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Digital Isolator Boosts Performance and Reliability

28.05. 2021 | News
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STMicroelectronics has begun volume production of the STISO621 dual-channel digital isolator, launching a new series of high-performance ICs for industrial applications and general optocoupler replacement.

The STISO621 transfers data between two isolated domains at up to 100Mbit/s, with pulse distortion below 3ns, leveraging ST’s 6kV thick-oxide galvanic-isolation technology. With two independent unidirectional channels, the device performs as a UART interface handling data in both directions. Schmitt-trigger inputs to each channel ensure high noise immunity.

The supply voltages to the two mutually galvanically isolated sides of the STISO621 are independent of each other. Each has a wide voltage range, allowing level translation between 3.3V and 5.5V circuitry. Typical common-mode transient immunity (CMTI) of 65kV/µs protects the low-voltage side against high switching transients in harsh environments (more info).

stiso621