MAX3238IDBR

Overview

The MAX3238IDBR 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 five drivers and three receivers for full-duplex communication. The device supports data rates up to 250 kbps with a propagation delay of 150 ns. It includes a shutdown mode that reduces supply current to less than 1 µA. The component provides ±15-kV electrostatic discharge (ESD) protection on both the RS-232 I/O pins and logic inputs/outputs. It is housed in a 28-pin TSSOP package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated ESD protection rated at ±15 kV for human body model on all signal pins
• Shutdown capability significantly lowers power consumption for battery-operated systems
• Single-supply operation compatible with standard 3.3-V and 5-V logic levels
• Multichannel architecture supporting multiple serial ports in a compact footprint

Applications

• Industrial control systems requiring robust serial communication interfaces
• Portable instrumentation utilizing battery power with low standby current requirements
• Data acquisition modules connecting microcontrollers to RS-232 peripherals
• Embedded systems needing multiple serial channels in space-constrained designs

Procurement Notes

Verify the specific suffix IDBR corresponds to the TSSOP-28 package and industrial temperature grade when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor certificates. Ensure the ordering part number matches the exact pinout and electrical specifications required for the target application design.

Selection Notes

Select this component when designing circuits requiring five transmit and three receive channels on a single IC. It is suitable for applications where board space is limited but multiple RS-232 connections are necessary. Consider the 250 kbps speed limit and ensure it meets the baud rate requirements of the connected devices. Evaluate the need for shutdown functionality if power management is critical for the system.

Part Context

This device belongs to the MAX3238 family of multichannel RS-232 transceivers. It shares core functionality with variants like the MAX3238EIPWR and MAX3238EEAI+, differing primarily in packaging, temperature rating, and manufacturing origin. The IDBR suffix indicates a specific tape-and-reel or tube configuration depending on the manufacturer's current production standards for the TSSOP-28 form factor.

Replacement Considerations

Direct substitutes include the MAX3238EIPWR and MAX3238EEAI+. Verify that alternative packages match the PCB footprint and that thermal ratings align with the operating environment. Cross-reference datasheets to confirm identical pin assignments and electrical characteristics before implementation.