MAX3221IDBG4

Overview

The MAX3221IDBG4 is a low-power RS-232 transceiver manufactured by Texas Instruments, designed for single-supply operation between 3 V and 5.5 V. It integrates two drivers and two receivers within an SSOP-20 package, supporting data rates up to 250 kb/s. The device operates with a typical supply current of 1 mA and functions reliably across an industrial temperature range from -40°C to +85°C. It includes integrated charge pumps requiring only external 0.1 µF capacitors and provides ESD protection rated at ±15 kV according to the Human Body Model.

Feature Summary

• Integrates dual drivers and dual receivers for full-duplex communication on a single chip.
• Operates efficiently on a single power supply ranging from 3 V to 5.5 V.
• Includes built-in charge pump circuitry to generate required voltage levels without external inductors.

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 line driver and receiver functionality.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix 'G4' indicates lead-free compliance and RoHS status as per Texas Instruments documentation. Ensure the SSOP-20 package matches your PCB footprint requirements before finalizing procurement decisions.

Selection Notes

Select this component when designing circuits that require dual-channel RS-232 connectivity with minimal power consumption. It is suitable for applications where space constraints favor the SSOP-20 package over larger alternatives. Verify that the 250 kb/s data rate meets your system's timing requirements and that the operating voltage aligns with your available power rails.

Part Context

This part belongs to the MAX3221 family of RS-232 transceivers. The 'I' designation specifies the industrial temperature range, while 'D' indicates the SSOP package type. The 'G4' suffix typically denotes environmental compliance features such as lead-free construction. This variant serves as a specialized interface solution within Texas Instruments' broader portfolio of serial communication devices.

Replacement Considerations

The MAX3221IDR is a pin-compatible alternative available in a different package configuration. Other family members like the MAX3222 offer similar electrical characteristics but may vary in package options or specific feature sets. Always consult official datasheets to confirm functional equivalence before substitution.