MAX250ESD

Overview

The MAX250ESD is a single-channel, isolated RS-232 transceiver manufactured by Analog Devices Inc. (Maxim Integrated). It integrates an on-chip DC-DC converter to generate the required internal voltage rails from a single +5V supply, eliminating the need for external charge pumps or dual power sources. The device provides one driver and one receiver with galvanic isolation between the logic interface and the serial port. Key electrical specifications include a data rate of 120kbps, a supply current of 10mA, and operation within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated DC-DC converter eliminates the requirement for external negative voltage supplies or charge pump circuits.
• Provides galvanic isolation between the microprocessor logic side and the RS-232 serial port interface.
• Features low-power consumption suitable for battery-operated systems.

Applications

• Industrial control systems requiring signal isolation.
• Portable equipment and battery-powered devices.
• Medical instrumentation needing safety isolation.

Procurement Notes

Verify the specific suffix 'ESD' against the manufacturer's official documentation to confirm package type and temperature grade. Ensure compatibility with system isolation requirements and verify that the single +5V supply rail meets the design constraints before procurement.

Selection Notes

Select this component when a single-supply isolated RS-232 solution is required. Compare against non-isolated alternatives if isolation is unnecessary. Verify that the 120kbps speed meets application needs and check pinout compatibility with existing PCB layouts.

Part Context

This part belongs to the MAX250/MAX251 family of isolated RS-232 transceivers. The MAX251 variant typically offers additional features such as shutdown modes or different packaging options compared to the standard MAX250 configuration.

Replacement Considerations

MAX250CSD

FAQ

Does the MAX250ESD require an external negative voltage supply?

No, the device includes an integrated DC-DC converter that generates the necessary internal voltages from a single +5V supply.

What is the maximum data transmission rate supported?

The MAX250ESD supports data rates up to 120kbps.