ICL3243CAZ-T

Overview

The ICL3243CAZ-T is a low-power RS-232 transceiver manufactured by Renesas Electronics. It operates within a supply voltage range of 3V to 5.5V and supports data rates up to 250kbps. The device integrates three drivers and five receivers, providing full-duplex communication capabilities. It features automatic powerdown functionality that reduces standby current to 1µA. The component includes on-chip charge pumps requiring only four external 0.1µF capacitors and offers 15kV ESD protection per the human body model.

Feature Summary

• Integrates manual and automatic powerdown functions to minimize standby power consumption
• Includes on-chip voltage converters eliminating the need for external inductors or transformers
• Provides robust electrostatic discharge protection rated at 15kV via the human body model

Applications

• Portable computing devices such as PDAs and palmtops
• Notebook and laptop computer serial interfaces
• Battery-powered systems requiring low operational and standby power

Procurement Notes

Verify the specific suffix CAZ against official Renesas documentation to confirm package type and RoHS compliance status. Confirm the manufacturer designation as Renesas Electronics rather than legacy Intersil branding. Ensure the ordering information matches the exact part number to avoid discrepancies in packaging or temperature ratings.

Selection Notes

Select this component for applications requiring compatibility with 3.3V and 5.0V mixed logic systems. The device serves as a drop-in replacement for several legacy MAX3243 variants. Consider the 28-pin SSOP package constraints and the requirement for four small external capacitors when designing the PCB layout.

Part Context

This part belongs to the ICL32XX family of RS-232 transceivers designed for low-voltage operation. The series targets portable electronics where board space and battery life are critical. The ICL3243 variant specifically provides the driver and receiver count necessary for standard PC serial port implementations.

Replacement Considerations

Publicly documented drop-in replacements include the MAX3243, MAX3241, SP3243, and ICL3243 from Intersil. Verify pinout compatibility and electrical specifications before substituting.