MAX3238IPWR

Overview

The MAX3238IPWR 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 provides full duplex communication with five drivers and three receivers. The device supports data rates up to 1 Mb/s and includes an integrated charge pump for generating the required RS-232 voltage levels. It features +/-15-kV ESD protection on both signal and logic pins, ensuring robust performance in harsh environments. The component is housed in a 28-pin TSSOP package 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 capacitors in some configurations or reduces count significantly compared to older generations.
• High ESD tolerance protects sensitive I/O and logic interfaces against electrostatic discharge events.
• Shutdown mode minimizes power consumption during periods of inactivity.
• Single-supply operation simplifies power design for systems running at 3.3 V or 5 V.

Applications

• Industrial control systems requiring reliable serial communication.
• Portable instrumentation and medical devices needing low power and high noise immunity.
• Communication equipment interfacing with modems or other RS-232 compliant peripherals.
• Embedded systems utilizing microcontrollers with limited I/O voltage margins.

Procurement Notes

Verify the specific suffix 'IPWR' corresponds to the industrial temperature grade and TSSOP-28 packaging 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 circuit design.

Selection Notes

Select this component when designing systems that require multiple RS-232 channels within a compact footprint. Consider the 1-Mb/s data rate capability for applications demanding higher throughput than standard 120-kbps transceivers. Evaluate the power supply constraints to ensure compatibility with the 3-V to 5.5-V operating range. Verify that the thermal performance of the TSSOP package meets the ambient temperature requirements of the enclosure.

Part Context

This device belongs to the MAX3238 family of multichannel RS-232 transceivers. It shares functional similarities with the SN65C3238 series but may differ in specific electrical characteristics or packaging options. The IPWR suffix denotes the industrial temperature range and plastic small-outline package variant. It serves as a modern replacement for legacy multichannel RS-232 solutions offering improved integration and lower standby current.

Replacement Considerations

The SN65C3238DBR is a pin-compatible alternative from Texas Instruments. Verify electrical parameter alignment, particularly regarding ESD protection levels and shutdown current specifications. Check for any differences in recommended external capacitor values or charge pump configuration requirements before substituting.