MAX3221CDB

Overview

The MAX3221CDB is a single-channel RS-232 line transceiver manufactured by Texas Instruments. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 250 kbps. The device integrates charge pumps to generate the required voltages for EIA/TIA-232-F, RS-232, and V.28 standards without external inductors. It features one driver and one receiver with single-ended signal types and 3-state driving mode. The component is housed in a 16-pin SSOP package and is compliant with EU hazardous substance restrictions.

Feature Summary

• Integrates internal charge pumps to eliminate the need for external inductors
• Supports full-duplex communication over point-to-point topologies
• Provides ESD protection rated at 15 kV on all pins

Applications

• Industrial control systems requiring serial communication
• Portable battery-powered equipment utilizing low-voltage operation
• Modems and fax machines adhering to standard RS-232 protocols

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm package type and temperature grade. Confirm RoHS compliance status and lead-free characteristics directly from the manufacturer's current datasheet or authorized distributor declarations before procurement.

Selection Notes

Select this component when a single transmitter and receiver are sufficient for the application. Ensure the operating environment stays within the specified 0°C to +70°C temperature range. Verify that the 250 kbps data rate meets the system requirements and that the SSOP-16 footprint fits the PCB layout constraints.

Part Context

This part belongs to the MAX3221 family of single-channel RS-232 transceivers. It shares functional similarities with other devices in the series but differs in package configuration and specific electrical tolerances. The CDB designation indicates a commercial temperature range and SSOP packaging variant within the broader product line.

Replacement Considerations

The MAX3221CDBE4 is a documented equivalent variant offering the same functionality in a tube package. Verify pin compatibility and electrical specifications against the target design requirements before substitution.