MAX232EIDR

Overview

The MAX232EIDR is a dual driver and receiver RS-232 transceiver manufactured by Texas Instruments. It operates on a single 4.5 V to 5.5 V supply and achieves data rates up to 250 kbps. The device integrates charge pumps requiring only four external capacitors to generate the necessary ±9 V levels for EIA-232 compliance. Packaged in a 16-pin SOIC, it supports full-duplex communication with an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates dual drivers and receivers for complete RS-232 signal conversion
• Utilizes internal charge pumps to eliminate the need for negative voltage supplies
• Provides robust electrostatic discharge protection across all ports

Applications

• Serial port interfacing between microcontrollers and PC-based systems
• Industrial control equipment requiring reliable serial communication
• Embedded systems connecting to modems or peripheral devices

Procurement Notes

Verify the specific suffix 'E' indicates extended industrial temperature performance compared to standard variants. Confirm the 'IDR' designation corresponds to the tape-and-reel packaging format suitable for automated surface-mount assembly processes. Cross-reference the manufacturer datasheet to ensure compatibility with current environmental compliance standards before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring full-duplex RS-232 connectivity within a 4.5 V to 5.5 V power domain. It is appropriate for applications needing 250 kbps throughput without external negative voltage generation circuits. Ensure the design accommodates the required four external capacitors for the internal charge pump operation to maintain signal integrity.

Part Context

This part belongs to the MAX232 family of interface integrated circuits designed for converting TTL/CMOS logic levels to RS-232 voltages. The MAX232EIDR specifically denotes the industrial temperature grade variant housed in a narrow SOIC package with reel packaging. It serves as a foundational component for legacy serial communication interfaces in modern embedded hardware designs.

Replacement Considerations

MAX232IDR: Standard commercial grade version with identical electrical specifications but limited to 0°C to +70°C operating range.