ICL3243ECAZ

Overview

The ICL3243ECAZ is a full-duplex RS-232 transceiver manufactured by Renesas Electronics Corporation. It integrates three drivers and five receivers within a single integrated circuit, supporting data rates up to 250 kbps. The device operates on a single power supply ranging from 3V to 5.5V. It utilizes an internal charge pump to generate the necessary voltages for RS-232 signaling without requiring external capacitors in some configurations, though specific designs may vary. The component is housed in a 28-pin SSOP package and is designed for surface mount installation. It complies with EIA/TIA-232-F standards and features enhanced electrostatic discharge protection capabilities.

Feature Summary

• Integrates three independent drivers and five independent receivers for comprehensive serial communication control.
• Features AUTO ON-LINE circuitry that automatically wakes the device from a low-power shutdown state upon signal detection.
• Provides enhanced ESD protection rated at +15kV Human Body Model and +15kV IEC1000-4-2 Air Discharge.
• Operates reliably from a single 3V to 5.5V power supply, making it suitable for portable applications.

Applications

• Portable computers and notebook systems requiring RS-232 connectivity.
• Hand-held devices and palmtop computers needing low-power serial interfaces.
• Industrial equipment utilizing RS-232 communication protocols.
• Embedded systems requiring robust ESD protection for serial ports.

Procurement Notes

Verify the exact suffix against the manufacturer's current datasheet to confirm pinout compatibility and electrical specifications. Ensure the procurement source provides valid RoHS compliance documentation as required by project regulations. Cross-reference the part number with official Renesas distributors to avoid counterfeit components. Confirm the package type matches the PCB footprint design requirements before ordering.

Selection Notes

Select this component when a full-duplex RS-232 interface with multiple transmit and receive lines is required. It is appropriate for designs operating between 3V and 5.5V where low quiescent current is beneficial. Consider the 28-SSOP package constraints regarding board space and thermal management. Verify that the required data rate does not exceed 250 kbps for optimal performance under load conditions specified in the datasheet.

Part Context

The ICL3243ECAZ belongs to the ICL3243 series of RS-232 transceivers from Renesas Electronics. This series is designed to replace older CMOS-based transceivers that required higher voltage supplies or larger external capacitors. The ECAZ suffix typically denotes a specific package variant and environmental compliance status within the broader product family. It serves as a direct functional replacement for similar legacy parts in existing designs.

Replacement Considerations

The MAX3243EIDW from Texas Instruments is a documented substitute offering similar functionality. Verify pin-to-pin compatibility and electrical parameter alignment before substitution. Check if the alternative part meets the same ESD protection and voltage supply requirements for the specific application environment.