STISO621

Overview

The STISO621 is a dual-channel digital isolator based on STMicroelectronics thick oxide electrical isolation technology. It features two independent channels with Schmitt trigger inputs, ensuring high noise immunity and pulse distortion below 3 ns. The device supports data rates up to 100 Mbps and operates within a wide temperature range of -40 ºC to 125 ºC. It offers high common-mode transient immunity exceeding 50 kV/µs and functions with supply voltages from 3 V to 5.5 V. Key isolation ratings include a maximum repetitive isolation voltage (VIORM) of 1.5 kV peak, an impulse withstand voltage (VIOTM) of 5 kV peak, and a surge isolation voltage (VIOSM) of 6 kV peak.

Feature Summary

• Utilizes thick oxide electrical isolation technology for robust signal transmission between isolated domains
• Provides two independent channels with Schmitt trigger inputs to ensure high noise immunity
• Supports flexible logic configurations with 1-to-1 channel directionality
• Maintains low pulse distortion below 3 ns for accurate high-speed data integrity

Applications

• Power inverter systems requiring galvanic isolation
• Programmable Logic Controller (PLC) modules
• Isolated Analog-to-Digital Converter (ADC) frontends
• Industrial automation system isolation
• Battery monitoring equipment

Procurement Notes

Verify the specific package variant, as the STISO621 is available in both SO8 narrow and wide (SO8W) formats. Confirm regulatory certifications required for your region, such as UL 1577 or IEC 60747-17, as these depend on the package type. Ensure the selected component matches the required isolation voltage ratings for your specific application safety standards before ordering.

Selection Notes

Select the STISO621 when replacing conventional optical isolators to achieve higher reliability and longer lifetime. Choose this component for designs requiring high common-mode transient immunity and low power consumption. It is suitable for applications needing support for both 3.3 V and 5 V logic levels while maintaining strict size constraints in multi-channel isolation adapters.

Part Context

The STISO621 serves as the first release in STMicroelectronics' new series of high-performance digital isolators. It leverages proprietary thick oxide current isolation technology to outperform traditional optical isolators in data speed and durability. This component enables developers to integrate robust galvanic isolation into compact designs, facilitating faster time-to-market for industrial and energy applications.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation.