SI8451BA-B-IS1R

Overview

The SI8451BA-B-IS1R is a five-channel digital isolator from Skyworks Solutions, utilizing capacitive coupling technology. It operates within a supply voltage range of 2.7 V to 5.5 V and provides an insulation voltage of 1000 Vrms. The device features four unidirectional forward channels and one reverse channel, supporting data rates up to 150 Mb/s with a propagation delay of 6 ns. It functions between -40°C and +125°C in a 16-pin SOIC-Narrow package.

Feature Summary

• Integrates four forward and one reverse channel for versatile signal isolation
• Employs high-reliability capacitive coupling for galvanic isolation
• Includes a shutdown pin for power management control

Applications

• Industrial automation systems requiring multi-channel isolation
• Medical equipment signal processing interfaces
• Power electronics gate drive circuits

Procurement Notes

Verify the component status as NRND (Not Recommended for New Designs) before procurement. Confirm that the specific suffix matches the required packaging and lead time constraints. Ensure compatibility with existing board layouts due to the fixed SOIC-Narrow-16 footprint. Review current availability through authorized distributors as production may be limited.

Selection Notes

Select this component when five isolated channels are required with mixed forward and reverse directionality. The 1 kV rating suits applications with moderate isolation requirements. Consider the 150 Mb/s speed for general-purpose digital communication. Evaluate the shutdown feature if power efficiency during idle states is critical for the system design.

Part Context

This part belongs to the SI84xx series of digital isolators. It shares the SOIC-Narrow-16 package and capacitive coupling architecture with other models in the family. It differs from variants like the SI8451BB by its lower 1 kV insulation rating compared to the 2.5 kV version.

Replacement Considerations

• SI8451BB-B-IS1R

FAQ

What is the channel configuration of the SI8451BA?

It consists of four forward channels and one reverse channel.

Does the SI8451BA support bidirectional communication?

No, it supports unidirectional polarity with one dedicated reverse channel.