MAX251EJD

Overview

The MAX251EJD is a low-voltage RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +4.5V to +5.5V supply and includes internal charge pumps that generate ±6V for RS-232 output levels, eliminating the need for external components. The device features two drivers and two receivers, supporting data rates up to 120kbps. It utilizes Maxim's UCSP technology for compact surface-mount packaging in a 16-pin DIP format.

Feature Summary

• Integrated charge pump circuitry generates required negative voltage internally
• Supports standard RS-232 signaling with guaranteed output voltages
• Designed for operation on a single positive power supply rail

Applications

• Portable battery-powered equipment requiring serial communication
• Industrial control systems utilizing RS-232 interfaces
• Modem interface circuits in embedded applications

Procurement Notes

Verify the specific suffix 'J' indicates the military temperature range (-55°C to +125°C) and ceramic package construction. Confirm current availability status as legacy products may have limited distribution channels or require alternative sourcing strategies through authorized distributors.

Selection Notes

Select this component when a robust RS-232 interface is needed within a strict single-supply constraint without adding external inductors. Ensure the application environment requires the extended temperature range associated with the 'J' suffix variant compared to commercial grade alternatives.

Part Context

This part belongs to the MAX250/MAX251 family of low-voltage RS-232 transceivers. It serves as the dual-channel counterpart to the MAX250, providing two drivers and two receivers. The series is characterized by its reliance on internal charge pumps to achieve compliance with EIA/TIA-232-E standards.

Replacement Considerations

MAX250CPE: Single driver/receiver version. MAX232CPE: Requires external capacitors for charge pump.