MAX3222IDWR

Overview

The MAX3222IDWR is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates within a supply voltage range of 3 V to 5.5 V, supporting both 3.3 V and 5 V logic systems. The device features two drivers and two receivers, enabling full-duplex communication at data rates up to 500 kb/s. It incorporates a shutdown mode that reduces power consumption to approximately 1 µA. The component includes integrated charge pumps requiring only five external 0.1 µF capacitors. It provides 15 kV electrostatic discharge (ESD) protection on all RS-232 lines and is housed in a 20-pin SOIC package.

Feature Summary

• Integrated charge pump eliminates the need for external inductors
• Shutdown pin controls power consumption with microamp-level standby current
• High ESD protection rating ensures robustness against electrostatic discharge events

Applications

• Portable equipment requiring low-power serial communication
• Industrial control systems utilizing RS-232 interfaces
• Modems and fax machines

Procurement Notes

Verify the specific suffix IDWR indicates the tape-and-reel packaging format distinct from tube variants. Confirm the extended temperature grade (-40°C to +85°C) matches application requirements. Cross-reference the manufacturer part number with official datasheets to ensure compatibility with existing circuit designs and footprint specifications.

Selection Notes

Select this variant when reel packaging is required for automated surface-mount assembly processes. Compare against the IDW tube version if manual placement or lower volume prototyping is preferred. Ensure the 500 kb/s speed capability meets system timing constraints. Verify that the 20-pin SOIC footprint aligns with the printed circuit board layout design rules.

Part Context

This component belongs to the MAX3222E family of RS-232 transceivers designed for low-voltage operation. It shares functional similarities with other devices in the series but differs in packaging and specific electrical characteristics. The IDWR designation specifically denotes the industrial temperature range and reel packaging configuration provided by the manufacturer.

Replacement Considerations

MAX3222IDW serves as the equivalent tube-packaged alternative within the same product family. Other compatible transceivers may include the MAX3232 series for single-supply applications or the MAX3221 for reduced pin counts. Verify pinout compatibility and capacitor requirements before substituting.