MAX241EEWI+

Overview

The MAX241EEWI+ is a full-duplex RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +5V supply, utilizing an integrated charge pump to generate the required ±10V internal voltages without external bipolar supplies. The device features four drivers and five receivers, supporting data rates up to 120kbps. It provides high electrostatic discharge protection of ±15kV via the Human Body Model. The component includes a low-power shutdown mode with typical supply current of 1μA. It is housed in a 28-pin SOIC package and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump circuitry enables operation from a single +5V supply, eliminating the need for external bipolar voltage sources.
• High robustness against electrostatic discharge with ±15kV HBM protection on all RS-232 inputs and outputs.
• Low-power shutdown mode significantly reduces supply current consumption to approximately 1μA.
• Internal pull-up resistors on driver inputs simplify interface connections for unused channels.

Applications

• Battery-powered equipment requiring low power consumption
• Hand-held diagnostic devices
• Portable instrumentation systems

Procurement Notes

Verify the specific suffix 'EWI+' corresponds to the 28-pin SOIC package and industrial temperature grade (-40°C to +85°C). Confirm RoHS compliance status through official manufacturer documentation or authorized distributor certificates prior to procurement. Ensure the ordering part number matches the exact pinout and electrical specifications required for the design.

Selection Notes

Select this component when a full-duplex RS-232 interface is needed with four transmit and five receive channels. It is suitable for designs constrained by board space due to its integrated charge pump. Consider the ±15kV ESD rating for environments with frequent connector mating. Verify that the 120kbps data rate meets system requirements and that the 28-pin SOIC footprint fits the PCB layout.

Part Context

The MAX241E belongs to the Maxim Integrated MAX202E–MAX213E family of RS-232 transceivers. This family shares common architecture features such as single-supply operation and integrated charge pumps. The MAX241E specifically differentiates itself by offering four drivers and five receivers, providing more I/O flexibility compared to standard dual-driver variants like the MAX232E.

Replacement Considerations

Publicly confirmed parameter-equivalent substitutes include the MAX211EEWI+. Both devices share identical pinouts, electrical characteristics, and package types. Designers should verify that any replacement maintains compatibility with existing PCB footprints and software configurations.