MAX3232IDG4

Overview

The MAX3232IDG4 is a dual RS-232 transceiver manufactured by Texas Instruments, designed for full-duplex communication. It operates within a supply voltage range of 4.5 V to 5.5 V and supports data rates up to 120 kb/s. The device integrates two drivers and two receivers in a single SOIC-Narrow-16 package. Key electrical specifications include a maximum operating temperature of +85°C and a minimum of -40°C. The quiescent supply current is specified at 10 mA. This component provides ESD protection and is intended for industrial and commercial applications requiring reliable serial interface connectivity.

Feature Summary

• Integrates dual drivers and dual receivers for complete full-duplex RS-232 communication capabilities.
• Operates on a standard 5 V power supply with defined voltage limits for stable performance.
• Provides electrostatic discharge (ESD) protection to safeguard connected serial interfaces.
• Utilizes a surface-mount SOIC-Narrow-16 package for compact circuit board integration.

Applications

• Industrial control systems requiring robust serial communication links.
• Commercial equipment utilizing RS-232 protocols for data exchange.
• Embedded systems needing isolated signal transmission between microcontrollers and peripherals.

Procurement Notes

Verify the specific suffix 'DG4' against the manufacturer's latest documentation to confirm pinout compatibility and RoHS status. Confirm that the 4.5 V minimum supply voltage requirement aligns with the target system design, as this differs from lower-voltage variants. Ensure the SOIC-Narrow-16 footprint matches the PCB layout constraints before finalizing procurement decisions.

Selection Notes

Select this component when a 5 V supply is available and a 120 kb/s data rate suffices for the application. Compare against the MAX3232 series if a wider 3 V to 5.5 V input range or higher 250 kb/s speed is required. Verify thermal requirements for the -40°C to +85°C operating range. Consider the TRS3232 series for potential future replacements if availability becomes an issue.

Part Context

This part belongs to the legacy MAX232 family, which established the standard for single-chip RS-232 transceivers. Unlike the newer MAX3232 series, it lacks low-voltage operation and shutdown features. It serves as a direct replacement for older MAX232 designs but offers improved reliability through modern manufacturing processes. The 'G4' suffix typically indicates lead-free and RoHS compliance.

Replacement Considerations

Public confirmed substitute part numbers include TRS3232EIDR. Verify pin-to-pin compatibility and electrical parameter alignment before substitution.