SI88640EC-ISR

Overview

The SI88640EC-ISR is a general-purpose digital isolator from Skyworks Solutions, featuring four unidirectional channels with an integrated DC-DC converter. It utilizes capacitive coupling technology to provide electrical isolation with a rated insulation voltage of 5000 Vrms. The device supports data rates up to 100 Mb/s and offers a common-mode transient immunity of 40 kV/µs. Operating within a supply voltage range of 3 V to 5.5 V, it exhibits a typical propagation delay of 18 ns and rise/fall times of 2.5 ns. Designed for robust industrial environments, it functions reliably across temperatures from -40°C to +125°C and is housed in a 24-SOIC package.

Feature Summary

• Integrates a high-efficiency DC-DC converter to generate isolated power, eliminating the need for external magnetic components.
• Employs silicon-based capacitive coupling technology to achieve high reliability and reduced size compared to optical couplers.
• Provides bidirectional signal isolation through four independent unidirectional channels with high noise immunity.

Applications

• Industrial automation systems requiring galvanic isolation between control logic and field devices.
• Programmable Logic Controllers (PLCs) for input/output module isolation.
• Inverter and motor drive circuits for gate driver signal transmission.
• Servo motor control interfaces demanding high-speed data transfer.

Procurement Notes

Verify that the specific suffix 'ISR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the 5000 Vrms isolation rating meets the safety standards applicable to your target market. Ensure the integrated DC-DC converter specifications align with the power budget of the isolated side circuitry before finalizing the bill of materials.

Selection Notes

Select this component when a compact solution combining signal isolation and isolated power generation is necessary. It is suitable for designs replacing traditional optocouplers to reduce board space and power consumption. Consider the 24-SOIC footprint for compatibility with existing layouts. Evaluate the 100 Mb/s data rate against system timing requirements to ensure adequate performance margins for high-speed communication protocols.

Part Context

This part belongs to the Si88xx ISOvolt family, which integrates digital isolation with on-chip DC-DC conversion. The series is engineered to replace legacy optocoupler solutions by offering superior speed, lower power consumption, and higher channel density. The EC designation typically indicates automotive qualification or extended temperature capabilities within the manufacturer's portfolio structure.

Replacement Considerations

SI88640EC-IS