MAX3221EIDBRG4

Overview

The MAX3221EIDBRG4 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 supply and includes internal charge pumps requiring only five external 0.1-µF capacitors. The device features ±15-kV ESD protection on RS-232 transceiver pins, ensuring robust performance in harsh environments. It supports data rates up to 250 kbps and offers low supply current of 1 µA in shutdown mode. Packaged in a 16-pin SSOP with an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump eliminates need for dual voltage supplies
• High electrostatic discharge tolerance protects sensitive circuitry
• Low power consumption with automatic shutdown capability

Applications

• Portable equipment requiring RS-232 communication
• Modems and fax machines
• Handheld terminals and PDAs
• Industrial control systems with serial interfaces

Procurement Notes

Verify the complete part number including suffixes such as 'E' for lead-free/RoHS compliance and 'G4' for green packaging when sourcing. Confirm the package type matches design requirements, typically SSOP-16 for this variant. Check manufacturer documentation for any recent product change notices or lifecycle status updates before finalizing procurement plans.

Selection Notes

Select this component for applications requiring single-supply operation with minimal external components. Ensure the required data rate does not exceed 250 kbps. Verify that the 16-pin SSOP footprint fits the PCB layout constraints. Consider thermal dissipation capabilities within the specified industrial temperature range during system design.

Part Context

This part belongs to the MAX3221 family of RS-232 transceivers designed for low-power portable applications. It serves as a direct replacement for older dual-supply RS-232 drivers, simplifying board design by integrating charge pumps. The device maintains compatibility with standard RS-232 signal levels while reducing overall system complexity and component count.

Replacement Considerations

Direct pin-compatible alternatives include the MAX3221IDBR and TRSF3221EIDBR. Verify electrical specifications match exactly, particularly ESD protection levels and data rate limits. Check package dimensions and thermal characteristics to ensure mechanical interchangeability without redesigning the PCB layout.