MAX250EJD

Overview

The MAX250EJD is a CMOS RS-232 transceiver designed for high-noise data communications and industrial control systems. It operates on a single +5V power supply and provides two drivers and two receivers with full-duplex communication capabilities. The device supports data rates up to 19.2 kbaud and features Schmitt trigger inputs for noise immunity. It includes a shutdown mode that reduces power consumption to 5µW. The component is housed in a 14-pin plastic DIP package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated isolation interface simplifies design by handling logic signals and optocoupler connections
• Push-pull transformer driver capability enables efficient signal transmission across isolation barriers
• Low-power shutdown mode significantly reduces energy consumption during idle periods
• Schmitt trigger inputs provide enhanced noise rejection for reliable operation in harsh environments

Applications

• High-noise data communications links
• Industrial control system interfaces
• Data links connecting analog circuits with different ground potentials

Procurement Notes

Verify the specific suffix EJD against official documentation to confirm the package type and temperature grade. Ensure compatibility with existing PCB footprints for the 14-pin DIP configuration. Confirm availability status through authorized distributors as lead times may vary. Validate RoHS compliance requirements if applicable to the target assembly process.

Selection Notes

Select this component when designing isolated RS-232 interfaces requiring low cost and minimal external components. It is suitable for applications needing dual channels with push-pull outputs. Consider the 19.2 kbaud speed limit when evaluating higher-speed alternatives. Verify that the single +5V supply aligns with the system power architecture.

Part Context

The MAX250 is part of the MAX250/MAX251 chipset, where the MAX250 handles logic processing and the MAX251 manages RS-232 levels. This pairing allows for complete galvanic isolation using external optocouplers and transformers. The series is known for reducing component count compared to traditional discrete isolation solutions.

Replacement Considerations

MAX250EPD+