MAX253EUA+

Power Management - Specialized Overview

The MAX253EUA+ is a monolithic oscillator and power driver designed to provide isolated power for isolated RS-485 or RS-232 data interfaces. It drives a center-tapped transformer primary from a 5V or 3.3V DC supply. The device operates with a supply voltage range of 2.5V to 6V and draws an operating supply current of 450µA. It features a non-inverting configuration, delivers 1A output current, and dissipates up to 727mW. Operating temperatures range from -40°C to +85°C in an 8-uMAX package.

Power Management - Specialized Feature Summary

• Integrates oscillator and H-bridge driver for primary-side transformer excitation
• Provides galvanic isolation for RS-485 and RS-232 interface power supplies
• Supports both 3.3V and 5V logic-level input signals

Power Management - Specialized Applications

• Isolated RS-485 transceiver power supply
• Isolated RS-232 transceiver power supply
• Industrial communication interface isolation

Power Management - Specialized Procurement Notes

Verify the specific suffix 'EUA+' confirms the 8-pin uMAX surface-mount package variant. Confirm RoHS compliance status through official documentation as lead times may vary. Ensure the design supports the required transformer center-tap configuration for proper operation.

Power Management - Specialized Selection Notes

Select this component when a compact, low-power solution is needed to generate isolated DC voltage for serial communication interfaces. It eliminates the need for separate oscillator circuits by integrating drive functionality directly into the driver stage suitable for small transformers.

Power Management - Specialized Part Context

Part of the MAX253 family of transformer drivers. This series focuses on providing efficient, isolated power solutions for standard industrial communication protocols requiring galvanic separation between data lines and ground references.

Power Management - Specialized Replacement Considerations

Check for MAX253CPA+ (DIP-8) if through-hole mounting is required instead of surface mount. Verify pinout compatibility before substituting with other half-bridge drivers.