ICL3232IBNZ-T

Overview

The ICL3232IBNZ-T is a dual transmitter and dual receiver RS-232 interface integrated circuit manufactured by Renesas Electronics. It operates on a single power supply ranging from +3V to +5.5V, ensuring compliance with EIA/TIA-232 and V.28/V.24 specifications even at the lower voltage limit of 3.0V. The device features an internal charge pump requiring only four external 0.1µF capacitors for operation. It supports data rates up to 250kbps and includes ±15kV ESD protection on all pins. The component is housed in a 16-pin SOIC package and is designed for low-power applications, offering a standby current of 1µA.

Feature Summary

• Integrated charge pump eliminates the need for external inductors or multiple voltage supplies
• Provides robust ±15kV electrostatic discharge protection across all signal pins
• Features automatic power-down mode triggered by cable removal or peripheral shutdown
• Includes receiver hysteresis to enhance noise immunity in serial communication

Applications

• Battery-powered portable devices such as PDAs and laptops
• Modems, printers, and other computer peripheral interfaces
• Digital cameras and cellular/mobile phones requiring serial connectivity
• Systems operating in mixed 3.3V and 5.0V voltage environments

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm the manufacturer designation aligns with Renesas Electronics or its predecessor Intersil, as part numbers may carry legacy branding. Ensure the order matches the exact 16-pin SOIC variant required for the target PCB footprint. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Selection Notes

Select this component for designs requiring a drop-in replacement for older ICL232 series devices with improved power efficiency. It is suitable for systems needing full RS-232 compliance at 3V logic levels without additional voltage generation circuits. Consider the 250kbps speed limit when evaluating high-speed serial requirements. Verify that the available 0.1µF capacitor space fits within the board layout constraints.

Part Context

This part belongs to the ICL3232E family of RS-232 transceivers, which are widely used in legacy and modern embedded systems. The 'IBNZ' suffix typically denotes the industrial temperature range (-40°C to +85°C) and SOIC-16 package. The '-T' suffix specifically identifies the reel packaging format for automated assembly processes.

Replacement Considerations

Publicly confirmed substitutes include the ICL3232CBNZ and ICL3232ECAZ. These variants share functional compatibility but may differ in package type (e.g., TSSOP vs. SOIC) or specific suffix designations. Verify pin-to-pin compatibility before substitution.