ICL3243EIVZ

Overview

The ICL3243EIVZ is a full-duplex RS-232 transceiver manufactured by Renesas Electronics Corporation. It integrates three drivers and five receivers within a 28-TSSOP package. The device operates on a single power supply ranging from 3V to 5.5V, ensuring compliance with EIA/TIA-232 and V.28/V.24 standards even at the minimum voltage of 3.0V. It supports data rates up to 250kbps under worst-case loading conditions. The component features ±15kV electrostatic discharge (ESD) protection on all RS-232 pins, adhering to IEC61000-4-2 air gap and human body model specifications. It includes an efficient onboard charge pump and automatic shutdown functionality to minimize standby current consumption.

Feature Summary

• Integrated automatic shutdown circuitry that reduces power consumption when peripheral devices are disconnected or removed
• Robust ±15kV ESD protection on transmitter outputs and receiver inputs for enhanced reliability in portable applications
• Onboard charge pump enables operation from a single low-voltage supply without requiring external negative voltages
• Pin-compatible design allows direct replacement of legacy 5V RS-232 transceivers in existing systems

Applications

• Personal digital assistants (PDAs) and handheld computers requiring low-power serial communication
• Laptop and notebook computer serial port implementations
• Portable computing devices where battery life optimization is critical
• Mixed 3.3V and 5.0V system interfaces

Procurement Notes

Verify the specific suffix 'IVZ' corresponds to the 28-TSSOP package variant during sourcing. Confirm RoHS3 compliance status as required by project specifications. Ensure the supplier provides valid traceability documentation for the Renesas Electronics Corporation origin. Cross-reference the datasheet revision history to confirm compatibility with current manufacturing labels and PCN updates.

Selection Notes

Select this component when designing systems requiring three transmit and five receive channels in a compact surface-mount footprint. It is suitable for replacing older 5V-only RS-232 chips in modern 3.3V environments. Consider the automatic shutdown feature if the application involves frequent cable connection cycles. Verify that the 250kbps guaranteed rate meets the system's timing requirements under maximum capacitive load conditions.

Part Context

This part belongs to the ICL32xxE series of low-power RS-232 transceivers. It shares functional similarities with the ICL3241EIVZ but offers additional receiver channels. The series is designed to bridge legacy serial standards with modern low-voltage logic families. It serves as a drop-in upgrade for various 5V RS-232 components, providing improved power efficiency while maintaining electrical compatibility.

Replacement Considerations

Publicly confirmed substitutes include MAX3243E and SP3243E. These alternatives offer pin-compatible replacements with similar electrical characteristics. Verify package dimensions and thermal performance before finalizing any substitution decision.