SI88621BC-ASR

Overview

The SI88621BC-ASR is a digital isolator from the Si88621 series, manufactured by Skyworks Solutions. It features two channels with unidirectional polarity and utilizes capacitive coupling for isolation. The device supports a data rate of 100 Mb/s and offers an insulation voltage of 3750 Vrms. Operating on a supply voltage between 3 V and 5.5 V, it draws 8 mA of working power current. Key timing parameters include an 18 ns propagation delay, 2.5 ns rise/fall times, and 4.5 ns pulse width distortion. It operates within a temperature range of -40°C to +125°C and is housed in an SOIC-20 package.

Feature Summary

• Integrates a DC-DC converter for isolated power delivery
• Provides high-voltage electrical isolation via capacitive coupling
• Supports high-speed digital signal transmission at 100 Mb/s

Applications

• Automotive electronic control units
• Industrial communication interfaces
• Power monitoring systems

Procurement Notes

Verify the specific suffix ASR against official Skyworks documentation to confirm packaging type and moisture sensitivity level. Ensure compatibility with AEC-Q100 automotive qualification requirements if applicable to the target design. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and traceability before procurement.

Selection Notes

Select this component when bidirectional isolation is not required due to its unidirectional channel configuration. Consider the integrated DC-DC converter capability to simplify board layout by eliminating external isolated power supplies. Evaluate the 3750 Vrms insulation rating against system safety standards and ensure the SOIC-20 footprint fits the mechanical constraints.

Part Context

This part belongs to the Si88621 family of digital isolators, which combines signal isolation with integrated power conversion. The family is designed for applications requiring robust galvanic isolation in noisy environments. The BC variant typically denotes specific insulation and reliability characteristics defined by the manufacturer for industrial and automotive sectors.

Replacement Considerations

Check Skyworks datasheets for direct pin-compatible alternatives within the Si8862x series. Verify that any substitute maintains the same 3750 Vrms insulation rating and 100 Mb/s data rate. Confirm that the replacement part supports the required SOIC-20 package and operating temperature range.