MAX3222IPW

Overview

The MAX3222IPW is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates from a single 3-V to 5.5-V supply and includes two drivers and two receivers for full-duplex communication. The device supports data rates up to 500 kb/s and features low supply current of 1 mA in shutdown mode. It utilizes small external charge pumps requiring only four 0.1-F capacitors. The component provides ±15-kV ESD protection on RS-232 lines and meets TIA/EIA-232-F standards. It is housed in a 20-pin TSSOP package with an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump circuitry minimizes external component count by requiring only four small capacitors.
• Provides robust electrostatic discharge protection rated at ±15 kV on all RS-232 signal lines.
• Supports flexible power management through a dedicated shutdown pin that reduces supply current significantly.

Applications

• Industrial control systems requiring reliable serial communication interfaces
• Portable instrumentation and battery-powered devices utilizing low-power operation
• Modem and fax machine implementations adhering to standard RS-232 protocols

Procurement Notes

Verify the specific suffix IPW confirms the 20-pin TSSOP package and industrial temperature grade during sourcing. Confirm RoHS compliance status as manufacturing processes evolve. Ensure the supplier provides valid traceability documentation for critical applications. Cross-reference the manufacturer part number against official distributor catalogs to avoid counterfeit components. Validate that the delivered units match the specified electrical characteristics and packaging format.

Selection Notes

Select this component when designing circuits requiring dual-channel RS-232 connectivity within space-constrained environments. The TSSOP-20 package offers a compact footprint suitable for surface-mount assembly. Consider the 1-mA shutdown current for battery-operated applications where power efficiency is paramount. Verify that the 500-kb/s data rate aligns with system timing requirements. Ensure the 3-V to 5.5-V supply range matches the available power rails in the target design.

Part Context

This device belongs to the MAX3222 family of multichannel RS-232 transceivers designed for low-voltage operations. It serves as a direct replacement for older 5-V-only RS-232 drivers, enabling compatibility with modern 3-V logic systems. The IPW suffix specifically denotes the plastic thin-shrink small-outline package variant. This series is widely used in embedded systems requiring robust serial data transmission over short distances.

Replacement Considerations

The SN75C3222 is a compatible alternative offering similar functionality within the same voltage range. Both devices support dual drivers and receivers with comparable data rate capabilities. Verify pinout compatibility before substitution to ensure seamless integration into existing PCB layouts. Check if the alternative component meets the same ESD protection specifications required by the application.