MAX232NG4

Overview

The MAX232NG4 is a dual EIA-232 driver and receiver manufactured by Texas Instruments, designed for RS-232 communication interfaces. It operates on a single 5 V power supply with a range of 4.5 V to 5.5 V. The device features two drivers and two receivers supporting full-duplex communication at data rates up to 120 kb/s. It utilizes an internal charge pump requiring only four external capacitors. Key electrical parameters include a propagation delay of 0.5 µs, a maximum operating temperature of +85 °C, and a minimum of -40 °C. The unit draws 10 mA of operating current and is housed in a 16-pin SOIC-Narrow package.

Feature Summary

• Dual driver and receiver configuration for full-duplex serial communication
• Single 5 V power supply operation eliminating need for negative voltage rails
• Integrated charge pump circuitry reduces external component count
• ESD protection capabilities for interface reliability

Applications

• RS-232 serial port interfacing for microcontrollers
• Modem communication systems
• Portable computer serial connections
• Battery-powered RS-232 devices

Procurement Notes

Verify the specific suffix 'NG4' against official Texas Instruments documentation to confirm package type and RoHS compliance status. Confirm end-of-life or obsolescence status prior to procurement planning. Ensure the supplier provides valid traceability documents matching the manufacturer's part identification standards.

Selection Notes

Select this component when designing systems requiring standard EIA/TIA-232-F compatibility with a single 5 V supply. It is suitable for applications where board space is limited due to the minimal external capacitor requirement. Verify that the 120 kb/s data rate meets system timing requirements and that the SOIC-Narrow package fits the PCB layout constraints.

Part Context

This part belongs to the MAX232 family of line drivers/receivers intended for EIA/TIA-232E communications. The 'G4' suffix typically indicates lead-free and RoHS-compliant manufacturing processes from Texas Instruments. It serves as a bridge between TTL/CMOS logic levels and RS-232 voltage levels.

Replacement Considerations

MAX232IDR: Surface-mount alternative with similar electrical characteristics. MAX232IN: Through-hole PDIP version of the same functional core. SN75C3232: Higher speed (1 Mbps) CMOS-compatible replacement.