MAX251ESD+T

Overview

The MAX251ESD+T is a single RS-232 transceiver from the MAX250/MAX251 chipset, designed for low-cost, high-integration isolated serial communication. It operates on a single +5V supply and supports data rates up to 19.2 kbaud. The device features Schmitt trigger inputs for noise immunity and push-pull outputs. It includes an enable pin for three-state operation and a shutdown mode that reduces power consumption to 5μW. Packaged in a 14-pin SOIC (ESD) surface-mount format, it requires external isolation components such as optocouplers and transformers.

Feature Summary

• Provides complete RS-232 signal conversion with integrated logic processing
• Supports electrical isolation via external transformer and optocoupler interfaces
• Features Schmitt trigger receivers for enhanced noise rejection
• Includes shutdown capability for ultra-low standby power consumption

Applications

• Telecommunication equipment requiring safety-compliant isolation
• Industrial control systems operating in high-noise environments
• Data communication links needing galvanic isolation between logic and line drivers

Procurement Notes

Verify the component against the official Analog Devices / Maxim Integrated datasheet to confirm pinout compatibility and functional specifications. Ensure the ordering suffix matches the required package type and temperature range. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and current availability status before finalizing procurement.

Selection Notes

Select this component when designing isolated RS-232 interfaces that require minimal external circuitry. It is suitable for applications needing a single +5V supply and robust noise immunity. Consider the need for external isolation components like transformers and optocouplers during the schematic design phase to ensure proper system integration and compliance with telecommunication safety standards.

Part Context

This component belongs to the MAX250/MAX251 family of isolated RS-232 transceivers. The MAX251 specifically handles the RS-232 level translation side of the interface, while the MAX250 manages the logic and isolation drive signals. Together, they form a complete chipset solution for creating electrically isolated serial communication channels without complex discrete component arrangements.

Replacement Considerations

Direct replacements within the same isolated RS-232 category include the MAX250 paired with appropriate isolation components. Verify pinout compatibility and electrical characteristics against the original design requirements before substituting.