SI88640ED-ASR

Overview

The SI88640ED-ASR is a quad-channel digital isolator manufactured by Skyworks Solutions. It features four unidirectional channels with a data rate of 100 Mb/s and an insulation voltage of 5000 Vrms. The device operates on a supply voltage between 3 V and 5.5 V, drawing a typical operating current of 11 mA. Key electrical parameters include a propagation delay of 18 ns, rise/fall times of 2.5 ns, and pulse width distortion of 4.5 ns. It is housed in a 24-SOIC package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Provides galvanic isolation for four independent signal paths using capacitive coupling technology.
• Supports high common-mode transient immunity to protect against noise interference.
• Operates within a wide industrial temperature range for reliable performance.
• Features low power consumption suitable for energy-efficient system designs.

Applications

• Industrial automation systems requiring isolated communication interfaces
• Medical equipment needing safe patient isolation barriers
• Power electronics control circuits with high-voltage separation needs

Procurement Notes

Verify the specific suffix ASR indicates reel packaging when ordering. Confirm the 24-SOIC package dimensions match your PCB footprint requirements. Ensure the 5000 Vrms isolation rating meets your safety standards. Check for RoHS compliance documentation if required by your manufacturing process. Validate the 3V to 5.5V supply voltage compatibility with your system logic levels.

Selection Notes

Select this component when four isolated bidirectional or unidirectional channels are needed at 100 Mbps. Compare against SI88440ED-ASR if a 20-pin SOIC package is preferred instead of 24-pin. Consider SI88642EC-ASR if integrated DC-DC conversion is required for isolated power. Ensure the 40kV/µs CMTI specification aligns with your noise environment. Verify that the unidirectional channel configuration fits your signal flow requirements.

Part Context

This part belongs to the Si88640 series of general-purpose digital isolators. It complements other Skyworks isolation products like the SI86xx and SI88xx families. The series focuses on providing robust isolation for digital signals in noisy environments. It serves as a replacement for traditional optocouplers in modern interface applications.

Replacement Considerations

Public confirmed substitute part numbers: SI88640ED-AS (tape and reel variant without R suffix). SI88440ED-ASR (different package, same channel count). SI88642EC-ASR (includes DC-DC converter).