MAX3232IDR

Overview

The MAX3232IDR is a dual-channel RS-232 line driver and receiver manufactured by Texas Instruments. It operates from a single 3-V to 5.5-V power supply and integrates charge pumps requiring only four external 0.1-µF capacitors. The device provides two drivers and two receivers, supporting full-duplex communication at data rates up to 250 kbps. It features ±15-kV ESD protection on all RS-232 lines and meets TIA/EIA-232-F standards. The industrial temperature range extends from -40°C to +85°C, housed in a 16-pin SOIC package.

Feature Summary

• Integrated dual charge pump circuit enables operation from a single low-voltage supply without external inductors.
• Provides robust electrostatic discharge protection rated at ±15 kV across all serial port connection terminals.
• Maintains compatibility with standard RS-232 signaling levels while accepting 5-V logic inputs for 3.3-V systems.

Applications

• Industrial control systems requiring reliable serial communication interfaces.
• Portable battery-powered equipment utilizing low-power microcontrollers.
• Modem and printer connections adhering to TIA/EIA-232-F specifications.

Procurement Notes

Verify the specific suffix 'IDR' confirms the industrial temperature grade (-40°C to +85°C) and SOIC-16 surface-mount packaging. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor certificates prior to integration into regulated assemblies.

Selection Notes

Select this component when an industrial-grade operating temperature range is required alongside standard 250 kbps performance. Ensure the design accommodates the necessary four external capacitors for the internal charge pump. Consider higher-speed variants if data rates exceeding 250 kbps are necessary for the target application.

Part Context

This part belongs to the MAX3232 family of multichannel RS-232 transceivers designed for low-power applications. The 'I' designation indicates the extended industrial temperature range, distinguishing it from commercial variants like the MAX3232CDR. The 'DR' suffix specifies the tape-and-reel packaging format suitable for automated surface-mount assembly processes.

Replacement Considerations

The TRS3232EIDR serves as a parameter-equivalent replacement within the Texas Instruments portfolio. Other compatible alternatives include the ICL3232ECBNZ from Renesas Electronics. Verify pinout compatibility and electrical specifications before substituting these components in existing designs.