ICL3222IA-T

Overview

The ICL3222IA-T is a dual-driver, dual-receiver RS-232 transceiver manufactured by Renesas Electronics Corporation. It operates on a single power supply ranging from 3.0V to 5.5V and supports data rates up to 250kbps. The device features ±15kV ESD protection on I/O pins per IEC61000 standards. It includes manual and automatic power-down functions that reduce standby current to 1µA. The component meets EIA/TIA-232 and V.28/V.24 specifications at 3.0V. It utilizes efficient on-chip charge pumps requiring only four external 0.1µF capacitors. The package type is SSOP-20.

Feature Summary

• Provides ±15kV ESD protection on transmitter outputs and receiver inputs for enhanced signal integrity in harsh environments.
• Integrates manual and automatic power-down modes to minimize standby power consumption during idle periods.
• Ensures compatibility with 3.3V-only systems, mixed voltage architectures, and legacy 5.0V designs.

Applications

• Portable computing devices such as PDAs and notebook computers
• Laptop computer serial port implementations
• Palmtop and handheld terminal interfaces

Procurement Notes

Verify the specific suffix 'IA' against official Renesas documentation to confirm temperature range and package variant accuracy. Ensure the 'T' designation matches the required reel or cut tape packaging configuration for your assembly line. Cross-reference the manufacturer part number with authorized distributors to confirm current availability status and authenticity before procurement.

Selection Notes

Select this component when designing low-power RS-232 interfaces for battery-operated portable electronics. It serves as a direct pin-compatible replacement for older 5V MAX242E and SP312E devices. Choose this model if the design requires automatic power-down capabilities to extend battery life without hardware modifications. Verify that the system voltage falls within the 3.0V to 5.5V operating range.

Part Context

This device belongs to the ICL32xxE family of RS-232 transmitters and receivers designed for low-voltage operation. The family shares common architecture features including on-chip voltage converters and ESD protection. It is positioned as a low-power upgrade for legacy 5V RS-232 components, targeting applications where board space and energy efficiency are critical constraints.

Replacement Considerations

The datasheet identifies this device as a drop-in replacement for MAX3222E and SP312E. Verify pinout compatibility and voltage levels when substituting these specific competitor models. Confirm that the target application does not require the triple-driver configuration found in ICL324x variants.