The STMicroelectronics STISO620TR is a dual-channel digital isolator using magnetic coupling to pass digital signals across a galvanic isolation barrier. Its headline rating is 4000Vrms of isolation voltage, which qualifies it for reinforced insulation in many industrial and medical applications where the safety standard demands a 3 kVRMS or higher barrier. The 100 Mbps data rate is fast enough for SPI clock lines, UART links, and general-purpose digital isolation without adding timing margin headaches — propagation delay is 42 ns max, and pulse-width distortion stays under 3 ns. The 2/0 input configuration (both channels drive from side 1) means this part is unidirectional: data flows from side 1 to side 2 only.
Unidirectional channels — design-in check
Because both channels are unidirectional with inputs on side 1 only, the STISO620TR cannot handle bidirectional data on a single channel. If your application needs a bidirectional isolation path (e.g., half-duplex RS-485 or I²C), you will need two isolators or a part with configurable direction. For unidirectional signals like SPI (MOSI, SCLK, CS) or isolated UART TX, this part is a clean fit.
The ROHS3 compliance is current, so no conflict with EU or California regulatory requirements.