ICL3243ECVZA

Overview

The ICL3243ECVZA 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 500 kbps. The device operates on a single power supply ranging from 3 V to 5.5 V. It utilizes an internal charge pump architecture requiring only four external 0.1 µF capacitors for voltage conversion. The component is housed in a TSSOP-28 surface-mount package and is designed for industrial temperature ranges, functioning reliably between -40°C and +85°C.

Feature Summary

• Integrates manual and automatic powerdown features to minimize standby current consumption.
• Provides 15 kV electrostatic discharge (ESD) protection on all RS-232 lines according to the human body model.
• Features receiver hysteresis to enhance noise immunity during signal reception.
• Ensures compatibility with EIA/TIA-232 and V.28/V.24 specifications at low supply voltages.

Applications

• Portable computing devices such as PDAs and palmtops requiring low power interfaces.
• Industrial control systems operating in environments with significant electrical noise.
• Laptop and notebook computer serial communication ports.
• Battery-powered equipment utilizing mixed 3.3 V and 5.0 V logic levels.

Procurement Notes

Verify the specific suffix ECVZA against the manufacturer's official datasheet to confirm the exact package type, temperature grade, and RoHS compliance status. Ensure that the ordering documentation matches the required lead times and packaging quantities specified by Renesas Electronics Corporation for this particular variant.

Selection Notes

Select this component when designing circuits that require multiple transmit and receive channels within a compact footprint. It serves as a direct drop-in replacement for legacy MAX3243 devices while offering improved power efficiency. Confirm that the system environment stays within the specified -40°C to +85°C operational range and that the 3 V to 5.5 V supply rail is stable.

Part Context

This part belongs to the ICL32XX family of low-power RS-232 transceivers originally developed by Intersil and now produced by Renesas. The series is engineered for applications where board space and battery life are critical constraints. It maintains pin compatibility with older 5 V-only transceivers, facilitating easier upgrades in existing designs without major layout modifications.

Replacement Considerations

Publicly confirmed substitute part numbers include the MAX3243EIPWR from Texas Instruments and the ICL3243CBZ from Renesas Electronics Corporation. These alternatives offer similar functional characteristics but may differ in package dimensions or specific thermal ratings.