MAX3221MDBREP

Overview

The MAX3221MDBREP is a single-channel RS-232 line driver and receiver manufactured by Texas Instruments. It operates from a single 3-V to 5.5-V power supply and supports data rates up to 250 kbps. The device integrates charge pumps to generate the required ±10-V signals for EIA/TIA-232-F compliance without external inductors. It features ±15-kV electrostatic discharge (ESD) protection on all lines, ensuring robust operation in harsh environments. The component is housed in a 16-pin SSOP package with a width of 5.30 mm. It functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates internal charge pumps to eliminate the need for external inductors or transformers.
• Provides ±15-kV ESD protection on both transmitter inputs and receiver outputs.
• Operates reliably with a single low-voltage power supply ranging from 3 V to 5.5 V.
• Ensures signal integrity through Schmitt-trigger receiver inputs that filter noise.

Applications

• Industrial control systems requiring reliable serial communication.
• Portable battery-powered equipment utilizing low-voltage logic interfaces.
• Modems and fax machines adhering to standard RS-232 protocols.
• Point-of-sale terminals and medical instrumentation.

Procurement Notes

Verify the specific suffix MDBREP corresponds to the SSOP-16 package variant when sourcing. Confirm RoHS compliance status matches current manufacturing standards. Check for any recent Product Change Notifications regarding assembly sites or marking changes. Ensure the supplier provides original manufacturer documentation to validate authenticity.

Selection Notes

Select this component when a single full-duplex RS-232 channel is sufficient for the design. It is suitable for applications prioritizing board space savings due to the integrated charge pump. Consider the SSOP-16 footprint constraints during PCB layout. Verify that the operating voltage range aligns with the system's power supply architecture.

Part Context

This part belongs to the MAX3221 family of true 3-V to 5.5-V RS-232 transceivers. The family includes variants with different pin counts and channel configurations, such as the dual-channel MAX3222. The MAX3221MDBREP specifically denotes the single-channel version in a surface-mount SSOP package, offering a compact solution for legacy serial interface integration.

Replacement Considerations

The MAX3221IDBR is a verified equivalent part number within the same product family. Both components share identical electrical specifications and functionality. Designers may substitute one for the other if package compatibility allows. Always verify the specific suffix requirements for packaging and temperature grades before replacement.