ICL3232CBN-T

Overview

The ICL3232CBN-T is a dual driver, dual receiver RS-232 transceiver manufactured by Renesas Electronics. It operates on a single power supply ranging from 3V to 5.5V and meets EIA/TIA-232 and V.28/V.24 specifications even at the minimum voltage of 3.0V. The device features an internal charge pump requiring only four external 0.1µF capacitors. It supports data rates up to 250kbps with a guaranteed slew rate of 6V/µs. Key electrical parameters include a maximum operating current of 1mA in active mode and 1µA in shutdown mode. The component provides 15kV ESD protection per the human body model and functions within a temperature range of 0°C to +70°C.

Feature Summary

• Integrated charge pump eliminates the need for external inductors or transformers
• Automatic power-down circuitry reduces standby current when no valid RS-232 signal is present
• Receiver hysteresis improves noise immunity during signal detection
• Pin-compatible upgrade path for legacy low-power RS-232 applications

Applications

• Battery-powered handheld and portable devices
• Laptop computers and personal digital assistants (PDAs)
• Modems and peripheral equipment interfaces
• Digital cameras and cellular mobile phones

Procurement Notes

Verify the suffix 'T' indicates tape-and-reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation. Ensure the specific lot date code aligns with project requirements. Cross-reference the exact part number against the latest datasheet revision to confirm pinout and electrical characteristics remain unchanged.

Selection Notes

Select this component for systems requiring full-duplex RS-232 communication with minimal external passive components. It is suitable for mixed 3.3V and 5.0V logic environments. Consider the 16-pin SOIC package dimensions for PCB layout constraints. Evaluate the 1µA shutdown current benefit for battery-operated designs where cable disconnection triggers power saving.

Part Context

This device belongs to the ICL3232 series of RS-232 interface integrated circuits. It serves as a low-power alternative to traditional multi-supply RS-232 drivers. The product line targets portable electronics where board space and energy efficiency are critical design constraints. It maintains compatibility with standard serial port protocols while simplifying power management.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.