ICL3221ECA

Overview

The ICL3221ECA is a single driver, single receiver RS-232 transceiver manufactured by Intersil (Renesas). 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 single-ended receiver signal types. It includes automatic powerdown functionality and provides 15 kV ESD protection on RS-232 pins. The component is housed in a 16-pin SSOP package and operates at a typical quiescent current of 1 mA across a commercial temperature range of 0°C to +70°C.

Feature Summary

• Integrated automatic powerdown circuit reduces standby current when no valid RS-232 signals are detected.
• Provides robust electrostatic discharge protection rated at 15 kV for RS-232 input/output pins.
• Capable of meeting EIA/TIA-232 specifications while operating at low supply voltages down to 3 V.

Applications

• Portable computing devices such as PDAs and palmtops requiring low power consumption.
• ISDN terminal adaptors and peripheral interfaces.
• Notebook and laptop computer serial communication ports.

Procurement Notes

Verify the specific suffix against official Renesas documentation to confirm packaging type and temperature grade. The base part number denotes the standard commercial variant. Confirm moisture sensitivity levels and RoHS compliance status directly from the manufacturer's datasheet before procurement.

Selection Notes

Select this component for applications requiring a single channel of RS-232 communication with minimal board space. Ensure the design accommodates the required external capacitors for the internal charge pumps. Verify that the 250 kb/s data rate meets system requirements and that the 16-pin SSOP footprint fits the PCB layout constraints.

Part Context

This device belongs to the ICL32XXE family of low-power RS-232 transceivers designed for 3V to 5.5V systems. It serves as a direct replacement for legacy 5V-only transceivers in modern low-voltage environments. The ICL3221 specifically offers one driver and one receiver, distinguishing it from higher-channel variants like the ICL3223 or ICL3232.

Replacement Considerations

Publicly confirmed substitutes include the MAX202E and HIN202E. These components share similar electrical characteristics and pinouts but require verification of exact package dimensions and voltage tolerances against the original design specifications.