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MAX253MJA is listed in the Power Management - Specialized range at ChipApex. The manufacturer field lists Analog Devices Inc./Maxim Integrated. Its product description is IC XFRMR DRIVER RS485 8-CDIP. Review the specifications below when checking this part for your BOM.
The MAX253MJA is a monolithic oscillator and power driver designed to provide isolated power for RS-485 or RS-232 data interfaces. It operates from a single supply voltage of 3.3V or 5V with a typical supply current of 450µA. The device integrates an oscillator and H-bridge driver to excite external isolation transformers, enabling galvanic isolation in serial communication systems.
Verify the specific suffix 'MJA' indicates the military-grade ceramic package variant when sourcing. Confirm that the component requires an external isolation transformer compatible with the internal drive frequency. Ensure design compatibility with the specified 3.3V or 5V operating range before integration into the power stage.
Select this component when galvanic isolation is required between microcontroller logic and serial bus lines. It serves as a complete power solution for the secondary side of isolation barriers. Consider thermal management within the ceramic package if operating near maximum temperature limits.
This part belongs to the Maxim Integrated family of isolated interface drivers. It complements standard transceivers by providing the necessary high-voltage AC drive for isolation transformers, replacing discrete oscillator and driver circuits in compact serial communication modules.
Public confirmed substitute part numbers are not available in the provided documentation.
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