MAX3221EIDB

Overview

The MAX3221EIDB is a single-channel RS-232 transceiver manufactured by Texas Instruments, designed for operation with supply voltages ranging from 3 V to 5.5 V. It integrates one driver and one receiver, supporting full-duplex communication at data rates up to 1 Mb/s. The device features ±15-kV electrostatic discharge (ESD) protection on all RS-232 lines, ensuring robustness in harsh environments. It operates within an industrial temperature range of -40°C to +85°C and consumes a typical supply current of 1 mA. The component is housed in a 16-pin SSOP package, suitable for surface-mount applications requiring compact interface solutions.

Feature Summary

• Integrates a single RS-232 driver and receiver for full-duplex communication
• Provides ±15-kV ESD protection on transmit and receive lines
• Supports data transmission rates up to 1 megabit per second
• Operates efficiently with low supply current consumption

Applications

• Industrial control systems requiring reliable serial communication
• Portable battery-powered devices utilizing RS-232 interfaces
• Modem and communications equipment interfacing
• Point-of-sale terminals and handheld data collection units

Procurement Notes

Verify the exact suffix against the manufacturer's latest documentation to confirm pinout compatibility and electrical specifications. Ensure the ordering part number matches the required package type and temperature grade. Cross-reference with official distributor catalogs to validate authenticity and traceability before procurement.

Selection Notes

Select this component when a single-channel RS-232 interface is sufficient for the design requirements. Consider the 16-pin SSOP package constraints for PCB layout. Verify that the operating voltage range aligns with the system power supply. Evaluate ESD protection needs against the specific environmental conditions of the end application.

Part Context

This device belongs to the MAX3221 family of true 3-V to 5.5-V RS-232 transceivers. It shares functional similarities with other single-channel variants but differs in packaging and specific thermal ratings. The family is characterized by low power consumption and integrated charge pumps, eliminating the need for external capacitors in some configurations.

Replacement Considerations

The TRSF3221EIDBR is a documented parameter-equivalent replacement offered by Texas Instruments. Verify pin-to-pin compatibility and electrical characteristics before substitution. Other single-channel RS-232 transceivers may require schematic adjustments due to differing pinouts or capacitor requirements.