MAX3232ECPE

Overview

The MAX3232ECPE is a dual driver and receiver RS-232 transceiver designed for 3V to 5.5V single-supply operation. It incorporates an internal dual charge pump circuit requiring four external capacitors to generate the necessary ±9V levels for true RS-232 signaling. The device supports data rates up to 250kbit/s with a maximum slew rate of 30V/µs. It provides ±15kV IEC ESD protection on all serial port connection pins, including ground. The component operates within a temperature range of -40°C to +85°C and features low standby current consumption typical of 300µA.

Feature Summary

• Dual drivers and receivers provide full-duplex communication capability between asynchronous controllers and serial connectors.
• Integrated dual charge pump eliminates the need for negative supply voltages by generating required RS-232 levels from a single positive supply.
• Enhanced electrostatic discharge protection ensures robustness against high-voltage static events on input and output lines.
• Low power consumption characteristics make the device suitable for battery-operated portable equipment.

Applications

• Industrial PCs
• Wired networking systems
• Data center and enterprise computing infrastructure
• Battery-powered handheld devices

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm RoHS compliance status and lead finish specifications against the manufacturer's latest orderable information. Ensure the supplier source is authorized to guarantee authenticity and traceability for automotive or industrial applications.

Selection Notes

Select this component when interfacing 3.3V or 5V logic microcontrollers with standard RS-232 ports. Verify that the application requires only two transmit and receive channels. Check if the 250kbit/s data rate meets system timing requirements. Consider alternative pin-compatible parts if higher data speeds are necessary.

Part Context

This device belongs to the MAX3232 family of multichannel RS-232 line drivers and receivers. It shares functional compatibility with earlier generations while offering improved ESD protection and lower power consumption. The product line includes variants optimized for different voltage ranges and data rates.

Replacement Considerations

SNx5C3232 series devices offer pin-compatible alternatives with higher data rate capabilities up to 1Mbit/s. Verify electrical parameter alignment before substitution.

FAQ

What external components are required for the charge pump?

Four small external capacitors are required. Typical values are 0.1µF for 3.3V operation and 0.047µF or 0.33µF depending on the specific capacitor placement for 5V operation.

Does the device support 5V logic inputs when powered by 3.3V?

Yes, the MAX3232ECPE accepts 5V logic inputs even when the VCC supply is 3.3V.

What is the maximum data signaling rate?

The device operates at data signaling rates up to 250kbit/s.