MAX3222ECDBR

Overview

The MAX3222ECDBR is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates within a supply voltage range of 3 V to 5.5 V, supporting both 3.3 V and 5 V logic systems. The device features two drivers and two receivers for full-duplex communication with a data rate capability of 500 kb/s. It utilizes a TSSOP-20 surface-mount package and includes an integrated shutdown feature. The component functions reliably across an extended industrial temperature range from -40°C to +85°C while consuming only 1 mA of operating current.

Feature Summary

• Integrated dual charge pump circuitry eliminates the need for external positive voltage sources
• Provides ±15 kV electrostatic discharge protection on all RS-232 signal pins per IEC 61000-4-2 standards
• Includes a dedicated shutdown pin to minimize power consumption during idle periods
• Capacitor selection allows for reduced total external capacitance requirements

Applications

• Industrial control systems requiring robust serial communication interfaces
• Portable battery-powered equipment utilizing low-power RS-232 links
• Modems and fax machines needing reliable full-duplex data transmission
• Point-of-sale terminals and medical instrumentation with ESD-sensitive environments

Procurement Notes

Verify the specific suffix against official manufacturer documentation to confirm exact package dimensions and tape-and-reel specifications. Ensure the procurement channel provides valid traceability records for the Texas Instruments brand. Cross-reference the ordering part number with the latest datasheet revision to confirm compliance with current RoHS directives and material declarations before finalizing acquisition orders.

Selection Notes

Select this component when designing circuits that require extended temperature operation compared to commercial grade alternatives. The TSSOP-20 package offers a compact footprint suitable for space-constrained printed circuit board layouts. Engineers should verify that the required data rates do not exceed the specified 500 kb/s limit under maximum load conditions to ensure signal integrity.

Part Context

This device belongs to the MAX3222E family of multichannel RS-232 transceivers designed for low-voltage operations. It serves as a direct replacement for older discrete transistor solutions or legacy interface chips in modern embedded designs. The 'C' designation indicates the commercial temperature variant, while the 'E' suffix typically denotes extended industrial temperature capabilities in Texas Instruments nomenclature.

Replacement Considerations

MAX3222EIDBR is a documented equivalent offering identical electrical characteristics within the same series.