MAX3232CD

Overview

The MAX3232CD is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates from a single 3.0 V to 5.5 V power supply and includes two drivers and two receivers for full-duplex communication. The device achieves data rates up to 250 kb/s with a maximum output slew rate of 30 V/µs. It requires four external 0.1 µF capacitors for its charge pump circuitry. The component provides ±15 kV electrostatic discharge (ESD) protection on all RS-232 lines. It functions within an operating temperature range of 0°C to +70°C and is housed in a SOIC-16 package.

Feature Summary

• Provides true RS-232 signal levels using only four small external capacitors
• Includes ±15 kV ESD protection on serial port connection terminals
• Supports low-power operation with typical supply current of 300 µA

Applications

• Connecting asynchronous communication controllers to serial connectors
• Battery-powered equipment and handheld devices
• Peripherals and printers requiring RS-232 interfaces

Procurement Notes

Verify the specific suffix 'CD' corresponds to the commercial temperature grade (0°C to +70°C) and SOIC-16 package when ordering. Confirm that the required four 0.1 µF external capacitors are included in the system design, as they are essential for the internal charge pump operation. Ensure voltage levels match the 3.0 V to 5.5 V specification.

Selection Notes

Select this component for applications requiring standard RS-232 signaling at speeds up to 250 kb/s. It is suitable for systems powered by a single 3 V or 5 V source. For higher data rates approaching 1 Mbps, consider the SN65C3232 variant. Verify that the SOIC-16 package fits the PCB layout constraints and that the commercial temperature range meets environmental requirements.

Part Context

The MAX3232 series is a widely used family of low-power RS-232 transceivers designed for portable and battery-operated applications. The MAX3232CD specifically denotes the commercial grade version in a surface-mount SOIC-16 package. It serves as a bridge between microcontroller logic levels and standard RS-232 voltage levels, facilitating serial communication in embedded systems.

Replacement Considerations

The SN65C3232EDRE4 is a documented alternative offering similar functionality with potentially different performance characteristics.