MAX3221IDBRG4

Overview

The MAX3221IDBRG4 is a low-power RS-232 transceiver manufactured by Texas Instruments, designed for single-supply operation. It integrates two drivers and two receivers within an SSOP-20 package. The device operates from a power supply voltage range of 3 V to 5.5 V, supporting both 3.3 V and 5 V systems. It achieves data rates up to 250 kb/s with a typical operating supply current of 1 mA. The component functions across an extended industrial temperature range from -40°C to +85°C and includes built-in ESD protection capabilities.

Feature Summary

• Integrates dual drivers and dual receivers for complete RS-232 communication functionality
• Operates on a single 3 V to 5.5 V power supply without requiring external charge pumps
• Provides low-power consumption suitable for battery-operated applications
• Includes electrostatic discharge (ESD) protection for signal lines

Applications

• Industrial control systems requiring serial communication
• Portable equipment utilizing battery power sources
• Modem and peripheral interface connections
• Point-of-sale terminals and data acquisition devices

Procurement Notes

Verify the specific suffix G4 indicates lead-free compliance and RoHS status before procurement. Confirm the SSOP-20 package dimensions match the target PCB footprint. Check for obsolescence notices or lifecycle changes as this part may have limited availability compared to newer revisions. Ensure the supplier provides valid traceability documentation for quality assurance purposes.

Selection Notes

Select this component when dual-channel RS-232 connectivity is required in a compact surface-mount form factor. Compare against the MAX3223 if four channels are needed, or the MAX3221IDBR if the standard non-green variant is acceptable. Consider the TRS3221E series for potential pin-compatible upgrades with improved performance characteristics. Verify that the 250 kb/s speed meets the system timing requirements.

Part Context

This part belongs to the MAX3221 family of low-power RS-232 transceivers. The 'G4' suffix typically denotes a lead-free and RoHS-compliant version of the standard MAX3221IDBR. It shares functional similarities with other members of the MAX32xx series but is distinct in its channel count and package configuration. The ID designation indicates the industrial temperature range specification.

Replacement Considerations

• MAX3221IDBR
• MAX3221IPWR
• TRS3221EIDBR