MAX3222CDW

Overview

The MAX3222CDW 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 ESD protection on all pins and draws a typical supply current of 1 mA. The component is housed in a 24-pin SOIC package.

Feature Summary

• Integrates dual independent drivers and receivers for simultaneous bidirectional communication
• Provides robust electrostatic discharge protection rated at 15 kV across all signal pins
• Operates efficiently with low supply current consumption suitable for power-sensitive designs
• Supports standard RS-232 voltage levels using external charge pump capacitors

Applications

• Industrial control systems requiring reliable serial communication
• Portable instrumentation and medical devices utilizing battery power
• Modem and communications equipment interfaces
• Point-of-sale terminals and barcode scanners

Procurement Notes

Verify the specific suffix against the manufacturer's official documentation to confirm pinout compatibility and thermal performance. Ensure the ordering information matches the required package variant and temperature grade. Cross-reference the datasheet revision history to validate parameter consistency before integration into production designs.

Selection Notes

Select this component when dual independent channels are required for separate transmit and receive paths. Compare against single-channel alternatives if only one interface is needed to optimize board space. Verify that the 500 kb/s speed meets system requirements and that the 3 V to 5.5 V supply range aligns with available power rails.

Part Context

This part belongs to the MAX3222 family of RS-232 transceivers, which are widely used for serial communication interfaces. The CDW suffix indicates a specific plastic small-outline package configuration. This series is known for replacing older discrete transistor solutions with integrated charge pumps.

Replacement Considerations

Direct replacements include the SN3222CDW from Texas Instruments, which offers compatible functionality. Other equivalents may include the MAX3222IDW for extended industrial temperature ranges. Verify pin-to-pin compatibility and electrical parameters before substitution.