MAX251EPD

Overview

The MAX251EPD+ is an RS-232 interface transceiver manufactured by Analog Devices Inc. under the Maxim Integrated brand, designed for use in industrial and commercial applications. It operates on a single +5V power supply and supports data transmission rates up to 19.2 kbaud. The device features two drivers and two receivers, providing full-duplex communication capabilities. It includes a shutdown mode that reduces power consumption to 5µW. The component is housed in a 14-pin PDIP package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated isolation interface simplifies design by combining logic signal processing with optical coupling requirements
• Push-pull transformer driver capability enables efficient signal transmission across isolation barriers
• Low-power shutdown mode significantly reduces energy consumption during idle periods
• Output enable control allows flexible configuration for tri-state operation

Applications

• Data communication systems requiring electrical isolation in high-noise environments
• Industrial control networks utilizing isolated serial interfaces
• Analog circuit interfacing where galvanic isolation is necessary

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature grade. Ensure compatibility with existing isolation components such as optocouplers and transformers required for system implementation. Confirm RoHS compliance status through manufacturer specifications before procurement.

Selection Notes

Select this component when designing isolated RS-232 links requiring minimal external parts. Consider the need for external isolation components like optocouplers and transformers which are not integrated into the chip itself. Evaluate power budget constraints given the 500µA operating current and 5µW shutdown requirement.

Part Context

The MAX251EPD+ belongs to the MAX250/MAX251 family of low-cost, high-integration isolated RS-232 driver/receiver chips. This series is engineered to simplify isolation interface designs by handling logic signals and optical interfaces, while the companion MAX251 handles RS-232 level conversion.

Replacement Considerations

Direct replacements within the same family include the MAX250EPD+. Verify pinout compatibility and functional equivalence with other isolated RS-232 transceivers if considering alternative manufacturers.