MAX232ECDWR

Overview

The MAX232ECDWR is a dual RS-232 transceiver manufactured by Texas Instruments, designed for EIA/TIA-232-F communication standards. It integrates two drivers and two receivers within a single SOIC-16 package. The device operates on a single 4.5V to 5.5V supply voltage and achieves data rates up to 120 kbps. Key electrical specifications include a typical propagation delay of 0.5 microseconds and an operating supply current of 10 mA. It supports full-duplex transmission and functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates charge pump circuitry to generate positive and negative voltages from a single 5V supply, eliminating the need for external dual-voltage sources.
• Provides robust ESD protection rated at 15 kV according to the Human Body Model (HBM), enhancing reliability in sensitive environments.
• Features internal driver enable functionality that reduces power consumption during idle periods by shutting down the output stages.

Applications

• Industrial control systems requiring reliable serial communication interfaces.
• Point-of-sale (POS) terminals and barcode scanners utilizing RS-232 protocols.
• Medical equipment and instrumentation needing isolated serial data links.
• Embedded computer systems connecting to modems or peripheral devices.

Procurement Notes

Verify the specific suffix 'E' indicates extended industrial temperature range capabilities compared to standard commercial variants. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure ordering quantities align with tape-and-reel packaging requirements for automated assembly processes.

Selection Notes

Select this component when designing PCBs with limited space due to its compact SOIC-16 surface-mount footprint. Choose this part over through-hole alternatives if automated pick-and-place manufacturing is required. Consider the 120 kbps speed limit when evaluating compatibility with high-speed legacy serial peripherals.

Part Context

This component belongs to the widely adopted MAX232 family of interface ICs, originally developed by Maxim Integrated and now produced by Texas Instruments. It serves as a standard solution for level-shifting between TTL/CMOS logic levels and RS-232 voltage swings. The 'ECDWR' suffix denotes the extended temperature grade, SOIC package, and reel packaging format.

Replacement Considerations

The TRS232EIDWR is a pin-compatible replacement offering similar functionality. Other potential substitutes include the ADM232 series from Analog Devices, though external capacitor values may differ. Verify pinout compatibility before substituting to ensure direct board-level interchangeability.