MAX3222EPN+

Overview

The MAX3222EPN+ is a true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in an 18-pin Plastic DIP package. It operates from a single +3.0V to +5.5V supply and utilizes a dual charge pump with four 0.1µF external capacitors to generate internal ±5.5V rails. The device contains two drivers and two receivers, supporting full-duplex communication at guaranteed data rates up to 120kbps under worst-case loads (3kΩ || 1000pF). Typical operation reaches 235kbps. It features a shutdown mode reducing supply current to less than 1µA while keeping the receiver active for monitoring.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• Low-power shutdown mode extends battery life in portable applications
• Always-active complementary outputs enable external device monitoring without forward biasing protection diodes

Applications

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

Procurement Notes

Verify the ordering suffix 'E' indicates an extended temperature range of -40°C to +85°C. Confirm the 'PN+' designation corresponds to the 18-pin Plastic DIP package. Ensure compatibility with existing PCB footprints designed for industry-standard MAX232/MAX242 pinouts.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 standards using a single low-voltage supply. It serves as a direct drop-in replacement for legacy MAX232/MAX242 designs requiring improved power efficiency. Verify that the required data rate does not exceed 120kbps for guaranteed compliance under heavy loading conditions.

Part Context

This part belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of low-power RS-232 transceivers. It shares functional compatibility with the industry-standard MAX232 and MAX242 series but offers enhanced performance through proprietary low-dropout transmitter stages and reduced standby current consumption.

Replacement Considerations

Public confirmed substitutes include MAX3222CWN+, MAX3222CAP+, and MAX3222CPN+. These variants share identical electrical characteristics but differ in operating temperature ranges or package types.