MAX232EWE+

Overview

The MAX232EWE+ is a dual driver/receiver RS-232 transceiver operating from a single +5V supply. It features two drivers and two receivers with full duplex communication capability. The device operates within a voltage range of 4.5V to 5.5V, consuming 10mA of supply current. It supports data rates up to 200kb/s and provides an ESD protection rating of 15kV. The component functions across an industrial temperature range of -40°C to +85°C and utilizes a 16-pin Wide SOIC package.

Feature Summary

• Integrates internal charge-pump circuitry to generate required ±10V levels from a single +5V source
• Provides robust 15kV electrostatic discharge protection on input and output lines
• Supports full-duplex bidirectional data transmission for standard serial communications

Applications

• Interface translation between TTL/CMOS logic and RS-232 signaling standards
• Implementation of multidrop RS-232 network topologies
• Integration into portable diagnostic equipment requiring serial connectivity

Procurement Notes

Verify the specific suffix 'E' confirms the extended temperature range (-40°C to +85°C) and the 'WE+' indicates the surface-mount wide SOIC package. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure external capacitors match datasheet recommendations for stable charge pump operation.

Selection Notes

Select this component when a single +5V power rail is available and bipolar supplies are not feasible. The integrated charge pump eliminates the need for external voltage inverters. Verify that the 200kb/s data rate meets system requirements and that the 16-pin Wide SOIC footprint fits the PCB layout constraints.

Part Context

This part belongs to the MAX220–MAX249 family of line drivers and receivers designed for EIA/TIA-232E and V.28/V.24 interfaces. The MAX232 variant specifically provides two channels of transmission and reception. The family is characterized by its ability to operate without external bipolar power supplies, simplifying system design for embedded applications.

Replacement Considerations

Public confirmed substitute part numbers: MAX232EEWE+, MAX232CWE+

FAQ

Does the MAX232EWE+ require external components for voltage generation?

Yes, it requires four external capacitors (typically 1µF) connected to the charge pump pins to generate the necessary ±10V voltages for RS-232 signal levels.

What is the maximum data rate supported by this transceiver?

The datasheet specifies a typical data rate of 200kb/s under normal operating conditions.

How does the device handle electrostatic discharge events?

The device includes built-in protection circuitry rated for 15kV electrostatic discharge (ESD) on both the transmitter and receiver inputs.