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 single half-bridge driver with a 1 A output current capability. Operating voltage ranges from 2.5 V to 6 V, with an operating supply current of 450 uA. Power dissipation is rated at 727 mW. It operates within a temperature range of 0°C to +70°C and is housed in an 8-PDIP package.

Power Management - Specialized Feature Summary

• Provides isolated power for RS-485 and RS-232 interfaces
• Drives center-tapped transformer primaries
• Integrates oscillator and power driver functions

Power Management - Specialized Applications

• Isolated RS-485 interface power supplies
• Isolated RS-232 interface power supplies
• Transformer-driven isolated communication circuits

Power Management - Specialized Procurement Notes

Verify the specific suffix (+) indicates lead-free compliance when sourcing replacements. Confirm the PDIP-8 through-hole package matches the target PCB footprint. Ensure the operating temperature range meets system requirements. Check manufacturer documentation for any pinout variations between legacy and current production batches.

Power Management - Specialized Selection Notes

Select this component for applications requiring integrated oscillation and transformer driving for serial isolation. Compare against discrete solutions for size and cost efficiency. Verify that the 1 A peak drive current satisfies the transformer primary impedance requirements. Consider the non-inverting configuration relative to control logic levels.

Power Management - Specialized Part Context

This part belongs to the MAX253 series of transformer drivers. It is manufactured by Analog Devices Inc./Maxim Integrated. The device simplifies isolated power design by combining oscillator and driver stages. It is commonly used in industrial communication systems requiring galvanic isolation.

Power Management - Specialized Replacement Considerations

Direct substitutes include other MAX253 variants such as the MAX253ESA-. Verify package compatibility and electrical specifications before substitution.