MAX3241EWI+

Overview

The MAX3241EWI+ is a true RS-232 transceiver from Analog Devices/Maxim Integrated, housed in a 28-pin Wide SOIC package. It operates on a single 3.0V to 5.5V supply and includes an internal dual charge pump requiring only four 0.1µF external capacitors. The device features three drivers and five receivers, supporting data rates up to 120kbps with guaranteed RS-232 output levels under worst-case loads of 3kΩ parallel 1000pF. Typical operation reaches 235kbps. It provides 1µA shutdown current, 15kV ESD protection, and complementary receiver outputs for monitoring.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• Complementary receiver outputs enable external device monitoring without forward biasing protection diodes
• Low-power shutdown mode reduces supply current to less than 1µA while maintaining receiver activity

Applications

• Battery-powered equipment
• Hand-held devices
• Peripherals
• Datacom equipment

Procurement Notes

Verify the specific suffix 'EWI+' confirms the Wide SOIC package and -40°C to +85°C industrial temperature range. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Ensure ordering details match the required pin configuration and lead-free specifications before procurement.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 ports requiring multiple transmitter and receiver channels. It is suitable for applications needing low-voltage operation down to 3.0V and high ESD tolerance. Consider alternatives if higher data rates beyond 235kbps are required or if a different package footprint is necessary.

Part Context

This part belongs to the MAX32xx family of low-power, true RS-232 transceivers. It shares functional compatibility with industry-standard parts like the MAX232 but offers improved performance at lower voltages. The MAX3241 variant specifically provides 3 drivers and 5 receivers, distinguishing it from the 2x2 configurations of the MAX3222/MAX3232.

Replacement Considerations

MAX3241EAI+ (SSOP package), MAX3241EUI+ (TSSOP package). These variants share identical electrical characteristics and functionality but differ in physical package dimensions.