MAX222EWN+

Overview

The MAX222EWN+ is a dual-channel RS-232 transceiver from the MAX220–MAX249 family, designed for EIA/TIA-232E and V.28/V.24 interfaces without requiring external bipolar supplies. It operates on a single +5V supply (4.5V to 5.5V) using an internal charge pump to generate ±10V. The device features two drivers and two receivers with full-duplex communication at data rates up to 200kbps. It includes a shutdown mode reducing current to 10µA maximum. The component is housed in a 16-pin Wide SO package and supports an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge-pump circuitry eliminates the need for external capacitors or bipolar power supplies.
• Single-supply operation enabled by internal voltage conversion from +5V to ±10V.
• Shutdown mode significantly reduces power consumption for battery-operated applications.

Applications

• Interface translation between TTL/CMOS logic and RS-232 standards
• Multidrop RS-232 network connections
• Portable diagnostic equipment

Procurement Notes

Verify the specific suffix 'EWN+' against the manufacturer's official ordering information table to confirm the package type and temperature grade. Ensure the procurement source provides valid RoHS compliance documentation. Confirm that the component matches the exact pinout and electrical specifications required for the target design.

Selection Notes

Select this component when board space is limited due to the integrated charge pump eliminating external components. It is suitable for systems requiring only a single +5V supply rail. Verify that the required data rate does not exceed 200kbps and that the operating environment falls within the specified temperature range.

Part Context

This part belongs to the MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. The family offers various channel counts and packages. The MAX222 specifically provides two drivers and two receivers, distinguishing it from single-channel or higher-channel variants within the same series.

Replacement Considerations

Direct replacements within the same family include the MAX222ACN+, MAX222APG+, and MAX222EEPA+. These parts share identical functionality but differ in package style or temperature rating. Verify pin compatibility before substitution.