ICL3222EIA

Overview

The ICL3222EIA is a low-power RS-232 transceiver manufactured by Renesas Electronics Corporation, operating on a single +3V to +5.5V power supply. It integrates two drivers and two receivers compliant with EIA/TIA-232 and V.28/V.24 specifications at the minimum voltage. The device features efficient on-chip charge pumps requiring only four small external capacitors. It includes an automatic power-down function that reduces standby current to 1µA when no valid signal is detected. The component supports data rates up to 250kbps and utilizes SSOP-16 packaging.

Feature Summary

• Automatic power-down circuitry for significant standby current reduction
• Integrated charge pump eliminating need for dual voltage supplies
• ESD protection on RS-232 I/O pins
• Low capacitor count requirement for board space optimization

Applications

• Battery-powered portable computers and PDAs
• Laptop and notebook serial ports
• Handheld communication peripherals

Procurement Notes

Verify the specific suffix 'EIA' against the manufacturer's current datasheet to confirm package type and temperature range. Ensure the ordering code matches the exact pinout and RoHS compliance status required for the design. Cross-reference the manufacturer's official distribution channels for authenticity.

Selection Notes

Select this component for designs requiring minimal external capacitance and ultra-low standby power in 3V systems. It serves as a direct replacement for older 5V-only RS-232 transceivers in modern low-voltage architectures. Verify that the 250kbps data rate meets the application's throughput requirements.

Part Context

This part belongs to the Intersil (now Renesas) ICL32xx family of RS-232 transceivers. The family is characterized by its ability to operate from a single low-voltage supply while maintaining standard RS-232 output levels through internal charge pumping technology.

Replacement Considerations

Publicly confirmed substitutes include the ST3232C and MAX3232 series. Verify pin compatibility and electrical specifications before substitution.