oscillator driving a pair of N-channel power switches. The oscillator runs at double the output frequency, driving a toggle flip-flop to ensure 50% duty cycle to each of the switches. Internal delays are arranged to ensure break-before-make action between the two switches.

The SD pin puts the entire device into a low-power shutdown state, disabling both the power switches and oscillator.

Applications

Bridge Ground Differentials
High Noise-Immunity Communications Interface
Isolated and/or High-Voltage Power Supplies
Isolated RS-485/RS-232 Power Supply
Medical Equipment
Process Control
Transformer Driver

Part Models: 14
1ku List Price: Starting From $2.14

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX253CPA+	Plastic Dual-In-Line, Narrow (0.3in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX253CSA+	Small-Outline IC, Narrow (0.15in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX253CSA+T	Small-Outline IC, Narrow (0.15in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX253CUA+	Micro-MAX, Thin Shrink Small-Outline	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX253CUA+T	Micro-MAX, Thin Shrink Small-Outline	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX253EPA+	Plastic Dual-In-Line, Narrow (0.3in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX253ESA+	Small-Outline IC, Narrow (0.15in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX253ESA+T	Small-Outline IC, Narrow (0.15in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX253ESA/V+	Small-Outline IC, Narrow (0.15in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX253ESA/V+T	Small-Outline IC, Narrow (0.15in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX253EUA+	Micro-MAX, Thin Shrink Small-Outline	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX253EUA+T	Micro-MAX, Thin Shrink Small-Outline	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX253MJA	Ceramic Dual-In-Line, Narrow (0.3in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX253MSA/PR+	Small-Outline IC, Narrow (0.15in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jan 14, 2019 - 1702D ASSEMBLY
		pcn_1702d
MAX253CSA+	PRODUCTION
MAX253CSA+T	PRODUCTION
May 1, 2020 - 1753R ASSEMBLY
		pcn_1753r
MAX253CUA+	PRODUCTION
MAX253CUA+T	PRODUCTION
Aug 28, 2018 - 1702A ASSEMBLY
		pcn_1702a
MAX253ESA+	PRODUCTION
MAX253ESA+T	PRODUCTION
Sep 19, 2018 - 1753N ASSEMBLY
		pcn_1753n
MAX253EUA+	PRODUCTION
MAX253EUA+T	PRODUCTION
Oct 30, 2020 - 1702R2 ASSEMBLY
		pcn_1702r2
MAX253MSA/PR+	PRODUCTION	pcn_1702r2

This is the most up-to-date revision of the Data Sheet.

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Tools & Simulations

SPICE Model 1

MAX253 SPICE Macro Model

Latest Discussions

1 Years Ago

2 Years Ago

Overview

Documentation

Data Sheet 1

Reliability Data 1

Design Note 4

Technical Articles 5

Software Resources

Can't find the software or driver you need?

Tools & Simulations

SPICE Model 1

Latest Discussions

Recently Viewed