MAX3221EIPWE4

Overview

The MAX3221EIPWE4 is a single-channel RS-232 line driver and receiver manufactured by Texas Instruments. It operates from a single 3-V to 5.5-V supply and includes on-chip charge pumps requiring only five external 0.1-uF capacitors. The device provides ±15-kV electrostatic discharge (ESD) protection on RS-232 inputs and outputs, exceeding the EIA/TIA-232-F standard requirement of ±15-kV air gap and ±8-kV contact discharge. It features an AutoShutdown feature that reduces supply current to less than 1 uA when the device is not in use. The package is a 16-pin TSSOP.

Feature Summary

• Integrated charge pump eliminates need for external inductors or dual supplies
• High ESD protection rating on all RS-232 pins
• AutoShutdown function minimizes power consumption during idle states
• Compatible with PC serial ports and handheld devices

Applications

• Personal computers and portable equipment
• Modems and fax machines
• Handheld instruments and PDAs
• Industrial control systems requiring RS-232 communication

Procurement Notes

Verify the suffix EIPWE4 corresponds to the specific tape-and-reel packaging and temperature grade indicated in the official TI datasheet. Confirm RoHS compliance status as manufacturing processes may update component specifications over time. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity and traceability.

Selection Notes

Select this component for applications requiring a single-supply RS-232 transceiver with low standby power. Ensure the system voltage falls within the 3-V to 5.5-V range. Verify that the required data rate does not exceed 120 kbps for optimal performance. Check that the TSSOP-16 package fits the PCB layout constraints.

Part Context

The MAX3221 series is part of Texas Instruments' broader portfolio of RS-232 interface solutions. It succeeds earlier Maxim Integrated designs after the acquisition. The EIPWE4 variant specifically denotes the industrial temperature range and plastic small-outline package. It serves as a drop-in replacement for legacy MAX3221 parts from Maxim.

Replacement Considerations

Direct replacements include MAX3221EIPW and MAX3221EIDR. Verify pin compatibility and electrical characteristics before substitution. Other compatible devices from the same family include MAX3222 and MAX3232, though channel counts differ.