MAX222EWN

Overview

The MAX222EWN is a dual RS-232 line driver and receiver manufactured by Analog Devices Inc. under the Maxim Integrated brand, designed for EIA/TIA-232E communications interfaces. It operates from a single +5V supply using an integrated charge pump to generate internal ±10V rails, eliminating the need for external bipolar supplies. The device features two drivers and two receivers with full-duplex communication capability. Key electrical parameters include a data rate of up to 200 kbps, a typical transition slew rate of 12 V/µs, and a shutdown supply current of 10 µA maximum at +25°C. It supports TTL/CMOS input logic levels and provides continuous short-circuit protection on transmitter outputs.

Feature Summary

• Integrated charge pump circuitry eliminates the need for external components or bipolar power supplies
• Enables single-supply operation from a standard +5V source
• Includes a low-power shutdown mode to reduce overall system energy consumption

Applications

• Interface translation between TTL/CMOS logic and RS-232 standards
• Multidrop RS-232 network configurations
• Portable diagnostics equipment requiring compact form factors

Procurement Notes

Verify the specific suffix 'EWN' against official documentation to confirm the Wide SOIC package type and industrial temperature range (-40°C to +85°C). Ensure that ordering requirements match the exact manufacturer part number to avoid compatibility issues with pinouts or electrical characteristics in final designs.

Selection Notes

Select this component when board space is limited and external charge pump capacitors are undesirable. It is suitable for applications requiring robust RS-232 signaling without complex power management circuits. Consider the propagation delay and slew rate specifications if high-speed data integrity over long cable runs is critical for the specific application environment.

Part Context

This device belongs to the MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. The family offers various channel counts and packaging options to accommodate different interface density requirements while maintaining compatibility with standard serial communication protocols.

Replacement Considerations

The MAX232EWN serves as a direct functional substitute within the same product family, sharing identical pinouts and core electrical specifications.