ICL3221ECA-T

Overview

The ICL3221ECA-T is a single-driver, single-receiver RS-232 transceiver manufactured by Renesas Electronics under the Intersil brand. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 250 kb/s. The device features full-duplex communication with an internal charge pump and automatic shutdown functionality that reduces standby current to 1 mA. It provides ±15 kV ESD protection on RS-232 pins and operates in commercial temperatures from 0°C to +70°C. The component is housed in a 16-pin SSOP package.

Feature Summary

• Automatic power-down circuitry activates when peripherals disconnect or cables are removed to minimize system power consumption without hardware modifications.
• Integrated charge pump enables compliance with EIA/TIA-232 standards at low supply voltages while maintaining efficient operation.
• Robust electrostatic discharge protection rated at ±15 kV ensures signal integrity and component safety during handling.

Applications

• Personal Digital Assistants (PDAs) requiring low standby power
• Laptop and notebook computer serial ports
• Portable computing devices with mixed 3.3V and 5V systems

Procurement Notes

Verify the specific suffix against official Renesas documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status and moisture sensitivity level prior to assembly planning. Ensure the source document explicitly identifies the manufacturer as Renesas Electronics for this part number.

Selection Notes

Select this component for applications requiring a single-channel RS-232 interface with minimal quiescent current. Verify that the required data rate does not exceed 250 kb/s and that the operating environment remains within the commercial temperature range. Ensure the design accommodates the external capacitors necessary for the internal charge pump operation.

Part Context

This device belongs to the ICL3221E series of low-power RS-232 transceivers designed for portable electronics. The family shares common architectural features such as automatic shutdown and high ESD tolerance, tailored for battery-operated systems where power efficiency is critical compared to traditional 5V-only interfaces.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-reference with other members of the ICL32XXE family only if pinout and functional specifications match exactly.