MAX3232ECUP

Overview

The MAX3232ECUP is a multichannel RS-232 line driver and receiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single 3V to 5.5V supply and supports data rates up to 250kbit/s with a maximum slew rate of 30V/μs. The device integrates two drivers and two receivers, utilizing a dual charge-pump circuit that requires four external capacitors (typically 4 × 0.1μF). It provides ±15kV IEC ESD protection on all serial-port connection pins, including ground. The component is housed in a 16-pin TSSOP package measuring 5mm x 6.4mm.

Feature Summary

• Dual charge-pump architecture enabling true RS-232 performance from a single low-voltage supply without negative voltage rails
• Integrated ±15kV IEC electrostatic discharge protection across all serial port terminals and ground connections
• Full duplex operation with independent logic-level inputs and standard RS-232 outputs for asynchronous communication

Applications

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

Procurement Notes

Verify the specific suffix 'ECUP' against official manufacturer documentation to confirm exact packaging quantity and reel specifications. Ensure the procurement channel sources components directly from authorized distributors to guarantee authenticity and traceability. Confirm RoHS compliance status and lead finish details prior to finalizing orders.

Selection Notes

Select this component when interfacing microcontrollers operating at 3.3V or 5V with standard RS-232 ports requiring robust ESD protection. Verify that the application environment does not exceed the recommended operating temperature range of -40°C to 85°C. Ensure sufficient PCB area is allocated for the required four external charge-pump capacitors.

Part Context

This part belongs to the MAX3232 family of low-power RS-232 transceivers designed for mobile and battery-operated applications. It serves as a bridge between TTL/CMOS logic levels and RS-232 signaling standards. The ECUP designation indicates a specific surface-mount variant within the broader product line managed by Maxim Integrated.

Replacement Considerations

The SNx5C3232 series is documented as a pin-compatible alternative offering higher data rates up to 1Mbit/s. Verify thermal characteristics and capacitor requirements when substituting, as high-speed variants may have different transient current demands.