STMicroelectronics STISO620 high-speed digital isolators

Tuesday, 24 January, 2023 | Supplied by: STMicroelectronics Pty Ltd

STMicroelectronics STISO620 high-speed digital isolators

STMicroelectronics has extended its range of dual-channel high-speed digital isolators with the STISO620 high-speed digital isolator, designed to enhance flexibility for designers to optimise board layout.

The digital isolator contains two channels of the same directionality, having all digital inputs on one side of the isolation barrier and all digital outputs on the other side. It joins ST’s digital isolator line-up alongside the STISO621 and STISO621W that provide one channel in each direction. The range thus offers a solution for many applications that need to isolate two digital signals and transfer the digital communication across the isolation barrier with flexible directionality.

All the isolators are based on ST’s 6 kV thick-oxide technology that provides robust galvanic isolation. Built to maintain insulation integrity during system faults and with aging, they are designed to enhance reliability in industrial and consumer applications. These include smart-grid equipment, utility meters, motor drives, smart building and lighting systems, and domestic appliances, as well as power supplies, inverters, fieldbus isolators and battery monitors. They can be used anywhere to replace optocouplers, for long-term performance.

With two Schmitt-trigger inputs, the digital isolator provides high noise immunity with up to 100 Mbps switching speed and pulse distortion less than 3 ns. Housed in an SO8N narrow-body package with 4 mm creepage and clearance, the digital isolator withstands 4000 V peak impulse voltage (VIOTM) and has 2830 Vrms isolation voltage (VISO) with 849 Vrms maximum working isolation voltage (VIOWM). The isolation key parameters are tested in accordance with VDE0884-10 and UL 1577 safety standards and all the isolators are UL 1577-certified.

The STISO620, STISO621 and STISO621W in the SO8W wide-body package are in production now.

For more information: www.st.com/isolated-interfaces.

Online: www.st.com
Phone: 02 9158 7200
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