MAX3222CDWRE4

Overview

The MAX3222CDWRE4 is a dual channel RS-232 transceiver manufactured by Texas Instruments. It operates from a single 3 V to 5.5 V supply and features a shutdown mode that reduces power consumption to less than 1 µA. The device integrates charge pumps requiring only four external 0.1 µF capacitors for operation. It supports data rates up to 1 Mb/s and provides full duplex communication with two drivers and two receivers. The component is housed in a 20-pin SOIC package and is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump eliminates the need for external voltage sources
• Shutdown mode significantly reduces quiescent current for battery applications
• Full duplex operation with independent driver and receiver controls

Applications

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

Procurement Notes

Verify the suffix RE4 indicates tape and reel packaging when sourcing. Confirm the CD designation corresponds to the commercial temperature grade (-40°C to +85°C). Ensure the SOIC-20 package matches the target PCB footprint. Cross-reference the manufacturer part number against official Texas Instruments documentation to confirm authenticity and revision status before procurement.

Selection Notes

Select this component for designs requiring dual RS-232 channels with minimal external capacitance. Compare against the MAX3222E series if extended industrial temperature ranges are required. Verify that the 1 Mb/s data rate meets system timing requirements. Ensure the 3 V to 5.5 V supply range aligns with the available board voltage rails.

Part Context

This part belongs to the MAX3222 family of multichannel RS-232 line drivers and receivers. It shares functional similarities with the MAX3222IDW and MAX3222ECPWR but differs in package type and temperature rating. The RE4 suffix specifically denotes reel packaging, distinguishing it from tube-packaged variants like the IDW.

Replacement Considerations

The MAX3222IDW serves as a pin-compatible alternative with identical electrical characteristics but may differ in packaging format. The MAX3222ECPWR offers similar functionality in a TSSOP-20 package. Verify thermal performance and pinout compatibility before substituting.