SI8451BB-B-IS1

Overview

The SI8451BB-B-IS1 is a general-purpose digital isolator manufactured by Skyworks Solutions, Inc. It features five channels with four unidirectional forward paths and one reverse path. The device operates within a supply voltage range of 2.7 V to 5.5 V and supports data rates up to 150 Mb/s. It provides an insulation voltage of 2500 Vrms and utilizes capacitive coupling technology. Key electrical specifications include a propagation delay of 35 ns, a typical common-mode transient immunity (CMTI) of 25 kV/µs, and a pulse width distortion of 25 ns. The component is housed in a 16-pin SOIC-Narrow package and functions across an operating temperature range of -40°C to +125°C.

Feature Summary

• Provides galvanic isolation via capacitive coupling technology for signal integrity
• Integrates five independent channels with mixed directional configurations
• Includes a shutdown pin for power management control
• Supports high-speed data transmission up to 150 Mb/s

Applications

• Industrial automation systems requiring isolated communication
• Medical equipment needing safety-certified signal isolation
• Power electronics interfaces for gate drive signals
• General-purpose digital isolation in noisy environments

Procurement Notes

Verify the specific suffix IS1 corresponds to the required tube packaging configuration. Confirm that the NRND status does not impact existing production schedules. Ensure compatibility with the target PCB footprint for the 16-SOIC narrow package. Validate that the 2500 Vrms insulation rating meets the safety requirements of the end application. Check for moisture sensitivity levels if storage conditions are a concern.

Selection Notes

Select this component when a mix of forward and reverse isolation directions is required within a single package. The 150 Mb/s data rate suits applications needing moderate speed without the complexity of higher-performance isolators. The wide operating temperature range makes it suitable for harsh industrial environments. Consider the 2500 Vrms isolation barrier as sufficient for many low-voltage industrial standards.

Part Context

This part belongs to the SI8451 family of digital isolators from Skyworks Solutions. It shares the same physical package and basic architecture as other variants in the series but differs in channel directionality and speed ratings. The SI8451 series is designed to replace traditional transformer-based isolators in space-constrained designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.