MAX3232CDWR

Overview

The MAX3232CDWR is a dual transmitter and receiver RS-232 transceiver manufactured by Texas Instruments. It operates on a single 3 V to 5.5 V power supply, utilizing an internal charge pump to generate the required voltage levels for RS-232 communication. The device supports data rates up to 250 kbps and features full-duplex operation with two drivers and two receivers. It includes ±15 kV electrostatic discharge (ESD) protection on all RS-232 lines. The component is housed in a 16-pin SOIC package and is designed for surface-mount installation.

Feature Summary

• Integrates dual drivers and dual receivers for full-duplex serial communication within a single compact package.
• Provides robust ±15 kV ESD protection on all signal lines to safeguard connected serial ports from damage.
• Utilizes an internal charge pump circuit to enable operation from a single low-voltage power supply without external high-voltage generation.

Applications

• Connecting microcontrollers or embedded systems to PC serial ports via DB9 connectors.
• Implementing RS-232 interfaces in portable battery-powered devices requiring low power consumption.
• Establishing point-to-point communication links between industrial control equipment and monitoring terminals.

Procurement Notes

Verify the specific suffix 'CDWR' corresponds to the commercial temperature range and tape-and-reel packaging format. Confirm that the SOIC-16 footprint matches the target PCB design. Ensure compliance with RoHS directives if required by the end product specifications. Cross-reference the manufacturer's latest datasheet for any pinout revisions or recommended external capacitor values.

Selection Notes

Select this component when a dual-channel RS-232 interface is required for commercial-grade applications. It is suitable for designs operating between 0°C and +70°C. Consider alternative packages such as SSOP or TSSOP if space constraints differ. Verify that the 250 kbps data rate meets the system's throughput requirements compared to higher-speed alternatives like the MAX3243.

Part Context

This part belongs to the MAX3232 family of multichannel RS-232 line drivers and receivers. The family offers various package options including PDIP, SOIC, SSOP, and TSSOP. Variants differ primarily in temperature ranges, packaging styles, and ESD protection levels. The CDWR designation specifically indicates the SOIC-16 package variant intended for surface-mount technology assembly.

Replacement Considerations

Direct functional substitutes include other MAX3232 variants with different packages, such as MAX3232IDWR (industrial temperature range) or MAX3232CDBR (SSOP package). For higher performance, the MAX3243 series provides increased data rates and additional channels but requires software configuration changes.