SI8451BA-B-IS1

Overview

The SI8451BA-B-IS1 is a Skyworks Solutions digital isolator featuring five channels with unidirectional signal flow. It utilizes capacitive coupling technology to provide electrical isolation rated at 1000 Vrms. The device supports data rates up to 150 Mb/s and includes a shutdown function for power management. It operates within a supply voltage range of 2.7 V to 5.5 V and functions across an industrial temperature range from -40°C to +125°C. Packaged in a SOIC-Narrow-16 surface-mount format, it offers a propagation delay of 6 ns.

Feature Summary

• Provides galvanic isolation via capacitive coupling technology
• Integrates a shutdown pin for active power control
• Supports high-speed digital signal transmission

Applications

• Industrial automation systems requiring signal isolation
• Power electronics monitoring circuits
• General-purpose digital communication interfaces

Procurement Notes

Verify the component status as Not Recommended for New Designs (NRND) before integration into new products. Confirm package details and lead times directly with authorized distributors or the manufacturer. Ensure compliance with RoHS requirements and moisture sensitivity levels during storage and handling procedures.

Selection Notes

Select this component when a five-channel unidirectional isolator with 1 kV rating is required. Compare against other SI84xx series variants if bidirectional channels or higher insulation voltages are needed. Verify that the SOIC-Narrow-16 footprint matches the target PCB layout constraints.

Part Context

This part belongs to the SI845x family of digital isolators from Skyworks Solutions. These devices are designed to replace traditional optocouplers in modern applications, offering superior performance characteristics including lower power consumption and tighter timing specifications while maintaining robust isolation capabilities.

Replacement Considerations

Check for direct substitutes within the SI845x series such as SI8450BA or SI8452BA depending on channel configuration needs. Verify functional equivalence regarding insulation voltage and data rate before swapping components in existing designs.