SI8645BB-ASR

Digital Isolators Overview

The SI8645BB-ASR is an automotive-grade, ultra-low power digital isolator from the Si864x series. It features four unidirectional channels with a data rate of 150 Mb/s and a propagation delay of 8 ns. The device provides 2500 Vrms insulation voltage using capacitive coupling technology. It operates on a supply voltage between 2.5 V and 5.5 V with a typical operating current of 6.1 mA. Packaged in a 16-SOIC (0.295" width), it supports a wide operating temperature range from -40°C to +125°C and holds AEC-Q100 qualification.

Digital Isolators Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for harsh environment operation
• Ultra-low power consumption design suitable for energy-efficient systems
• High common-mode transient immunity ensuring signal integrity in noisy environments

Digital Isolators Applications

• Automotive electronic control units requiring galvanic isolation
• Industrial automation systems needing robust signal transmission
• Power electronics interfaces for motor drives and inverters

Digital Isolators Procurement Notes

Verify the specific suffix ASR corresponds to the reel packaging configuration as indicated by distributor listings. Confirm that the AEC-Q100 qualification status meets your specific automotive application requirements. Ensure compatibility with the 16-SOIC footprint during PCB layout. Cross-reference the manufacturer part number with official Skyworks documentation to validate the exact electrical characteristics and thermal specifications before finalizing procurement.

Digital Isolators Selection Notes

Select this component when high channel count isolation is required within automotive constraints. The 150 Mb/s data rate supports standard communication protocols like CAN and LIN. Consider the 2500 Vrms isolation barrier for basic insulation needs. The SOIC-16 package offers a compact solution for space-constrained designs. Evaluate the 6.1 mA current draw against system power budgets compared to lower-channel alternatives.

Digital Isolators Part Context

This device belongs to the Si864x family of digital isolators, which utilizes Skyworks' proprietary iCoupler technology. The family includes variants with different isolation voltages and channel configurations. The SI8645BB variant specifically targets the 2500 Vrms market segment, distinguishing it from higher-voltage counterparts like the SI8645BT. It serves as a solid-state alternative to traditional magnetic isolators in modern electronic architectures.

Digital Isolators Replacement Considerations

SI8645BB-AS: Identical electrical specifications but packaged in tubes instead of reels. Suitable for manual assembly or wave soldering processes where reel feeding is not utilized. Verify tape-and-reel compatibility if transitioning to automated surface mount production lines.