SI88621EC-AS

Overview

The SI88621EC-AS is a high-speed digital isolator featuring two independent channels with an integrated DC-DC converter. It operates at data rates up to 150 Mbps and provides 5000 Vrms isolation voltage. The device supports unidirectional signal transmission with a propagation delay of 18 ns. It functions within a supply voltage range of 2.5 V to 5.5 V and includes an enable/disable control feature. The component utilizes capacitive coupling technology for signal isolation.

Feature Summary

• Integrates a DC-DC converter to power the isolated side without external components
• Provides high common-mode transient immunity for reliable noise rejection
• Operates without start-up initialization requirements for immediate functionality
• Supports wide operating supply voltages for flexible system integration

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing high-voltage safety isolation
• Power electronics monitoring and control circuits
• Automotive electronic control units (ECUs)

Procurement Notes

Verify the specific suffix 'AS' against official Skyworks documentation to confirm package type and tape/reel specifications. Ensure the selected variant matches the required isolation voltage rating and channel configuration for your design. Cross-reference the datasheet revision date to guarantee compatibility with current manufacturing standards.

Selection Notes

Select this component when high-speed data transfer up to 150 Mbps is required alongside robust electrical isolation. The integrated DC-DC converter simplifies board layout by eliminating external power supplies for the isolated domain. Consider the SOIC-20 package dimensions and thermal characteristics during PCB design to ensure adequate heat dissipation and space allocation.

Part Context

This part belongs to the Si88621 family of CMOS digital isolators from Skyworks Solutions. These devices are designed to replace traditional optocouplers in applications demanding higher speed, lower power consumption, and greater reliability. The family offers various configurations to suit different isolation and data rate requirements.

Replacement Considerations

Check for direct substitutes like SI88621EC-ISR or SI88621BC-IS if packaging differences exist. Verify that alternative parts maintain the same 5000 Vrms isolation rating and 150 Mbps data rate. Ensure pinout compatibility before swapping to avoid redesigning the printed circuit board.