MAX253MSA/PR

Power Management - Specialized Overview

The MAX253MSA/PR is a monolithic oscillator and power driver designed to provide isolated power for RS-485 or RS-232 data interfaces. It drives a center-tapped transformer primary from a 5V or 3.3V DC supply, delivering up to 1W of output power. The device features a non-inverting configuration with an operating supply voltage range of 2.5V to 6V. It operates within a temperature range of -40°C to +85°C, consumes 450µA of supply current, and dissipates 471mW of power. Packaged in an SOIC-8 surface-mount format.

Power Management - Specialized Feature Summary

• Integrates oscillator and H-bridge driver for isolated transformer excitation
• Supports both 3.3V and 5V logic supply voltages
• Delivers up to 1W of isolated power for interface circuits

Power Management - Specialized Applications

• Isolated RS-485 communication interfaces
• Isolated RS-232 serial communication links
• Powering primary-side components in isolated DC-DC converters

Power Management - Specialized Procurement Notes

Verify the suffix 'PR' against the official Analog Devices datasheet to confirm it denotes the specific tape-and-reel packaging variant rather than the standard tube. Ensure the component matches the RoHS compliance status indicated in the latest product change notices. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability before procurement.

Power Management - Specialized Selection Notes

Select this component when a compact solution is required to generate isolated power for serial communication transceivers without external discrete oscillators. It is suitable for designs requiring galvanic isolation between logic and communication lines. Consider the 1W power limit and thermal dissipation capabilities relative to the transformer selection and ambient operating conditions.

Power Management - Specialized Part Context

The MAX253 belongs to a family of transformer drivers specifically engineered for isolated serial interfaces. Unlike general-purpose gate drivers, it integrates the timing oscillator necessary to drive the transformer primary directly. This integration reduces component count and board space compared to discrete oscillator and driver solutions.

Power Management - Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.