ICL3221ECAZA

Overview

The ICL3221ECAZA is a single driver and receiver RS-232 transceiver from the Renesas ICL32xxE series, manufactured using CMOS technology. It operates within a supply voltage range of 3V to 5.5V and supports full-duplex communication with a guaranteed data rate of 250 kb/s. The device features ±15 kV ESD protection on RS-232 pins per IEC61000-4-2 standards and includes an automatic power-down mode that reduces standby current to 1 µA. Packaged in a 16-pin SSOP (MO-150AC) with a 0.65 mm pitch, it complies with EIA/TIA-232, V.28/V.24, and RoHS directives.

Feature Summary

• Integrated automatic power-down circuitry for ultra-low standby current consumption
• Robust electrostatic discharge protection rated at ±15 kV on all RS-232 I/O lines
• Direct compatibility with 3.3V and 5.0V logic systems without external level shifting

Applications

• Portable computing devices such as laptops and notebooks requiring low power interfaces
• Personal digital assistants (PDAs) and handheld computers with battery constraints
• Industrial control systems utilizing serial communication protocols

Procurement Notes

Verify the specific suffix 'ZA' against official Renesas documentation to confirm package variant and compliance status. Distributor listings may reference similar part numbers like ICL3221ECAZ or ICL3221EIAZ-T; ensure the exact ordering code matches the required commercial temperature range and packaging format before procurement.

Selection Notes

Select this component for applications requiring a single channel of RS-232 communication with minimal quiescent current. It serves as a direct pin-compatible replacement for legacy MAX221E devices while offering improved power efficiency. Ensure the design accommodates the external charge pump capacitors required for voltage generation within the specified operating temperature range.

Part Context

This part belongs to the ICL32xxE family of low-power RS-232 transceivers designed for portable electronics. The series distinguishes itself by maintaining EIA/TIA-232 compliance at voltages as low as 3.0V. The ICL3221 variant specifically provides one driver and one receiver, making it suitable for simple half-duplex or full-duplex point-to-point links where space and power are critical constraints.

Replacement Considerations

Publicly confirmed pin-compatible substitutes include the MAX221E and MAX3221E. Verify that alternative sources support the same 3V-5.5V operating range and ESD protection levels to ensure functional equivalence in existing designs.