ICL3232ECB-T

Overview

The ICL3232ECB-T is a dual transmitter and dual receiver RS-232 interface integrated circuit manufactured by Renesas Electronics Corporation. It operates within a single power supply voltage range of +3.0V to +5.5V, ensuring compliance with EIA/TIA-232 and V.28/V.24 specifications even at the lower voltage limit. The device features an internal charge pump requiring only four external 0.1µF capacitors for operation. Key electrical parameters include a maximum data rate of 250kbps, a typical slew rate of 6V/µs, and a low standby supply current of 1µA. It provides ±15kV electrostatic discharge (ESD) protection on all RS-232 lines.

Feature Summary

• Integrated charge pump eliminates the need for external inductors or multiple voltage supplies.
• Automatic power-down mode significantly reduces system power consumption when no valid RS-232 signals are present.
• Receiver input hysteresis improves noise immunity in electrically noisy environments.
• Robust ±15kV ESD protection ensures reliability during handling and operation.

Applications

• Portable battery-powered devices such as PDAs and handheld terminals
• Laptop computers and notebook systems requiring serial port expansion
• Modems, printers, and other peripheral equipment connecting via RS-232
• Industrial control systems utilizing serial communication protocols

Procurement Notes

Verify the specific suffix 'CB' indicates the TSSOP-16 package variant distinct from SOIC packages. Confirm the 'T' suffix denotes tape-and-reel packaging suitable for automated assembly processes. Ensure the component meets RoHS compliance requirements for your manufacturing standards. Cross-reference the manufacturer date code to ensure freshness and prevent moisture sensitivity issues prior to soldering.

Selection Notes

Select this component when designing systems that require dual-channel RS-232 communication with minimal external component count. It is suitable for applications where low standby power is critical, such as battery-operated equipment. Consider the TSSOP-16 package if board space is limited compared to standard SOIC options. Verify that the 250kbps data rate meets the throughput requirements of the target serial interface application.

Part Context

This part belongs to the ICL3232E family of RS-232 transceivers, which are designed as low-power upgrades to legacy drivers like the HIN232. The family shares functional compatibility while offering improved power efficiency and robust ESD protection. The ICL3232ECB-T specifically utilizes the CB package designation, differentiating it from other pin-compatible variants like the ICL3232IBNZ or ICL3232CVZ.

Replacement Considerations

The ICL3232IBNZ serves as a direct pin-compatible alternative within the same product family. Other compatible devices include the ICL3232CVZ and ICL3232EIV. When substituting, verify that the replacement package matches the PCB footprint and that the operating temperature range aligns with the system design constraints.