MAX3222CWN+

Overview

The MAX3222CWN+ is a low-power, true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +3.0V to +5.5V supply and features an internal dual charge pump requiring only four 0.1µF external capacitors. The device provides two drivers and two receivers with full-duplex communication capability. It guarantees data rates up to 120kbps under worst-case loads, with typical operation reaching 235kbps. The component is housed in an 18-pin Wide SOIC package and supports an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• Low power consumption with shutdown mode reducing supply current below 1µA
• Compatible with industry-standard MAX242 pinout and functionality

Applications

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

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature range (0°C to +70°C) and 'W' denotes the Wide SOIC package. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors before procurement. Ensure ordering matches the exact part number to guarantee correct electrical characteristics and physical dimensions.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 standards using a single voltage supply. It serves as a drop-in replacement for legacy MAX232 designs while offering improved power efficiency. Consider the 18-pin Wide SOIC package constraints for PCB layout. Verify that the required data rate does not exceed 235kbps for optimal performance without additional modifications.

Part Context

This device belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of low-power RS-232 transceivers. The MAX3222 variant specifically provides two drivers and two receivers, distinguishing it from higher-channel models like the MAX3241. It maintains functional compatibility with older MAX232 components while supporting modern low-voltage applications.

Replacement Considerations

The MAX3222CWN+ is functionally compatible with the MAX232. Designers replacing legacy parts should verify that the new charge pump capacitor requirements are met and that the shutdown control pins are properly managed if previously unused.