MAX232DR

Overview

The MAX232DR is a dual driver/receiver integrated circuit manufactured by Texas Instruments, designed for RS-232 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 features full-duplex transmission with two drivers and two receivers in a 16-SOIC surface-mount package. It functions across an industrial temperature range of -40°C to +85°C and includes ESD protection capabilities.

Feature Summary

• Integrates dual EIA-232 drivers and receivers for complete serial communication functionality
• Utilizes internal charge pump circuitry to generate required voltage levels from a single 5-V supply
• Provides robust signal integrity through Schmitt trigger inputs and defined receiver hysteresis

Applications

• Industrial control systems requiring reliable serial data exchange
• Embedded microcontroller interfaces for PC communication
• Point-of-sale terminals and barcode scanners

Procurement Notes

Verify the specific suffix DR indicates tape-and-reel packaging when sourcing components. Confirm RoHS compliance status as per current manufacturer documentation. Ensure the operating temperature grade matches the application requirements, noting that some variants may differ in thermal specifications.

Selection Notes

Select this component for designs requiring standard RS-232 signaling with minimal external passive components. Compare against the MAX232N for through-hole alternatives or the MAX232IDR for identical electrical performance in narrow SOIC packages. Validate pin compatibility if replacing legacy designs.

Part Context

This part belongs to the widely adopted MAX232 family of interface ICs. It serves as a bridge between TTL/CMOS logic levels and RS-232 voltage standards. The DR suffix specifically denotes the surface-mount SOIC package configuration, distinguishing it from PDIP or wide SOIC variants within the same product line.

Replacement Considerations

MAX232DRG4 is a verified lead-free variant with identical electrical characteristics. MAX232ESE+ from Analog Devices offers a compatible function but requires verification of pinout and timing parameters.