MAX3232CDRG4

Overview

The MAX3232CDRG4 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 integrates dual charge pump circuits requiring only four external 0.1-µF capacitors. It supports data rates up to 250 kbps with a propagation delay of 0.3 µs. The component functions within an industrial temperature range of -40°C to +85°C and provides ±15-kV electrostatic discharge (ESD) protection on all RS-232 lines, including ground.

Feature Summary

• Integrated dual charge pump circuitry enables operation from a single low-voltage power supply without requiring negative voltage generation.
• Provides robust ±15-kV ESD protection on all RS-232 signal lines and ground pins to safeguard connected serial ports.
• Complies with TIA/EIA-232-F standards while maintaining compatibility with legacy MAX232-based designs.

Applications

• Serial port connections in personal computers and peripheral devices
• Modem interfacing in portable equipment
• Communication interfaces for handheld terminals and PDAs

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free and RoHS compliance status as per Texas Instruments documentation. Confirm the package variant matches the required surface-mount footprint. Check current lifecycle status to ensure availability for new designs, as older variants may be discontinued. Validate that the operating temperature range meets the environmental requirements of the target application.

Selection Notes

Select this component when a dual-channel RS-232 transceiver is required for space-constrained applications. It serves as a drop-in replacement for the MAX232 in many designs due to pin compatibility. Ensure the system power supply remains within the 3-V to 5.5-V range. Consider the 250 kbps speed limit if higher baud rates are necessary for the specific communication protocol.

Part Context

This part belongs to the MAX3232 family of multichannel RS-232 transceivers. It shares functional similarities with the MAX3221 and MAX3238 but offers a specific configuration of two drivers and two receivers. The device is designed to bridge microcontrollers or DSPs with standard RS-232 connectors using minimal external components.

Replacement Considerations

The MAX3232EIDR is a verified alternative offering an extended industrial temperature range. The TRS3232EIDR is a newer generation replacement with improved performance characteristics. Verify pinout compatibility before substituting these parts in existing layouts.