MAX3221ECDBRG4

Overview

The MAX3221ECDBRG4 is a single-channel 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 an integrated charge pump that generates internal voltages for RS-232 signal transmission without requiring external transformers. Key electrical parameters include a data rate of 120 kbps, a shutdown current of 1 µA, and ±15-kV ESD protection on all pins. It is housed in a small-outline package (DB) with 16 pins.

Feature Summary

• Integrates a charge pump to generate required RS-232 voltage levels from a single low-voltage supply
• Provides robust ±15-kV electrostatic discharge (ESD) protection on all RS-232 signal lines
• Features an AutoShutdown function that reduces power consumption during idle periods
• Supports true 3-V to 5.5-V operation compatible with various logic families

Applications

• Portable equipment requiring low-power serial communication
• Battery-operated handheld devices and PDAs
• Industrial control systems with RS-232 interfaces
• Modems and fax machines

Procurement Notes

Verify the complete part number including the G4 suffix to confirm lead-free and RoHS compliance status as per Texas Instruments specifications. Ensure the ordering suffix matches the required tape-and-reel packaging configuration. Cross-reference the manufacturer's latest datasheet revision to confirm pinout and electrical characteristics remain unchanged before finalizing procurement orders.

Selection Notes

Select this component when a single-channel RS-232 transceiver with ultra-low shutdown current is required. It is suitable for designs needing ±15-kV ESD protection directly on the interface pins. Compare against multi-channel alternatives like the MAX3243 if additional ports are needed. Verify that the 120 kbps data rate meets the application's speed requirements.

Part Context

This device belongs to the MAX3221 family of single-channel RS-232 transceivers. It is part of Texas Instruments' broader portfolio of interface ICs designed for low-voltage applications. The G4 suffix indicates a specific manufacturing lot compliant with environmental standards. It serves as a direct replacement for older Maxim Integrated versions of the same functional design.

Replacement Considerations

Direct equivalents include the MAX3221EIDBRE4 and MAX3221ECDBR. For pin-compatible upgrades, consider the SN75C3222 or SN75C3223 series. Verify that substitute parts maintain the same 16-pin SOIC package and voltage range.