MAX3222EWN+

Overview

The MAX3222EWN+ is a low-power, true RS-232 transceiver manufactured by Analog Devices/Maxim Integrated. It operates from a single 3.0V to 5.5V supply and features two drivers and two receivers for full-duplex communication. The device utilizes an internal dual charge pump requiring only four 0.1µF external capacitors. It guarantees data rates up to 120kbps with worst-case loads, typically supporting 235kbps. The E suffix indicates an extended temperature range of -40°C to +85°C. It is housed in an 18-pin Wide SOIC package (SO-Wide-18) and includes a shutdown mode that reduces supply current to less than 1µA.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• Shutdown mode significantly reduces power consumption while keeping receivers active
• Compatible with industry-standard MAX242 pinouts and functionality

Applications

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

Procurement Notes

Verify the ordering suffix 'E' confirms the -40°C to +85°C industrial temperature rating. Confirm the 'W' suffix corresponds to the 18-pin Wide SOIC package. Ensure the '+' suffix indicates lead-free compliance. Cross-reference the manufacturer part number with official Analog Devices documentation to validate authenticity before purchase.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 standards using a single low-voltage supply. It is suitable for designs requiring compatibility with legacy MAX232/MAX242 footprints. Consider the 120kbps guaranteed rate for standard serial applications. Verify capacitor requirements match the specific supply voltage used in the design.

Part Context

This device belongs to the MAX3222 family of low-power RS-232 transceivers. It shares functional similarities with the MAX3232 but differs in receiver availability. The MAX3222EWN+ specifically denotes the wide operating temperature variant in a surface-mount wide SOIC package. It serves as a drop-in replacement for older generation RS-232 drivers in portable electronics.

Replacement Considerations

The MAX3222CWN+ is the commercial temperature version (-40°C to +70°C). The MAX3232 series offers identical driver/receiver counts but lacks receiver outputs. The MAX232 and MAX242 are functionally compatible predecessors.