MAX253CPA

Power Management - Specialized Overview

The MAX253CPA 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. The device features a half-bridge configuration with two drivers and two outputs, delivering an output current of 1 A. It operates within a supply voltage range of 2.5 V to 6 V and consumes 450 uA of operating supply current. Power dissipation is rated at 727 mW. The component supports non-inverting configuration and functions within a temperature range of 0°C to +70°C.

Power Management - Specialized Feature Summary

• Integrates oscillator and power driver for isolated interface applications
• Drives center-tapped transformer primary for galvanic isolation
• Supports standard 5V and 3.3V DC power supply inputs
• Provides high-current output capability for transformer excitation

Power Management - Specialized Applications

• Isolated RS-485 interface power supply
• Isolated RS-232 interface power supply
• Primary-side transformer drive in isolated communication systems

Power Management - Specialized Procurement Notes

Verify the specific suffix designation when sourcing replacements, as the base part number may be obsolete. Confirm RoHS compliance status through official documentation, as legacy versions may differ. Ensure the supplier provides valid traceability for Analog Devices/Maxim Integrated products. Cross-reference the exact package type and temperature grade against project requirements before finalizing procurement.

Power Management - Specialized Selection Notes

Select this component for designs requiring integrated oscillation and driving capabilities for isolated transformers. Consider the PDIP-8 package constraints for PCB layout. Evaluate the thermal performance given the 727 mW power dissipation rating. Verify that the required supply voltage falls within the 2.5 V to 6 V operational window. Assess the 1 A output current sufficiency for the target transformer's primary impedance.

Power Management - Specialized Part Context

The MAX253 belongs to the Maxim Integrated family of specialized interface drivers. It is categorized under Half-Bridge Drivers within the PMIC segment. The device addresses the need for compact, low-component-count solutions for isolated serial communication links. Its integration of oscillator and driver functions reduces board space compared to discrete implementations.

Power Management - Specialized Replacement Considerations

MAX253CPA+