ICL3232CBZ

Overview

The ICL3232CBZ is a low-power RS-232 transceiver manufactured by Renesas Electronics Corporation, housed in a 28-SOIC surface-mount package. It operates on a single supply voltage ranging from 3V to 5.5V and supports data rates up to 250kbps. The device integrates three drivers and five receivers, complying with EIA/TIA-232 and V.28/V.24 specifications even at the minimum 3.0V supply level. Key electrical parameters include a receiver hysteresis of 300 mV for noise immunity and a standby supply current reduced to 1µA via automatic power-down functionality.

Feature Summary

• Integrates an efficient on-chip charge pump requiring only four external 0.1µF capacitors
• Features automatic power-down mode that activates when peripherals are off or cables are disconnected
• Includes noninverting always-active receivers to support system wake-up capabilities
• Provides 15kV ESD protection per the human body model standard

Applications

• Battery-powered handheld and portable devices
• Notebook and laptop computers
• Modems and peripheral equipment
• Digital cameras and cellular mobile phones

Procurement Notes

Verify the specific suffix 'CBZ' against the manufacturer's official datasheet to confirm the exact package type and temperature range. Ensure compatibility with RoHS3 standards and check moisture sensitivity level 3 handling requirements during assembly. Confirm lead-free status and verify that the ordering information matches the intended application environment before finalizing procurement.

Selection Notes

Select this component for designs requiring a complete serial port interface in space-constrained environments. It is suitable for mixed 3.3V and 5.0V systems as well as pure 3.3V applications. Consider the automatic power-down feature for battery-operated devices where minimizing standby current is critical. Verify that the required number of drivers and receivers aligns with the system architecture.

Part Context

This device belongs to the ICL32xx series of low-power RS-232 transmitters and receivers. The family includes variants such as the ICL3221, ICL3222, ICL3223, ICL3241, and ICL3243. These components share common characteristics like low standby current and small footprint packaging, designed primarily for portable electronics and systems requiring efficient power management.

Replacement Considerations

The MAX3243EIDW from Texas Instruments is listed as an upgrade substitute. Verify pinout compatibility and electrical parameter alignment before replacement.