MAX3238ECDWR

Overview

The MAX3238ECDWR is a full-duplex RS-232 transceiver manufactured by Texas Instruments, designed for multichannel communication applications. It integrates five drivers and three receivers within a single integrated circuit. The device operates on a single 3 V to 5.5 V power supply and supports data rates up to 400 kbps. It utilizes a 28-pin SOIC package with a width of 7.50 mm. The component functions within an operating temperature range of 0°C to 70°C. Key electrical specifications include a receiver hysteresis of 300 mV and compliance with RoHS3 standards.

Feature Summary

• Integrates five independent line drivers and three line receivers for comprehensive serial communication support
• Provides robust electrostatic discharge protection rated at +/-15 kV according to human body model standards
• Features a shutdown mode that significantly reduces power consumption during idle periods
• Utilizes internal charge pump circuitry to generate required voltage levels from a single low-voltage supply

Applications

• Industrial control systems requiring reliable serial data transmission
• Portable instrumentation and battery-powered devices due to low power operation
• Modem and communications equipment interfaces
• Point-of-sale terminals and barcode scanners

Procurement Notes

Verify the specific suffix ECDWR to confirm the SOIC-28 package and commercial temperature grade. Confirm RoHS3 compliance status as regulatory requirements evolve. Check current availability as this part number may be subject to discontinuation or lifecycle changes. Ensure the ordering quantity matches the standard reel packaging specifications provided by the manufacturer.

Selection Notes

Select this component when five transmit channels and three receive channels are required in a compact surface-mount footprint. Compare against the SN65C3238 series if higher data rates up to 1 Mbps are necessary. Consider the MAX3238EIPWR variant if an extended industrial temperature range of -40°C to 85°C is required. Verify that the 28-SOIC package dimensions fit the target PCB layout constraints.

Part Context

This device belongs to the MAX3238 family of multichannel RS-232 transceivers. It shares functional similarities with the MAX3243 but differs in the driver-to-receiver ratio configuration. The ECDWR suffix denotes the specific package type and temperature range within the broader product line. It serves as a legacy interface solution for systems transitioning from older RS-232 standards to modern low-voltage logic.

Replacement Considerations

The SN65C3238DBR offers similar functionality with a higher data rate of 1 Mb/s and an extended temperature range. The MAX3238IDB provides an SSOP-28 package option with industrial temperature ratings. Verify pin compatibility and electrical parameters before substituting these alternatives.