high-speed digital isolator

STISO621 - Robust, dual-channel, high-speed digital isolator

stiso621 digital isolator

Featuring two independent channels in opposite direction with Schmitt trigger inputs, the STISO621 provides low levels of pulse width distortion in the full operation range

Offering high-speed input/output switching times and robustness to noise, the STISO621 ensures faster data transmission, longer lifetime, and higher reliability than conventional optical isolators.

Key features of STISO621

  • Dual-channel, digital isolator with 1 – 1 channel directionality
  • High data rates up to 100 Mbps
  • Wide operating temperature range: - 40 to 125ºC
  • High common-mode transient immunity: >50k V/µs
  • From 3 V to 5.5 V supply levels
  • 3.3 V and 5 V level translation
  • Low power consumption
  • Pulse width distortions < 3 ns
  • 6k V Galvanic isolation
  • SO8 narrow and wide package options

Application examples

interface Optocoupler replacement in industrial application
plc Industrial field bus isolation
battery charging Battery monitor
motor drive Motor drive

And more applications, such as:

  • Size-critical multichannel isolation
  • Electricity metering
  • Factory automation
  • Inverter
  • and many more

How to test & prototype with STISO621

Choose a development kit to start testing the capabilities and features of STISO621:


To help developers get their design to market more quickly, the STISO621 evaluation board (EVALSTISO62XV1) allows a complete evaluation of STISO dual-channel digital isolators featuring high-speed communication and reduced distortion at high speeds.

A complete three-phase energy meter with low-cost shunt current sensors. Ready-to-use firmware implements a virtual com port communication to easily access the internal parameters to read metrology data, to modify the internal configuration for a high flexibility of the application, and to calibrate the board.