ICL3232CBN

Overview

The ICL3232CBN is a triple line transceiver manufactured by Intersil, designed for RS-232 communication interfaces. It operates within a supply voltage range of 3.0V to 5.5V and meets EIA/TIA-232, V.28, and V.24 specifications even at the lower voltage limit. The device integrates three drivers and five receivers, featuring an on-chip charge pump that requires only four external 0.1µF capacitors. It guarantees a minimum data rate of 250kbps and includes receiver hysteresis for noise immunity. The component is housed in a 28-pin SSOP package with an operating temperature range from 0°C to 70°C.

Feature Summary

• Integrates three drivers and five receivers for complete serial port functionality
• On-chip voltage converter eliminates need for external power supplies
• Automatic powerdown feature reduces standby current significantly
• Receiver hysteresis enhances noise immunity in noisy environments

Applications

• Battery-powered handheld and portable devices
• Laptops and notebook computers
• Modems and printers
• Digital cameras and cellular phones

Procurement Notes

Verify the specific suffix against official Intersil documentation to confirm package type and temperature grade. Ensure the ordering part number matches the required RoHS compliance status. Cross-reference the manufacturer's active status to confirm availability. Confirm pinout compatibility if replacing legacy components. Validate capacitor requirements for the charge pump circuit during integration.

Selection Notes

Select this component when a full RS-232 interface with multiple receive lines is required in a compact form factor. It is suitable for systems needing low standby power due to its automatic powerdown capability. Consider the 28-pin SSOP package constraints for PCB layout. Verify that the 250kbps data rate meets system timing requirements. Ensure the 3V to 5.5V supply range aligns with the target platform's power architecture.

Part Context

This device belongs to the ICL3232 series of low-power RS-232 transceivers produced by Intersil, now part of Renesas Electronics. The series is engineered for portable electronics where power efficiency and board space are critical. It serves as a drop-in replacement for older RS-232 drivers while offering improved power management features like automatic shutdown.

Replacement Considerations

Public confirmed substitute part numbers: ICL3232CBNZ.