MAX3238IPWQ1

Overview

The MAX3238IPWQ1 is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments, designed for automotive applications under the AEC-Q100 qualification standard. It operates on a single 3-V to 5.5-V power supply and features five drivers and three receivers. The device supports full-duplex communication with a data rate of up to 250 kb/s and includes a shutdown mode that reduces operating current to approximately 2 µA. It provides ±15-kV electrostatic discharge (ESD) protection per human body model standards. The component is housed in a 28-pin TSSOP package and functions within an ambient temperature range of -40°C to +85°C.

Feature Summary

• Integrated ESD protection rated at ±15 kV (HBM) for enhanced signal integrity in harsh environments
• Automotive-grade reliability certified under AEC-Q100 standards for extended operational durability
• Low-power shutdown capability significantly reduces standby current consumption

Applications

• Automotive telematics systems requiring robust serial communication interfaces
• In-vehicle infotainment networks utilizing RS-232 protocols
• Industrial control modules operating in high-noise automotive environments

Procurement Notes

Verify the specific suffix Q1 indicates AEC-Q100 automotive qualification when sourcing. Confirm the package type matches the required PCB footprint, typically TSSOP-28 for this variant. Ensure the supplier provides traceability documentation consistent with automotive quality management standards. Check for RoHS compliance status as specified in the official datasheet. Validate the operating temperature range requirements against the -40°C to +85°C specification before finalizing procurement.

Selection Notes

Select this component when designing for automotive environments necessitating high ESD immunity and standardized serial communication. The 250 kb/s data rate suits moderate-speed telemetry rather than high-bandwidth applications. Consider the 28-pin TSSOP package constraints for board space limitations. Verify that the 3-V to 5.5-V supply range aligns with the vehicle's power distribution network. Evaluate the need for five drivers and three receivers to determine if fewer channels would allow for cost reduction.

Part Context

This part belongs to the MAX3238 family of multichannel RS-232 transceivers from Texas Instruments. The IPWQ1 designation specifically denotes the automotive-qualified version with a TSSOP-28 package. It shares functional similarities with other MAX32xx series devices but is distinct due to its AEC-Q100 certification and specific pinout configuration optimized for automotive integration.

Replacement Considerations

Direct replacements include other AEC-Q100 qualified RS-232 transceivers from Texas Instruments such as the MAX3221EIPW or MAX3232EIPW, provided they meet the channel count and voltage requirements. Cross-reference pinouts carefully as channel configurations may vary between family members.