MAX232DG4

Overview

The MAX232DG4 is a dual driver and receiver RS-232 transceiver manufactured by Texas Instruments. It operates on a single 5 V supply with a voltage range of 4.5 V to 5.5 V. The device supports full-duplex communication at data rates up to 120 kb/s. It features two drivers and two receivers within a 16-pin SOIC-Narrow package. The component includes an internal charge pump requiring external capacitors for voltage conversion. It functions without a shutdown mode and provides ESD protection. The operating temperature range extends from -40°C to +85°C, with a typical supply current of 10 mA.

Feature Summary

• Dual EIA-232 driver and receiver configuration for full-duplex serial communication
• Single-supply operation enabled by internal charge pump circuitry
• Integrated ESD protection for signal lines
• Industrial-grade temperature rating for extended environmental reliability

Applications

• RS-232 serial communication interface implementation
• Modem connection circuits
• Portable instruments requiring serial data exchange
• Bar code scanners and POS terminals

Procurement Notes

Verify the specific suffix DG4 indicates lead-free status and RoHS compliance when sourcing. Confirm the package type matches the design requirements as it utilizes a narrow SOIC footprint. Check manufacturer documentation for lifecycle status updates, as availability may vary based on production schedules.

Selection Notes

Select this component for applications requiring standard RS-232 signaling with a single 5 V power source. Ensure the design accommodates the required external capacitors for the charge pump. Verify that the 120 kb/s data rate meets system timing requirements. Consider the 16-pin SOIC package dimensions for PCB layout constraints.

Part Context

This part belongs to the MAX232 family of dual drivers and receivers designed for EIA/TIA-232-F interfaces. It serves as a bridge between TTL/CMOS logic levels and RS-232 voltage levels. The DG4 suffix typically denotes a lead-free and RoHS-compliant version of the standard MAX232 device.

Replacement Considerations

MAX232DRG4 is a tape-and-reel variant of the same functional device. Other compatible parts include the MAX232ESE+ from Analog Devices/Maxim Integrated.