MAX3232CDB

Overview

The MAX3232CDB is a dual driver and dual receiver RS-232 transceiver manufactured by Texas Instruments. It operates from a single 3 V to 5.5 V power supply, utilizing an internal charge pump and four external capacitors to generate the required ±9 V levels for RS-232 communication. The device supports data rates up to 250 kbps with a maximum output slew rate of 30 V/µs. It features full-duplex operation and includes ±15 kV electrostatic discharge (ESD) protection on all RS-232 lines. The component is housed in a 16-pin SSOP package and is designed for surface-mount installation.

Feature Summary

• Integrates dual drivers and dual receivers for full-duplex serial communication within a compact 16-pin SSOP package.
• Provides ±15 kV ESD protection on all RS-232 signal terminals, including ground, ensuring robust interface reliability.
• Operates from a single 3 V to 5.5 V supply voltage using only four small external capacitors for charge pump functionality.
• Meets TIA/EIA-232-F standards while maintaining low power consumption suitable for battery-powered applications.

Applications

• Connecting asynchronous controllers to serial port connectors in industrial equipment.
• Providing RS-232 interfaces for portable instruments and handheld devices.
• Linking computer peripherals requiring standard RS-232 signaling.
• Enabling serial communication in embedded systems with 3.3 V or 5 V logic levels.

Procurement Notes

Verify the specific suffix 'DB' corresponds to the SSOP-16 package variant when sourcing. Confirm that the order quantity matches the manufacturer's reel or tube specifications. Ensure the procurement channel provides valid RoHS compliance documentation. Cross-reference the manufacturer part number with distributor catalogs to confirm availability and authenticity before finalizing orders.

Selection Notes

Select this component when a dual-channel RS-232 interface is required with integrated ESD protection. It is appropriate for designs operating between 3 V and 5.5 V without needing negative voltage rails. Consider the SSOP-16 package constraints for PCB layout. Verify that the 250 kbps data rate meets the system requirements; higher speed alternatives exist if needed.

Part Context

The MAX3232CDB belongs to the MAX3232 family of multichannel RS-232 line drivers and receivers. This series is widely used for converting TTL/CMOS logic levels to RS-232 voltages. The 'C' designation typically indicates commercial temperature range performance, while 'DB' specifies the SSOP package type. It serves as a standard solution for legacy serial port implementations in modern low-voltage digital systems.

Replacement Considerations

The MAX3232CDR is a pin-compatible SOIC-16 alternative offering similar electrical characteristics. For wider temperature ranges, consider the MAX3232IDWR variant. Higher-speed options like the SN65C3232 provide 1 Mbps capability but may require different capacitor values. Always verify package dimensions and thermal performance when substituting.