MAX3222ECDWR

Overview

The MAX3222ECDWR 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 ±15 kV electrostatic discharge (ESD) protection on the RS-232 lines and consumes approximately 1 mA of supply current. The component is housed in a 20-pin SOIC package.

Feature Summary

• Integrated ESD protection rated at ±15 kV for robust signal line integrity
• Low power consumption with active current draw of 1 mA
• Supports standard RS-232 voltage levels without external charge pumps

Applications

• Industrial control systems requiring reliable serial communication
• Portable instrumentation and battery-powered devices
• Modem and fax machine interface circuits

Procurement Notes

Verify the specific suffix 'E' indicates extended industrial temperature range capabilities. Confirm the 'CDW' package designation matches the required surface-mount footprint. Ensure the revision level aligns with existing design documentation to prevent pinout discrepancies during integration.

Selection Notes

Select this component when dual independent channels are necessary for simultaneous transmit and receive operations. Compare against single-channel alternatives if only one port is required to optimize board space. Consider the 500 kb/s speed limit against higher-speed requirements that might necessitate alternative families.

Part Context

This part belongs to the MAX3222 family of multichannel RS-232 line drivers and receivers. It shares functional similarities with other TI parts like the MAX3222IDW but differs in packaging and temperature rating. The series is widely used in legacy and modern embedded systems for serial connectivity.

Replacement Considerations

The SN75C3222DWR is a compatible alternative offering similar functionality. Verify pin compatibility and electrical characteristics before substitution. Other variants within the MAX3222 series may serve as direct replacements depending on package constraints.