ICL3243EIV-T

Overview

The ICL3243EIV-T is a full-duplex RS-232 transceiver manufactured by Renesas Electronics Corporation, housed in a 28-pin TSSOP surface-mount package. It operates on a supply voltage range of 3.0V to 5.5V and supports data rates up to 250kbps under worst-case load conditions. The device integrates three drivers and five receivers, featuring ±15kV ESD protection on all RS-232 pins per the Human Body Model. It includes manual and automatic powerdown functions that reduce standby current to 1µA. The component utilizes an internal charge pump requiring only four external 0.1µF capacitors.

Feature Summary

• Integrated automatic powerdown circuitry that detects peripheral status to minimize standby power consumption without hardware modifications.
• Robust electrostatic discharge protection rated at ±15kV on transmitter outputs and receiver inputs for enhanced reliability.
• On-chip voltage conversion eliminates the need for external dual-voltage supplies, relying solely on small-value external capacitors.

Applications

• Portable computing devices such as notebooks and laptops requiring low-power serial communication.
• Personal Digital Assistants (PDAs) and Palmtops with strict battery life constraints.
• Mixed voltage systems combining 3.3V logic with 5.0V RS-232 interfaces.

Procurement Notes

Verify the suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the 'IV' designation corresponds to the TSSOP-28 package variant. Ensure compatibility with RoHS3 standards if required by the target assembly process. Cross-reference the specific Renesas part number against distributor listings to confirm availability and lead times prior to procurement planning.

Selection Notes

Select this component for applications requiring drop-in replacement for MAX3243 or SP3243 devices. It is suitable for systems needing three transmit and five receive channels within a compact footprint. Consider the 250kbps speed limit and 3V-to-5.5V operating range during system design. Verify that the TSSOP-28 package dimensions fit the available PCB space constraints.

Part Context

This device belongs to the ICL32xxE series of low-power RS-232 transceivers designed for portable electronics. It serves as a direct pin-compatible upgrade to older 5V RS-232 components like the MAX221 or HIN232 families. The series emphasizes reduced power consumption while maintaining compliance with EIA/TIA-232 specifications at lower supply voltages.

Replacement Considerations

Publicly confirmed substitutes include the MAX3243EIDW and MAX3243EIDWR from Texas Instruments. These alternatives offer similar functionality and pinouts but may require verification of specific electrical characteristics against the original datasheet requirements.