SI8645BT-ASR

Digital Isolators Overview

The SI8645BT-ASR is a quad-channel digital isolator from the Si864x series, manufactured by Skyworks Solutions. It utilizes capacitive coupling technology to provide electrical isolation with a rated insulation voltage of 5000 Vrms. The device supports unidirectional signal transmission at data rates up to 150 Mb/s. It operates within a supply voltage range of 2.5 V to 5.5 V and draws a typical operating current of 6.1 mA. Key timing parameters include an 8 ns propagation delay, 4 ns rise/fall times, and 0.2 ns pulse width distortion. It is housed in a 16-SOIC package and is qualified under AEC-Q100 standards for automotive applications.

Digital Isolators Feature Summary

• Provides high-voltage galvanic isolation via capacitive coupling technology
• Supports high-speed digital signal transmission up to 150 Mb/s
• Qualified for automotive reliability standards (AEC-Q100)
• Operates across an extended industrial temperature range

Digital Isolators Applications

• Automotive electronic control units requiring isolated communication
• Industrial automation systems with high noise immunity needs
• Power electronics interfaces for motor drives and inverters

Digital Isolators Procurement Notes

Verify the specific suffix 'ASR' corresponds to the required tape-and-reel packaging configuration, as other suffixes may indicate tube packaging. Confirm that the AEC-Q100 qualification status meets your specific automotive grade requirements. Ensure the SOIC-16 footprint matches your PCB layout constraints. Cross-reference the datasheet revision date to ensure compatibility with your design specifications.

Digital Isolators Selection Notes

Select this component when four independent unidirectional channels are required within a single package. Consider the 5000 Vrms isolation rating for safety-critical applications. Evaluate the 6.1 mA power consumption against system energy budgets. Verify that the 150 Mb/s data rate suffices for the target communication protocol. Check if the 16-SOIC package is suitable for the available assembly space.

Digital Isolators Part Context

This part belongs to the Si864x family of digital isolators, which are designed for general-purpose isolation tasks. The family shares common architectural features such as capacitive sensing and low-power operation. The SI8645 variant specifically offers four forward channels with no reverse channels, distinguishing it from bidirectional or mixed-direction counterparts in the same series.

Digital Isolators Replacement Considerations

SI8645BD-B-IS is a documented alternative within the same product line offering similar isolation characteristics.