ICL3232IA

Overview

The ICL3232IA is a triple line transceiver manufactured by Renesas Electronics Corporation, formerly Intersil. It operates within a supply voltage range of 3.0V to 5.5V and complies with EIA/TIA-232, V.24, and V.28 specifications. The device features three drivers and five receivers in a single package. It utilizes Schmitt trigger inputs for enhanced noise immunity. The component is housed in a 28-terminal plastic dual small-outline package (PDSO28) or SSOP variant. It supports data rates up to 250kbps and includes an automatic power-down mode that reduces supply current to approximately 1µA.

Feature Summary

• Triple driver and receiver configuration for complete serial port implementation
• Automatic power-down mode significantly reduces standby power consumption
• Schmitt trigger receiver inputs provide improved noise rejection capabilities

Applications

• Portable computers and notebook systems requiring full RS-232 ports
• Battery-powered handheld devices where low power consumption is critical
• Industrial automation equipment utilizing serial communication interfaces

Procurement Notes

Verify the specific suffix against official Renesas documentation to confirm package type and temperature grade. Ensure the ordering information matches the required pinout and electrical characteristics. Confirm RoHS compliance status through the manufacturer's latest product change notices. Cross-reference the part number with authorized distributors to validate authenticity and traceability.

Selection Notes

Select this component when a design requires three independent transmit channels and five receive channels in a compact form factor. It is suitable for applications needing RS-232 compatibility at lower supply voltages compared to older generations. Consider the automatic shutdown feature for battery-operated systems to extend operational life. Verify that the 28-pin package fits the available PCB real estate constraints.

Part Context

This device belongs to the ICL3232 family of RS-232 transceivers designed for portable electronics. It serves as a successor to earlier single-supply RS-232 solutions, offering higher integration and lower power usage. The series is widely used in legacy system upgrades and new designs requiring robust serial communication interfaces without external high-voltage supplies.

Replacement Considerations

Check for direct pin-compatible alternatives such as the MAX3232E series from Maxim Integrated. Verify functional equivalence regarding driver count and voltage levels before substitution. Ensure thermal performance and package dimensions match the existing footprint requirements.