ICL3243IA-T

Overview

The ICL3243IA-T is a low-power RS-232 transceiver manufactured by Renesas Electronics Corporation, designed for portable applications requiring minimal energy consumption. It operates within a supply voltage range of 3V to 5.5V and supports data rates up to 250kbps. The device integrates three drivers and five receivers in a single package, ensuring full duplex communication compliant with EIA/TIA-232 and V.28/V.24 standards. It features automatic powerdown functionality that reduces standby current to approximately 1µA. The component utilizes on-chip charge pumps requiring only four external 0.1µF capacitors. It is housed in a 28-pin SSOP package and is rated for an industrial operating temperature range of -40°C to +85°C.

Feature Summary

• Automatic powerdown mode significantly reduces standby current consumption for battery-operated devices.
• Integrated charge pump circuitry minimizes external component count by requiring only four small capacitors.
• Robust electrostatic discharge protection rated at 15kV according to the human body model.
• Full compatibility with 3.3V systems, mixed voltage environments, and traditional 5.0V logic levels.

Applications

• Personal Digital Assistants (PDAs) and Palmtops
• Notebook and laptop computers
• Portable handheld instruments

Procurement Notes

Verify the specific suffix 'IA-T' against official Renesas documentation to confirm the tape-and-reel packaging format and industrial temperature grade. Ensure the source document explicitly lists this part number as active or available, as distribution status varies by region. Cross-reference the manufacturer's ordering information to confirm RoHS compliance and lead times before finalizing procurement plans.

Selection Notes

Select the ICL3243IA-T when designing systems that require multiple transmit and receive channels within a compact footprint. This component is suitable for applications where low quiescent current is critical during idle periods. Verify that the system voltage remains within the 3V to 5.5V range and that the required data rate does not exceed 250kbps under worst-case load conditions.

Part Context

This component belongs to the ICL32XX family of RS-232 transceivers from Renesas Electronics. The family is engineered to provide drop-in replacements for legacy Maxim Integrated parts such as the MAX3243. The series emphasizes low power consumption and small physical size, making it a standard choice for modernizing older serial interface designs in portable electronics.

Replacement Considerations

The datasheet identifies the MAX3243 as a direct drop-in replacement competitor. Other compatible alternatives include the SP3243 and various Intersil variants within the same product line. Verify pinout compatibility and electrical specifications before substituting with these parts.