MAX3232ECDBR

Overview

The MAX3232ECDBR is an automotive-grade RS-232 transceiver manufactured by Texas Instruments. It integrates two line drivers, two line receivers, and a dual charge-pump circuit to enable operation from a single 3V to 5.5V supply. The device supports data signaling rates up to 250kbit/s with a maximum driver output slew rate of 30V/μs. It features ±15kV IEC ESD protection on all serial-port connection pins, including ground. The typical standby supply current is 300μA, and it requires four external 0.1μF capacitors for the charge pump. The component meets TIA/EIA-232-F standards and accepts 5V logic inputs while powered by a 3.3V supply.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards
• Integrated ±15kV IEC ESD protection across all serial port pins
• Single-supply operation enabled by internal dual charge-pump circuitry
• Pin-compatible alternative to high-speed SNx5C3232 devices

Applications

• Industrial PCs
• Wired networking equipment
• Data center and enterprise computing systems
• Battery-powered portable devices

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature range. Confirm the presence of the 'Q1' designation in the part number to ensure compliance with automotive reliability standards. Cross-reference the manufacturer's latest Package Option Addendum to validate material composition, lead finish specifications, and moisture sensitivity level ratings prior to final procurement decisions.

Selection Notes

Select this component when designing for environments requiring robust electrostatic discharge tolerance on serial interfaces. Ensure the system power supply remains within the 3V to 5.5V operating window. Verify that the application does not exceed the 250kbit/s data rate limit. Consider the thermal resistance characteristics if the device will operate at the upper limits of the recommended temperature range without adequate airflow.

Part Context

This device belongs to the MAX3232E-Q1 family of automotive RS-232 transceivers. It shares functional similarities with standard industrial variants but includes enhanced qualification for automotive use. The product line provides pin-compatible options for different speed requirements, allowing designers to upgrade to higher data rates using SNx5C3232 devices without changing the PCB layout.

Replacement Considerations

The catalog version MAX3232E serves as a non-automotive equivalent. For applications requiring higher data throughput, the SNx5C3232 offers a pin-compatible solution supporting speeds up to 1Mbit/s.