MAX242EWN+

Overview

The MAX242EWN+ is a +5V-powered, multichannel RS-232 driver and receiver integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within the MAX220–MAX249 family and supports EIA/TIA-232E and V.28/V.24 communication interfaces. The device features two drivers and two receivers with an integrated charge pump that eliminates the need for external bipolar ±12V supplies. It functions on a single +5V supply, achieving data rates up to 200 kbps. The component includes a shutdown mode consuming as low as 5μW and is housed in an 18-pin Wide SOIC package.

Feature Summary

• Integrated charge pump circuitry enables single-supply operation from +5V without requiring external bipolar voltage sources.
• Includes a low-power shutdown mode designed to minimize energy consumption during periods of inactivity.
• Provides tristatable receivers that remain active under shutdown conditions to support multidrop network applications.

Applications

• Interface translation between TTL/CMOS logic levels and RS-232 standards
• Multidrop RS-232 networks utilizing shared bus architectures
• Portable diagnostics equipment requiring low power consumption

Procurement Notes

Verify the specific suffix 'EWN+' against the manufacturer's current ordering guide to confirm the exact temperature range and RoHS compliance status. Confirm availability through authorized distributors as lead times may vary based on production schedules.

Selection Notes

Select this component when designing systems that require RS-232 connectivity but lack negative voltage rails. Ensure the application environment falls within the specified operating temperature limits for the 'E' or 'C' grade variant. Verify that the required data rate does not exceed the maximum supported speed for the selected load conditions.

Part Context

This part belongs to the MAX220–MAX249 family of line drivers and receivers. These components are engineered for communications interfaces where generating high-voltage swings from a standard logic supply is necessary. The family offers various pin counts and packages to accommodate different channel requirements and board space constraints.

Replacement Considerations

Compatible substitutes within the same family include the MAX232EWN+ and MAX222EWN+. When replacing, verify that the pinout configuration matches exactly and that the thermal characteristics of the new unit align with the existing design parameters.