MAX253CUA+T

Power Management - Specialized Overview

The MAX253CUA+T is a monolithic oscillator and power driver designed to provide isolated power for isolated RS-485 or RS-232 data interfaces. It integrates an oscillator and a half-bridge driver to excite a center-tapped transformer primary from a single 5V supply. The device operates with a supply voltage range of 2.5V to 6V and features a non-inverting configuration. It delivers an output current of 1A with an operating supply current of 450µA. The component is housed in an 8-pin UMAX package and supports surface-mount installation.

Power Management - Specialized Feature Summary

• Integrates oscillator and half-bridge driver for primary-side transformer excitation
• Provides isolated power for RS-485 and RS-232 interface applications
• Operates from a single low-voltage supply without requiring external components

Power Management - Specialized Applications

• Isolated RS-485 interface power supply
• Isolated RS-232 interface power supply
• Primary-side drive for isolated communication transceivers

Power Management - Specialized Procurement Notes

Verify the specific suffix '+T' indicates tape-and-reel packaging when sourcing. Confirm the manufacturer designation as Analog Devices Inc./Maxim Integrated to ensure authenticity. Check RoHS compliance status against current regulatory requirements. Ensure the UMAX-8 package type matches your PCB footprint design constraints prior to procurement.

Power Management - Specialized Selection Notes

Select this component when designing isolated serial communication links requiring integrated oscillator and driver functionality. It is suitable for applications needing a compact solution for driving small center-tapped transformers. Consider the 450µA supply current for low-power system designs. Verify that the 1A output current capability meets the transformer primary drive requirements of the target interface standard.

Power Management - Specialized Part Context

The MAX253 belongs to a family of transformer drivers specifically engineered for isolated digital interfaces. Unlike general-purpose gate drivers, it combines frequency generation with power amplification. This integration reduces component count in isolated RS-485 and RS-232 designs. The UMAX package offers a compact form factor suitable for space-constrained industrial and communication equipment.

Power Management - Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult official Analog Devices resources for cross-reference information if direct replacement is required.