MAX239CWG+T

Overview

The MAX239CWG+T is a multichannel RS-232 transceiver designed for EIA/TIA-232E and V.28/V.24 interfaces, operating from a single +5V supply. It integrates three drivers and five receivers with full-duplex communication capability. The device supports data rates up to 120 kb/s and operates within a commercial temperature range of 0°C to +70°C. Electrical characteristics include a typical propagation delay of 10 µs and a quiescent supply current of 1 mA. It utilizes an internal charge pump requiring external capacitors to generate the necessary ±10V levels for RS-232 signaling.

Feature Summary

• Integrates dual charge-pump DC-DC voltage converters to generate required RS-232 voltage levels from a single +5V source
• Provides three independent driver channels and five receiver channels for complex serial communication topologies
• Designed specifically for applications where bipolar ±12V power supplies are unavailable

Applications

• Interface translation between TTL/CMOS logic and RS-232 standards
• Multidrop RS-232 network implementations
• Portable diagnostics equipment requiring serial connectivity

Procurement Notes

Verify the specific suffix 'CWG' against the manufacturer's official ordering information table to confirm the package type and temperature grade. Ensure that the component designation matches the exact part number required for the design specifications before procurement.

Selection Notes

Select this component when the application requires more than two transmitter or receiver channels. Verify that the system can accommodate the external capacitors needed for the integrated charge pump circuitry. Confirm that the 120 kb/s data rate meets the communication requirements.

Part Context

This component belongs to the MAX220–MAX249 family of line drivers and receivers. This series provides various channel configurations and package options to support different interface needs while maintaining compatibility with standard RS-232 protocols.

Replacement Considerations

Consult the official selection table in the datasheet for direct pin-compatible alternatives within the MAX220–MAX249 family that offer similar channel counts.