ICL3222IB-T

Overview

The ICL3222IB-T is a dual RS-232 transmitter and receiver manufactured by Renesas Electronics Corporation. It operates within a supply voltage range of +3.0V to +5.5V, ensuring compliance with EIA/TIA-232 and V.28/V.24 specifications even at the lower 3.0V threshold. The device supports data rates up to 250kbps under worst-case load conditions and incorporates efficient on-chip charge pumps that require only four external 0.1µF capacitors. It features ±15kV ESD protection on RS-232 I/O pins per IEC61000 standards and includes automatic power-down functionality to reduce standby current to 1µA.

Feature Summary

• Integrated automatic power-down mechanism reduces standby consumption to 1µA when idle
• Robust ±15kV electrostatic discharge protection on all RS-232 input and output pins
• On-chip voltage conversion eliminates need for external DC-to-DC converters
• Compatible with 3.3V-only, mixed 3.3V/5.0V, and 5.0V-only system architectures

Applications

• Portable computing devices such as PDAs and palmtops requiring low power consumption
• Notebook and laptop computers utilizing serial communication ports
• ISDN terminal adaptors and peripheral interfaces demanding EIA/TIA-232 compliance

Procurement Notes

Verify the specific suffix 'IB' against official Renesas documentation to confirm package type and temperature grade. Ensure the ordering code matches the exact tape-and-reel quantity specified in the manufacturer's latest datasheet. Cross-reference the RoHS compliance status and lead-free designation with the current production lifecycle notice.

Selection Notes

Select this component for applications requiring dual-channel RS-232 communication with minimal external capacitance. It serves as a direct drop-in replacement for legacy MAX3222E and SP322E devices. Consider the automatic power-down feature for battery-operated systems where standby current reduction is critical for extending operational life.

Part Context

This part belongs to the ICL32xxE family of low-power RS-232 transceivers designed for portable electronics. The family shares common architecture including on-chip charge pumps and ESD protection, differing primarily in channel count and specific power management features like manual versus automatic shutdown capabilities.

Replacement Considerations

Officially documented pin-compatible replacements include the MAX3222E, SP322E, and HIN232E. Verify electrical parameter compatibility, particularly regarding drive strength and operating voltage ranges, before substituting these components in existing designs.