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New High-Performance 2-Channel Digital Isolators from ST


The STISO620 offers high noise immunity with up to 100Mbit/s switching speed


STMicroelectronics have released the new STISO620, a dual-channel digital isolator based on the ST thick oxide galvanic isolation technology. The STISO620 offers high noise immunity with up to 100Mbit/s switching speed.

Click for Larger Image - New High-Performance 2-Channel Digital Isolators from ST The new STMicroelectronics STISO620 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 STMicroelectronics digital isolator range alongside the STISO621 and STISO621W that provide one channel in each direction. The digital isolator family thus offers a convenient 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 new 6kV thick-oxide technology that ensures robust galvanic isolation. Built to maintain insulation integrity during system faults and with aging, they enhance reliability in both industrial and consumer applications. They are suitable for use in 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, ensuring superior long-term performance.

With two Schmitt-trigger inputs, the STMicroelectronics STISO620 provides high noise immunity with up to 100Mbit/s switching speed and pulse distortion less than 3ns. Housed in a miniature SO8N narrow-body package with 4mm creepage and clearance, the STISO620 withstands 4000Vpeak impulse voltage (VIOTM) and has 2830Vrms isolation voltage (VISO) with 849Vrms maximum working isolation voltage (VIOWM). The isolation key parameters are tested in accordance with the international safety standards VDE0884-10 and UL 1577 and all the isolators are already UL 1577-certified.

Features of the STISO620 Dual Channel Digital Isolator include:

  • Dual channel digital isolator with 2 - 0 channel directionality
  • High data rate up to 100 Mbps
  • Wide Tamb range operation:- 40°C to 125°C
  • High common-mode transient immunity
  • From 3 V to 5.5 V supply levels
  • Low power consumption
  • Pulse width distortions < 3ns
  • Galvanic isolation

More information on the STISO620 Dual Channel Digital Isolator is available on the ST website at STMicroelectronics STISO620 product page.


The STMicroelectronics website address is www.st.com.
[Reprinted with kind permission from STMicroelectronics - Release Date, 16th January, 2022]