MAX3232CDWRE4

Overview

The MAX3232CDWRE4 is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates from a single 3-V to 5.5-V power supply and includes two drivers and two receivers for full-duplex communication. The device features ±15-kV electrostatic discharge (ESD) protection on all RS-232 lines, including the ground pin, ensuring robustness in harsh environments. It utilizes a dual charge-pump circuit requiring only four small external capacitors. The component supports data signaling rates up to 250 kbps and meets TIA/EIA-232-F standards. It is housed in a 16-pin SOIC-Wide package with an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated dual charge pump eliminates need for external inductors or multiple voltage supplies
• Provides ±15-kV ESD protection across all RS-232 signal pins and ground
• Compatible with 3.3-V logic inputs while powered by 5-V supplies
• Low power consumption with typical shutdown current significantly reducing standby drain

Applications

• Portable equipment and battery-powered devices requiring low power interface solutions
• Industrial control systems needing reliable RS-232 communication over noisy environments
• Modems and fax machines utilizing standard serial port connections
• Point-of-sale terminals and medical instruments with serial connectivity requirements

Procurement Notes

Verify the suffix RE4 indicates tape and reel packaging when sourcing. Confirm the C grade corresponds to the commercial temperature range if industrial specs are not required. Ensure compatibility with existing PCB footprints for the SOIC-Wide-16 package. Check for RoHS compliance documentation specific to this revision. Validate that the manufacturer is Texas Instruments to avoid counterfeit components.

Selection Notes

Select this part when full-duplex RS-232 communication is required with moderate data rates up to 250 kbps. Choose the CDWRE4 variant specifically for surface-mount assembly using reel packaging. Consider this device for designs constrained by space due to its minimal external capacitor count. Opt for this component over higher-speed variants if cost sensitivity and lower power consumption are primary design drivers.

Part Context

This component belongs to the MAX3232 family of true RS-232 transceivers known for their low-power operation and ease of use. The family shares core functionality but varies in packaging, temperature ranges, and shipping formats. The CDWRE4 designation specifies the wide SOIC package, commercial/industrial temperature grade, and reel-based distribution method within the broader product line.

Replacement Considerations

MAX3232CDWR serves as the non-E4 equivalent in identical packaging without the specific environmental or manufacturing revision code. MAX3232IDWR offers the same electrical performance in the same package but may differ in specific lot traceability or long-term availability status.