SI88442BC-ISR

Overview

The SI88442BC-ISR is a general-purpose digital isolator from Skyworks Solutions, featuring four unidirectional channels with an integrated DC-DC converter. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 100 Mb/s. The device provides 5000 Vrms isolation voltage and utilizes capacitive coupling technology. Key electrical specifications include a propagation delay of 18 ns, rise/fall times of 2.5 ns, and a common-mode transient immunity of 40 kV/µs. It functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-efficiency DC-DC converter for isolated power generation
• Provides robust capacitive coupling isolation for signal transmission
• Features high common-mode transient immunity for noise resilience

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reliable signal separation
• Power electronics interfaces such as motor drives

Procurement Notes

Verify the specific suffix against official Skyworks documentation to confirm pinout and functional compatibility. Ensure the procurement channel provides valid RoHS compliance certificates. Confirm that the reel packaging meets standard handling requirements for surface-mount assembly processes.

Selection Notes

Select this component when a single-channel DC-DC converter solution is required alongside four isolated digital channels. Compare performance metrics such as propagation delay and CMTI against alternative isolators. Ensure the SOIC-20 package dimensions fit the target PCB layout constraints.

Part Context

This part belongs to the Si8844x family of digital isolators designed for high-reliability applications. It combines signal isolation with power conversion in a compact form factor. The series is widely used in environments demanding strict safety standards and high noise immunity.

Replacement Considerations

Consult official Skyworks substitution guides for verified alternatives. Cross-reference pinouts and electrical characteristics before replacing. Generic equivalents may lack the integrated DC-DC converter or specific isolation ratings.