MAX232ECDW

Overview

The MAX232ECDW is a dual RS-232 transceiver manufactured by Texas Instruments, designed for EIA/TIA-232-F communication standards. It integrates charge pump circuitry to generate internal positive and negative supply voltages from a single 5V source, eliminating the need for external bipolar power supplies. The device features two drivers and two receivers, supporting data rates up to 120 kbps. It operates within a voltage range of 4.5V to 5.5V and includes ±15-kV electrostatic discharge (ESD) protection on all RS-232 bus lines. Packaged in a 16-pin SOIC format, it functions across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump eliminates requirement for external dual-voltage power supplies
• Robust ±15-kV ESD protection on RS-232 bus pins ensures signal integrity
• Single 5V operation simplifies power design for embedded systems

Applications

• Serial port interfacing between microcontrollers and PC-based equipment
• Industrial control systems requiring reliable RS-232 connectivity
• Embedded devices needing full-duplex asynchronous communication

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and specific package variant against official datasheets. Check for obsolescence notices or lifecycle changes prior to procurement. Ensure storage conditions meet moisture sensitivity level requirements to prevent soldering defects during assembly.

Selection Notes

Select this component when designing circuits requiring dual-channel RS-232 communication with robust ESD protection. It is suitable for applications operating strictly at 5V logic levels. Consider alternative models if lower power consumption or multi-channel support beyond two drivers is required. Verify that the 120 kbps speed meets system timing constraints.

Part Context

This part belongs to the widely adopted MAX232 family of interface ICs. It serves as a standard solution for converting TTL/CMOS logic levels to RS-232 voltages. The device is commonly used in legacy serial communication interfaces and remains prevalent in industrial automation and embedded hardware designs requiring reliable data transmission over short distances.

Replacement Considerations

MAX232IDWR: Pin-compatible alternative with extended temperature range (-40°C to +85°C).

FAQ

Does the MAX232ECDW require external capacitors?

Yes, four external capacitors are required to support the internal charge pump circuitry for generating the necessary positive and negative voltages.

What is the maximum data rate supported?

The device supports data rates up to 120 kbps under specified operating conditions.

Is shutdown functionality available?

No, the MAX232ECDW does not include a shutdown pin; it operates continuously when powered.