MAX3238ECDB

Overview

The MAX3238ECDB is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates on 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 approximately 2 µA. The IC provides ±15-kV electrostatic discharge (ESD) protection on both logic and RS-232 I/O pins per human body model standards. It is housed in a 28-pin TSSOP package and is rated for operation from -40°C to +85°C.

Feature Summary

• Integrated ESD protection exceeding industrial requirements on all signal pins
• Low-power shutdown capability for battery-operated applications
• Single-supply operation eliminating the need for external charge pumps at 5 V

Applications

• Portable equipment requiring robust serial communication interfaces
• Industrial control systems operating in electrically noisy environments
• Modems and handheld terminals utilizing RS-232 protocols

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm temperature range and package variant. Ensure the component matches the required industrial grade specifications for your design environment. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and traceability before procurement.

Selection Notes

Select this component when designing systems requiring multiple RS-232 channels within a compact footprint. It is suitable for applications needing high ESD immunity without external protection circuits. Consider the 28-pin TSSOP package constraints regarding thermal dissipation and board space availability during layout planning.

Part Context

This device belongs to the MAX3238 family of multichannel RS-232 transceivers. It shares functional similarities with other Maxim Integrated and Texas Instruments RS-232 products but offers a specific combination of channel count and low-power features. The ECDB designation indicates the commercial/industrial temperature range and TSSOP packaging configuration.

Replacement Considerations

The TRS3238ECDW is a pin-compatible alternative from Texas Instruments. Verify voltage levels and ESD ratings when substituting. Other MAX3238 variants may differ in temperature range or package type.