ICL3221IAZ-T

Overview

The ICL3221IAZ-T is a CMOS RS-232 transceiver from the ICL32xxE series, manufactured by Renesas Electronics. It features one driver and one receiver in a 16-pin SSOP package. The device operates on a single power supply ranging from 3V to 5.5V. It supports data rates up to 250 kb/s with a maximum propagation delay of 0.15μs at specified load conditions. The component provides ±15kV ESD protection on both transmitter outputs and receiver inputs. It includes automatic shutdown functionality to reduce standby current when the cable is disconnected.

Feature Summary

• Automatic shutdown mode reduces power consumption when the RS-232 cable is disconnected
• Integrated charge pump enables operation from a single low-voltage supply
• High electrostatic discharge protection ensures robustness against environmental interference

Applications

• Portable computers and laptops requiring low-power serial communication
• Personal digital assistants (PDAs) and handheld devices
• Industrial control systems operating in harsh electromagnetic environments

Procurement Notes

Verify the suffix 'T' indicates reel packaging for automated assembly. Confirm the 'I' designation corresponds to the industrial temperature range specifications. Ensure compatibility with existing PCB footprints for SSOP-16 packages. Check for RoHS compliance documentation if required by local regulations. Validate that the manufacturer source matches Renesas or Intersil official records.

Selection Notes

Select this component for applications requiring full-duplex RS-232 communication with minimal power usage. It is suitable for systems transitioning from 5V to 3.3V logic levels without external level shifters. Consider the automatic shutdown feature for battery-operated devices where standby current is critical. Ensure the design accommodates the required external capacitors for the internal charge pump circuitry.

Part Context

This part belongs to the ICL32xxE family of RS-232 transceivers designed for low-voltage operation. The series maintains compatibility with standard RS-232 protocols while optimizing for modern portable electronics. The ICL3221 variant specifically offers a single driver and receiver configuration, making it ideal for simple point-to-point serial links.

Replacement Considerations

ICL3221EIAZ is the non-tape version of the same functional device. ICL3224IAZ-T offers two receivers but shares similar electrical characteristics. Verify pinout compatibility before substituting with other members of the ICL32xxE series.