MAX222IDWR

Overview

The MAX222IDWR is a dual RS-232 line driver and receiver manufactured by Texas Instruments, designed for full-duplex communication. It operates within a supply voltage range of 4.5 V to 5.5 V, with a typical operating voltage of 5 V. The device supports data rates up to 250 kb/s and features two drivers and two receivers. It is housed in a 16-SOIC package suitable for surface mount installation. The component functions across an extended temperature range from -40°C to +85°C and includes ±15 kV electrostatic discharge (ESD) protection on all lines.

Feature Summary

• Integrated charge pump eliminates the need for external positive and negative voltage supplies
• Provides robust ±15-kV ESD protection on all RS-232 signal lines
• Supports full-duplex data transmission at rates up to 250 kb/s

Applications

• Industrial control systems requiring reliable serial communication
• Point-of-sale terminals and barcode scanners
• Medical equipment with serial interface requirements

Procurement Notes

Verify the specific suffix 'IDWR' corresponds to the industrial temperature grade (-40°C to +85°C) and tape-and-reel packaging format. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor certificates before procurement. Ensure the ordering part number matches the required package type and thermal characteristics for the target application environment.

Selection Notes

Select this component when a dual-channel RS-232 transceiver is needed with integrated charge pumps and high ESD tolerance. Compare against the MAX202 series if lower data rates are acceptable, or consider the MAX3232 for lower power consumption and wider voltage support. Verify that the 16-SOIC footprint fits the PCB layout constraints and that the 250 kb/s speed meets system timing requirements.

Part Context

The MAX222 belongs to the broader family of 5-V powered multichannel RS-232 drivers and receivers from Texas Instruments. This family includes variants like the MAX220 and MAX249, which offer different channel counts and pin configurations. The MAX222 specifically provides a dual-driver/receiver solution in a compact package, serving as a standard interface for legacy serial protocols in modern embedded designs.

Replacement Considerations

The MAX202IDWR is a functional substitute offering similar dual-channel capabilities but with a lower maximum data rate of 120 kb/s. For applications requiring lower quiescent current, the MAX3232IDWR serves as a compatible alternative with extended voltage support.