ISL6446IAZ-TK

Overview

The ISL6446IAZ-TK is a dual-channel, high-speed RS-422/RS-485 transceiver manufactured by Renesas Electronics Corporation. It operates from a single 3.3V supply and supports data rates up to 10 Mbps. The device features fail-safe circuitry that ensures a high logic state at the receiver output when inputs are open or disconnected. It includes thermal shutdown protection and is housed in an 8-pin SOIC package.

Feature Summary

• Supports RS-422 and RS-485 communication standards with differential transmission capabilities
• Integrated fail-safe mechanism maintains a known high state at receiver outputs during idle conditions
• Includes thermal shutdown protection to prevent damage during excessive power dissipation

Applications

• Industrial automation control systems requiring robust serial communication
• Building automation networks utilizing RS-485 bus topologies
• Metering equipment needing reliable half-duplex data transfer

Procurement Notes

Verify the specific suffix 'TK' indicates tape and reel packaging configuration as per manufacturer documentation. Confirm voltage supply requirements match system design specifications before integration. Ensure ESD handling procedures are followed during assembly due to CMOS input sensitivity.

Selection Notes

Select this component for applications requiring dual-channel bidirectional data transfer over twisted pair lines. Consider its 3.3V operation for low-power embedded systems. Evaluate thermal performance if operating near maximum data rates in enclosed environments.

Part Context

This part belongs to the ISL64xx series of RS-422/RS-485 transceivers designed for industrial environments. It provides balanced differential signaling for noise immunity. The series typically offers compatibility with standard protocol controllers and supports multi-drop configurations on shared buses.

Replacement Considerations

Check for direct pin-compatible alternatives within the same product family. Verify electrical characteristics such as slew rate and common-mode range match original design constraints. Confirm package dimensions remain compatible with existing PCB footprints.