MAX3222ECDW

Overview

The MAX3222ECDW is a dual-channel RS-232 transceiver manufactured by Texas Instruments, designed for full-duplex data communication. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 500 kb/s. The device integrates two drivers and two receivers in a single package. Key electrical specifications include a maximum operating temperature of +85°C and a minimum of -40°C. It features an active current consumption of 1 mA and includes a shutdown mode for power conservation. The unit provides 15 kV ESD protection on all pins and is housed in a 20-pin SOIC package.

Feature Summary

• Integrated charge pump circuitry eliminates the need for external capacitors in some configurations, though typically four are required for optimal performance.
• Provides robust electrostatic discharge (ESD) protection rated at 15 kV according to the Human Body Model.
• Includes a dedicated shutdown pin to minimize power consumption during idle periods.
• Compatible with standard RS-232 signal levels for interfacing with DTE and DCE equipment.

Applications

• Industrial control systems requiring reliable serial communication over moderate distances.
• Portable instrumentation and battery-powered devices utilizing 3V or 5V logic supplies.
• Modem interfaces and point-of-sale terminals adhering to TIA/EIA-232-F standards.

Procurement Notes

Verify the specific suffix 'E' indicates the extended industrial temperature range (-40°C to +85°C). Confirm the 'DW' suffix corresponds to the 20-lead SOIC package width. Check for RoHS compliance status as manufacturing processes evolve. Ensure the source document matches the exact part number to avoid confusion with similar variants like the MAX3222IDW or MAX3222CPWR which may differ in temperature grade or package type.

Selection Notes

Select this component when a dual-channel RS-232 interface is needed with industrial temperature tolerance. Compare against the MAX3222IDW if a wider commercial temperature range suffices, or the MAX3222ECPWR if a TSSOP package is preferred for space constraints. Verify that the 500 kb/s data rate meets system requirements. Ensure the design accommodates the required external capacitors for the internal charge pumps.

Part Context

This device belongs to the MAX3222E family of multichannel RS-232 line drivers and receivers from Texas Instruments. It shares functional similarities with the MAX3232 but offers higher data rates. The E-series designation specifically denotes components qualified for operation across the extended industrial temperature spectrum, distinguishing them from commercial-grade counterparts.

Replacement Considerations

The MAX3222IDW serves as a direct pin-compatible alternative with a commercial temperature range. The MAX3222ECPWR offers the same electrical performance in a TSSOP-20 package. Cross-reference datasheets to confirm capacitor requirements and pinout compatibility before substitution.