SI8640ET-ASR

Digital Isolators Overview

The SI8640ET-ASR is a Skyworks Solutions automotive-grade digital isolator featuring four unidirectional channels with capacitive coupling technology. It provides 5000 Vrms isolation voltage and supports data rates up to 150 Mb/s. The device operates within a supply voltage range of 2.375 V to 5.5 V, consuming typical current of 6.1 mA per channel. Key electrical parameters include an 8 ns propagation delay, 4 ns rise/fall times, and 0.2 ns pulse width distortion. It is qualified under AEC-Q100 standards and functions reliably across an extended temperature range from -40°C to +125°C.

Digital Isolators Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliable operation in vehicle environments
• High common-mode transient immunity of 35 kV/µs ensures signal integrity in noisy industrial settings
• Capacitive coupling architecture enables robust galvanic isolation without magnetic core saturation risks
• Integrated isolated power capability allows flexible system design by powering secondary side circuits

Digital Isolators Applications

• Automotive battery management systems requiring high-voltage isolation
• On-board charger interfaces for electric vehicles
• Industrial motor control drives with high noise immunity needs
• Medical equipment requiring reinforced safety isolation

Digital Isolators Procurement Notes

Verify the specific suffix ASR indicates reel packaging configuration when sourcing components. Confirm that the AEC-Q100 qualification status aligns with your automotive application requirements. Ensure the SOIC-16 package dimensions match your PCB footprint constraints. Cross-reference the datasheet revision date to confirm parameter accuracy against your design specifications.

Digital Isolators Selection Notes

Select this component when unidirectional signal transmission is required alongside high-speed data rates. The 150 Mb/s speed suits applications needing rapid communication between isolated domains. Consider the 5000 Vrms rating for systems demanding significant potential difference separation. Evaluate the low propagation delay for timing-critical control loops where minimal latency is essential.

Digital Isolators Part Context

This part belongs to the SI864x series of digital isolators from Skyworks Solutions. It shares architectural similarities with other members like the SI8640BT-ASR but differs in packaging and specific automotive qualifications. The series utilizes proprietary capacitive isolation technology to replace traditional optocouplers in modern electronic designs.

Digital Isolators Replacement Considerations

The SI8640BT-ASR serves as a public confirmed substitute offering similar electrical characteristics and channel count. Verify pinout compatibility and thermal performance before swapping these components in existing designs.