MAX251CSD+T

Overview

The MAX251CSD+T is an RS-232 line transceiver designed for use with the MAX250 to form a low-cost, high-integration isolated interface. Operating on a single +5V supply, it provides dual drivers and dual receivers supporting data rates up to 19.2kbps. The device features push-pull transformer drivers and includes a shutdown mode that reduces power consumption to 5µW. It utilizes Schmitt trigger inputs for noise immunity and supports three-state outputs via an enable control pin.

Feature Summary

• Integrated dual driver and dual receiver channels for bidirectional communication
• Push-pull transformer drivers simplify external isolation circuitry
• Schmitt trigger inputs provide enhanced noise rejection
• Shutdown mode enables ultra-low power standby operation

Applications

• Telecommunication equipment requiring electrical isolation
• Industrial control systems in high-noise environments
• Data communication interfaces needing galvanic isolation

Procurement Notes

Verify the component against official Analog Devices documentation to confirm specifications. Ensure compatibility with the MAX250 controller for proper system integration. Check package markings for authenticity and review environmental compliance certifications prior to procurement.

Selection Notes

Select this component when designing isolated RS-232 links requiring minimal external parts. It pairs specifically with the MAX250 logic controller. Verify that the required data rate does not exceed 19.2kbps and that the application environment supports the specified operating temperature range.

Part Context

This part belongs to the MAX250/MAX251 family of isolated RS-232 transceivers. It serves as the interface stage in a two-chip solution where the MAX250 handles logic processing and the MAX251 manages signal levels. This architecture replaces older multi-component discrete isolation designs.

Replacement Considerations

Direct replacements include other variants within the MAX250/MAX251 series such as the MAX251ESA or MAX251CPE. Ensure the substitute maintains the same UCSP or standard packaging requirements and matches the thermal characteristics of the original design.