ICL3223CV

Overview

The ICL3223CV is a dual driver, dual receiver RS-232 transceiver manufactured by Intersil. It operates on a single power supply ranging from 3V to 5.5V and supports full-duplex communication at data rates up to 250 kb/s. The device features ±15 kV electrostatic discharge (ESD) protection on all RS-232 lines. It utilizes an internal charge pump requiring only four external capacitors for voltage generation. The component is housed in a 20-pin SSOP package and is designed for low-power applications with automatic power-down capabilities.

Feature Summary

• Integrated charge pump eliminates the need for external inductors or transformers
• Provides robust ±15 kV ESD protection on RS-232 input and output pins
• Supports operation with standard small-value external capacitors
• Features automatic power-down mode to minimize standby current consumption

Applications

• Portable computers and notebook systems
• Battery-powered industrial equipment
• Modems and handheld terminals
• Point-of-sale (POS) systems

Procurement Notes

Verify the specific suffix 'CV' against official Renesas/Intersil documentation to confirm package type and temperature range. Confirm availability status as older Intersil models may be discontinued or superseded by newer equivalents. Ensure compliance with RoHS directives if required for the target application.

Selection Notes

Select this component when a dual-channel RS-232 interface is required for 3V or 5V logic systems. It serves as a direct replacement for legacy MAX221/MAX242 devices in designs prioritizing low quiescent current. Verify that the PCB layout accommodates the necessary external capacitors for the charge pump circuit.

Part Context

This part belongs to the ICL32xxE family of RS-232 transceivers known for low power consumption and high ESD tolerance. The series was widely adopted in the transition period from 5V to 3.3V logic levels. Intersil's interface division was later acquired by Renesas Electronics, which continues to support these legacy interface products.

Replacement Considerations

ICL3223ECAZ

FAQ

What is the minimum data rate guaranteed by the ICL3223CV?

The datasheet guarantees a minimum data rate of 250 kb/s under worst-case load conditions.

How many external capacitors are required for operation?

Four external capacitors are required to support the internal charge pump for generating the positive and negative voltages.

Does the ICL3223CV include automatic power-down functionality?

Yes, the device includes automatic power-down circuitry that reduces supply current to approximately 1 µA when no valid signal is present on the receivers.