MAX3222ECPWR

Overview

The MAX3222ECPWR is a dual-channel RS-232 transceiver manufactured by Texas Instruments, designed for full-duplex 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 features two drivers and two receivers housed in a TSSOP-20 surface-mount package. It includes an integrated shutdown mode with a typical operating supply current of 1 mA. The component functions reliably across an extended temperature range from -40°C to +85°C and provides 15 kV electrostatic discharge (ESD) protection on all pins.

Feature Summary

• Integrated charge pump circuitry eliminates the need for external capacitors exceeding standard values, facilitating compact board layouts.
• Includes a dedicated shutdown pin that significantly reduces power consumption during idle periods by lowering supply current.
• Provides robust signal integrity through guaranteed output voltages and high noise immunity suitable for industrial environments.

Applications

• Industrial control systems requiring reliable serial communication over long distances
• Portable battery-powered equipment utilizing low-power RS-232 interfaces
• Modem and fax machine internal communication links

Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature grade (-40°C to +85°C) compared to commercial variants. Confirm the 'PWR' suffix denotes the TSSOP-20 reel packaging format. Ensure compatibility with existing PCB footprints before ordering, as lead frames may vary slightly between manufacturing lots despite identical part numbers.

Selection Notes

Select this component when dual independent channels are required for simultaneous transmit and receive operations. Compare against single-channel alternatives if only one interface is needed to save space. Consider the 500 kb/s speed limit; higher-speed applications may require alternative families. Verify that the 3 V to 5.5 V input range matches the system's power rail availability.

Part Context

This part belongs to the MAX3222 family of RS-232 transceivers. It shares functional similarities with the MAX3222EPE but differs in package type. It serves as a direct replacement for older MAX3222 variants with adjusted temperature ratings. The E-series designation specifically aligns it with automotive and industrial-grade reliability standards.

Replacement Considerations

The MAX3222EPE is a pin-compatible alternative in a different package. The TRS3223ECPWR offers similar functionality but with a narrower commercial temperature range. Verify electrical specifications match exactly before substituting, particularly regarding ESD protection levels and shutdown current characteristics.