MAX3243CDWR

Overview

The MAX3243CDWR is a Texas Instruments RS-232 interface integrated circuit featuring three drivers and five receivers in a single package. It operates on a single 3 V to 5.5 V power supply with a typical operating current of 1 mA. The device supports full-duplex communication at data rates up to 250 kbps. It utilizes a 28-SOIC surface-mount package and functions within an industrial temperature range of 0°C to +70°C. Key electrical characteristics include 15 kV ESD protection and a propagation delay of 0.15 µs.

Feature Summary

• Integrated shutdown mode for significant power reduction during idle periods
• Built-in charge pump circuitry eliminates the need for external dual-voltage supplies
• High electrostatic discharge tolerance protects sensitive ports from damage
• Single-supply operation simplifies system design and reduces component count

Applications

• Industrial serial communication equipment requiring robust signal integrity
• Portable battery-powered devices utilizing low-power RS-232 interfaces
• Modems and fax machines needing multi-channel transmission capabilities
• Point-of-sale terminals and medical instrumentation with strict ESD requirements

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm package type, temperature grade, and RoHS compliance status. Ensure the ordering part number matches the required pinout and electrical specifications for your target application. Cross-reference manufacturer datasheets to validate lead times and availability through authorized distribution channels before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring multiple transmit and receive lines within a compact footprint. The 250 kbps speed suits standard baud rates while the 1 mA quiescent current benefits battery-operated designs. Confirm that the SOIC-28 package dimensions fit the PCB layout constraints and that the 0°C to +70°C operating range meets environmental conditions.

Part Context

This part belongs to the MAX3243 family of multi-channel RS-232 transceivers designed for high-performance serial communications. The CDWR variant specifically denotes the commercial temperature range and reel packaging format. It serves as a bridge between microprocessor logic levels and RS-232 voltage standards, enabling reliable data exchange in diverse electronic environments.

Replacement Considerations

MAX3243IDWR: Offers extended -40°C to +85°C industrial temperature range in identical SOIC-28 package. MAX3243EIDWR: Provides 500 kbps data rate capability with improved performance metrics. Verify pin compatibility and thermal specifications when substituting these variants.