MAX253CUA

Power Management - Specialized Overview

The MAX253CUA+ 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 within a supply voltage range of 2.5V to 6V, with a maximum output current of 1A. It features a non-inverting configuration and draws an operating supply current of 450µA. The component is housed in an 8-UMAX surface-mount package and supports operation temperatures from 0°C to +70°C.

Power Management - Specialized Feature Summary

• Provides isolated power for RS-485 and RS-232 interfaces via transformer drive
• Integrates oscillator and power driver functions in a single monolithic device
• Supports both 3.3V and 5V DC power supply inputs

Power Management - Specialized Applications

• Isolated RS-485 interface power supplies
• Isolated RS-232 interface power supplies
• Primary-side transformer driving for isolated communication

Power Management - Specialized Procurement Notes

Verify the specific suffix (e.g., CUAT vs CUA) against the required packaging format, as tape-and-reel options may be available. Confirm RoHS compliance status for the exact part number variant. Ensure the selected component matches the required temperature grade and package type for the target application design.

Power Management - Specialized Selection Notes

Select this component when designing isolated serial communication links requiring integrated oscillator and driver functionality. Consider the 1A output capability and UMAX package size for space-constrained designs. Verify that the load transformer matches the device's drive requirements and that the supply voltage falls within the specified 2.5V to 6V range.

Power Management - Specialized Part Context

The MAX253 belongs to a family of transformer drivers intended for isolated digital interfaces. It simplifies design by combining oscillation and power driving capabilities. The CUAVariant specifically denotes the commercial temperature range and UMAX packaging, distinguishing it from industrial variants or different package styles like SOIC-8.

Power Management - Specialized Replacement Considerations

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