78253/55MVC

Overview

The Murata Power Solutions 78253/55MVC is a specialty power transformer designed for surface-mount applications. It provides isolated power supply functionality compatible with the Maxim MAX253 chipset. The component features a single primary winding rated at 3.3V and a single secondary winding rated at 5V. It delivers a power rating of 1W with a secondary current rating of 200mA. The unit offers high isolation voltage up to 4kVDC and supports frequency ranges up to 500kHz. Physical dimensions are 9.52mm in length, 9mm in width, and 6.35mm in height.

Feature Summary

• Toroidal construction providing compact form factor
• High isolation voltage capability up to 4kVDC
• Compatible with industry-standard pinout configurations

Applications

• Isolated power supplies using Maxim MAX253 chipset
• General purpose DC-DC conversion modules
• Surface-mount board assembly systems

Procurement Notes

Verify the specific suffix (e.g., -R) against official Murata documentation to confirm packaging type such as tape and reel or tube. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the selected variant matches the required isolation and voltage specifications for the target design.

Selection Notes

Select this component when designing isolated power stages requiring compatibility with the MAX253 controller family. Consider the 3.3V input and 5V output configuration for standard logic level translation. Evaluate the 4kVDC isolation requirement against safety standards. Verify that the SMD package dimensions fit within the available PCB real estate constraints.

Part Context

This part belongs to the 78253 series of converter transformers manufactured by Murata Power Solutions. These components are engineered specifically to interface with Maxim integrated circuits, offering a complete solution for creating efficient isolated power converters in a small footprint suitable for modern electronic equipment.

Replacement Considerations

Official suggested alternates include the 78253/55JC-R. Verify electrical equivalence and physical compatibility before substitution.