ICL3222ECAZ-T

Overview

The ICL3222ECAZ-T is a CMOS RS-232 transceiver from the ICL32xxE series, manufactured by Renesas Electronics. It operates on a single power supply ranging from 3V to 5.5V and supports data rates up to 250kbps. The device integrates two drivers and two receivers in a full-duplex configuration. It utilizes small external capacitors via efficient on-chip charge pumps. Key electrical parameters include a maximum high-level output current of 1.0mA and a maximum low-level output current of 1.6mA. Propagation delay is specified at 0.15μs under load conditions. The component functions within an operating temperature range of -40°C to +85°C and is housed in a 20-pin SSOP package.

Feature Summary

• Integrates automatic power-down functionality to reduce standby current when the cable is disconnected or peripheral is off
• Provides 15kV electrostatic discharge (ESD) protection on all RS-232 lines for enhanced robustness
• Features efficient on-chip charge pumps requiring only small external capacitors to minimize board space

Applications

• Portable devices such as PDAs and notebook computers requiring low power consumption
• Mixed voltage systems combining 3.3V and 5.0V logic levels
• Industrial equipment requiring ESD protection and reliable serial communication

Procurement Notes

Verify the specific suffix 'ECAZ-T' against official Renesas documentation to confirm the exact tape-and-reel packaging and temperature grade. Ensure compatibility with existing PCB footprints for the SSOP-20 package. Confirm that the automatic power-down feature aligns with system power management requirements before finalizing procurement orders.

Selection Notes

Select this component when a dual-driver RS-232 interface is required for 3V to 5.5V systems. It is suitable for applications needing automatic power-down capabilities to conserve energy during idle states. Compare against the ICL3221 if only one driver is needed, or the ICL3232 if three drivers are required without auto-power-down features.

Part Context

This part belongs to the ICL32xxE family of low-power RS-232 transceivers originally developed by Intersil and now produced by Renesas. The family is designed to replace legacy TTL-based interfaces in modern low-voltage environments. The ICL3222 specifically addresses the need for bidirectional communication in compact form factors common in portable electronics.

Replacement Considerations

Publicly confirmed substitutes include the ISL3222ECAZ-T and the ICL3222EIAZ-T. Verify pinout compatibility and electrical specifications before substitution. Other family members like the ICL3221 or ICL3232 may serve as alternatives depending on driver count requirements.