MAX3221ECPWE4

Overview

The MAX3221ECPWE4 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 power supply and includes internal charge pumps to generate the required voltages for RS-232 communication without external inductors. The device supports data rates up to 250 kbps and features ±15-kV electrostatic discharge (ESD) protection on all RS-232 lines. It is available in a 16-pin TSSOP package with an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump eliminates need for external inductors
• High ESD protection rating on RS-232 I/O pins
• Low supply current with AutoShutdown feature
• Compatible with standard RS-232 voltage levels

Applications

• Point-to-point serial communications
• Modems and fax machines
• Portable instruments and PDAs
• Industrial control systems

Procurement Notes

Verify the specific suffix 'E' indicates extended temperature range and 'PWE' denotes the TSSOP-16 package variant. Confirm RoHS compliance status as indicated by the 'E4' suffix. Check current part status for availability, as older revisions may be discontinued or subject to last-time buy notices. Ensure the supplier provides genuine Texas Instruments components with traceable lot codes.

Selection Notes

Select this component when a single full-duplex RS-232 transceiver is required with robust ESD protection. It is suitable for applications needing low power consumption and operation from a single 3-V to 5.5-V supply. Consider the TSSOP-16 package for space-constrained designs. Verify that the 250 kbps data rate meets system requirements and that the industrial temperature range fits the operating environment.

Part Context

The MAX3221 series is part of Texas Instruments' portfolio of low-power RS-232 transceivers. The MAX3221ECPWE4 specifically refers to the industrial grade version in a TSSOP package. This family is designed for portable applications where battery life is critical. The 'E' suffix typically denotes extended temperature performance compared to commercial grades.

Replacement Considerations

Direct replacements include the MAX3221ECPW and MAX3221IPWR. Verify pinout compatibility and electrical specifications before substitution. The MAX3221CDBE4 is another variant in the same family but may differ in package type. Always consult the latest datasheets to ensure functional equivalence.