MAX3227CDB

Overview

The MAX3227CDB is a dual-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 and supports data rates up to 1 Mbit/s. The device integrates two drivers and two receivers in full-duplex configuration, housed in a 16-pin SSOP package. It features ±15-kV IEC ESD protection on all RS-232 lines and includes an AutoShutdown Plus feature that reduces supply current to 1 μA when no valid signal is present. The component functions across a commercial temperature range of 0°C to +70°C.

Feature Summary

• Dual-channel RS-232 transceiver with integrated charge pump
• AutoShutdown Plus functionality for ultra-low power consumption
• Robust ±15-kV IEC ESD protection on transmit and receive lines

Applications

• Portable equipment requiring low-power serial communication
• Industrial control systems with exposed serial ports
• Battery-operated devices utilizing RS-232 interfaces

Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm pinout compatibility and electrical characteristics. Ensure the ordering code matches the required package type and temperature grade. Cross-reference the component revision history for any documented changes that may affect performance or physical dimensions before finalizing procurement.

Selection Notes

Select this component for applications requiring dual RS-232 channels with minimal standby power. Compare the 1-Mbit/s speed against higher-speed alternatives if bandwidth requirements exceed specifications. Evaluate the SSOP package constraints regarding thermal dissipation and board space availability relative to other available packages in the series.

Part Context

This part belongs to the MAX3227 family of single and dual RS-232 transceivers designed for low-voltage operation. It serves as a bridge between microprocessors and RS-232 peripherals, offering enhanced ESD resilience compared to standard interface ICs. The CDB variant specifically denotes the commercial temperature range and SSOP packaging format.

Replacement Considerations

The TRS3227EIDB is a verified equivalent from Texas Instruments. Verify pin-to-pin compatibility and ensure the replacement meets the same ESD protection and voltage requirements.