MAX241EEWI

Overview

The MAX241EEWI+ is a single-supply RS-232 transceiver from Analog Devices/Maxim Integrated, housed in a 28-pin SOIC package. It operates on a +5V supply and includes four drivers and five receivers for full-duplex communication. The device supports data rates up to 120kbps with a typical propagation delay of 40µs. It features integrated charge pump circuitry requiring four 1µF external capacitors. Electrical characteristics include a typical supply current of 15mA and shutdown current of 10µA. The component provides ±15kV ESD protection via the Human Body Model and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated high ±15kV HBM ESD protection on driver outputs and receiver inputs
• Single +5V supply operation enabled by internal charge pump circuitry
• Low-power shutdown mode reduces supply current to approximately 1µA
• TTL/CMOS compatible logic levels with internal pull-up resistors on driver inputs

Applications

• Battery-powered equipment
• Hand-held devices
• Portable diagnostics equipment

Procurement Notes

Verify the specific suffix 'EWI+' against the manufacturer's official documentation to confirm the exact pinout, package dimensions, and RoHS compliance status. Ensure that the required four 1µF external capacitors are included in the bill of materials, as these are mandatory for the internal charge pump to function correctly. Cross-reference the ordering information section of the datasheet for any regional availability restrictions or lead time updates.

Selection Notes

Select this component when designing systems requiring four transmit channels and five receive channels on a single +5V rail. The MAX241E family is suitable for applications needing robust ESD protection without additional discrete components. Consider the 28-pin SOIC package constraints and the requirement for external 1µF capacitors when evaluating board space. Compare against other members of the MAX202E-MAX213E family if different driver/receiver counts or capacitor requirements are needed.

Part Context

The MAX241E belongs to a broader family of RS-232 transceivers including the MAX202E through MAX213E. These devices share common architecture features such as single-supply operation and integrated charge pumps. The 'E' designation indicates enhanced ESD protection compared to standard versions. This specific part number represents the industrial temperature grade variant in a surface-mount SOIC package, distinguishing it from commercial grades or alternative packaging options like SSOP or DIP.

Replacement Considerations

Direct functional substitutes within the same family include the MAX241C (commercial grade) or variants with different packages such as MAX241EEAI+. Verify compatibility regarding the number of drivers and receivers, as well as the specific voltage and temperature ranges required for the target application.