ICL3221EFVZ

Overview

The ICL3221EFVZ is a single driver, single receiver RS-232 transceiver from the Renesas ICL32xxE series. It operates on a single power supply ranging from 3.0V to 5.5V and meets EIA/TIA-232 and V.28/V.24 specifications at 3V. The device features ±15kV ESD protection on all RS-232 pins per IEC61000-4-2 standards. It includes an efficient on-chip charge pump requiring only four external 0.1µF capacitors. The component supports data rates greater than 250kbps under worst-case load conditions and offers manual and automatic power-down functions to minimize standby current.

Feature Summary

• Integrated on-chip voltage converters eliminate the need for external dual-voltage supplies.
• Automatic power-down circuitry reduces supply current when the RS-232 cable is disconnected.
• Receiver hysteresis provides improved noise immunity in electrically noisy environments.
• Robust electrostatic discharge protection ensures reliability during handling and operation.

Applications

• Battery-powered handheld devices and personal digital assistants
• Laptop computers and notebook systems
• Portable modems and printers
• Industrial equipment with serial communication ports

Procurement Notes

Verify the specific suffix 'FVZ' against official Renesas documentation to confirm package type and tape-and-reel configuration. Ensure compatibility with existing PCB footprints for the identified package style. Confirm RoHS compliance status for the specific manufacturing batch. Validate that the operating temperature range aligns with system requirements before finalizing procurement orders.

Selection Notes

Select this component for applications requiring low-power RS-232 connectivity in portable electronics. It serves as a drop-in replacement for legacy MAX3221E devices while offering enhanced power efficiency. Consider the automatic power-down feature for battery-operated systems to extend operational life. Verify that the required data rate does not exceed the guaranteed minimum of 250kbps under maximum load conditions.

Part Context

This part belongs to the ICL32xxE family of CMOS RS-232 transceivers designed for low-voltage operation. The series is engineered to replace older 5V-only interface chips with modern 3V-compatible alternatives. These devices are widely used in mobile computing and consumer electronics where board space and power consumption are critical design constraints.

Replacement Considerations

The ICL3221EFVZ is documented as a direct pin-compatible replacement for the Maxim MAX3221E. Designers upgrading from 5V RS-232 interfaces should verify that the target system supports the 3.0V to 5.5V supply range. Ensure that external capacitor values remain within specified limits to maintain signal integrity.