ICL3221EIAZ-T

Overview

The ICL3221EIAZ-T is a single-driver, single-receiver RS-232 transceiver from the ICL32xxE series by Renesas Electronics. It operates on a single supply voltage ranging from 3V to 5.5V and meets EIA/TIA-232 and V.28/V.24 specifications at 3.0V. The device features an efficient on-chip charge pump requiring only four small external capacitors. It supports full-duplex communication with a guaranteed data rate of 250kbps under worst-case load conditions. Key electrical parameters include a maximum propagation delay of 0.15μs, a maximum high-level output current of 1.0mA, and a maximum low-level output current of 1.6mA. The component is housed in a 16-pin SSOP package.

Feature Summary

• Integrated automatic power-down function that reduces standby supply current to 1µA when the RS-232 cable is removed or peripheral is off.
• Provides ±15kV electrostatic discharge (ESD) protection on RS-232 pins according to IEC61000-4-2 standards.
• Utilizes internal charge pumps to generate required voltages, minimizing external component count and board space.

Applications

• Portable computers and notebook systems requiring low power consumption.
• Personal digital assistants (PDAs) and handheld devices.
• Battery-powered equipment utilizing mixed 3.3V and 5.0V logic levels.

Procurement Notes

Verify the suffix 'T' indicates reel packaging during acquisition. Confirm RoHS compliance status through official documentation. Ensure the SSOP-16 package matches the target PCB footprint. Validate the industrial temperature range requirements against specific application needs.

Selection Notes

Select this component for applications requiring a single driver and receiver with automatic shutdown capabilities. It serves as a direct replacement for older MAX221E designs while offering lower power consumption. Consider the 250kbps minimum data rate limit when designing for high-speed serial communications.

Part Context

This part belongs to the ICL32xxE family of 3V RS-232 transceivers. The series includes variants like ICL3222E and ICL3243E with different driver/receiver counts. The ICL3221E specifically targets single-port applications where power efficiency and ESD robustness are critical design constraints.

Replacement Considerations

Publicly confirmed substitutes include MAX3221E and MAX221E. Verify pin compatibility and electrical specifications before substitution. Ensure the alternative component supports the same 3V to 5.5V operating range and ESD protection levels.