MAX3238EIDWR

Overview

The MAX3238EIDWR is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates from a single 3-V to 5.5-V power supply and features integrated charge pumps for generating the required RS-232 voltage levels. The device includes five drivers and three receivers, supporting full-duplex communication with data rates up to 1 Mb/s. It provides ±15-kV electrostatic discharge (ESD) protection on all RS-232 lines according to Human Body Model standards. The component is housed in a 28-pin Thin Shrink Small Outline Package (TSSOP) and is rated for operation over an extended temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump eliminates the need for external positive and negative voltage supplies.
• High ESD tolerance protects sensitive interfaces against static discharge events.
• Shutdown mode significantly reduces power consumption during idle periods.
• Small form factor package facilitates dense circuit board layouts.

Applications

• Industrial control systems requiring robust serial communication
• Point-of-sale terminals and payment devices
• Medical equipment with strict interface reliability needs

Procurement Notes

Verify the specific suffix 'EIDWR' to confirm the industrial temperature grade, TSSOP-28 package, and tape-and-reel packaging format. Ensure compatibility with existing PCB footprints and reflow soldering profiles specified for this package type. Cross-reference the manufacturer's latest datasheet for any recent pinout or electrical specification updates before finalizing procurement orders.

Selection Notes

Select this component when multiple RS-232 channels are required within a compact footprint. It is suitable for designs operating between 3 V and 5.5 V where space constraints preclude larger packages. Consider the 1 Mb/s data rate limit and the specific driver/receiver count when evaluating alternative transceivers for similar interface requirements.

Part Context

This part belongs to the MAX3238 family of multichannel RS-232 transceivers. It shares functional similarities with other members like the MAX3238EIPWR but differs in package style and manufacturing lot specifics. The series is designed to replace legacy discrete solutions and older transceiver chips in modern embedded applications.

Replacement Considerations

The SN65C3238DBR is a documented parameter-equivalent substitute from Texas Instruments. Verify pin-to-pin compatibility and electrical specifications against the current design requirements before substitution.