SI88340EC-ASR

Digital Isolators Overview

The SI88340EC-ASR is a general-purpose digital isolator from Skyworks Solutions, featuring four unidirectional channels in a 24-SOIC package. It operates on a supply voltage of 3 V to 5.5 V with a typical operating current of 10.8 mA. The device supports data rates up to 100 Mb/s and provides an isolation voltage of 3750 Vrms using capacitive coupling technology. Key electrical specifications include a propagation delay of 18 ns, rise and fall times of 2.5 ns, and a common-mode transient immunity of 40 kV/µs. It functions within a temperature range of -40°C to +125°C.

Digital Isolators Feature Summary

• Four-channel unidirectional signal isolation utilizing capacitive coupling technology for high-speed data transmission.
• High common-mode transient immunity rated at 40 kV/µs to ensure reliable operation in noisy environments.
• Integrated shutdown functionality allows for power management and control over signal states.
• Wide operating temperature range supports deployment in demanding industrial and automotive conditions.

Digital Isolators Applications

• Industrial automation systems requiring galvanic isolation between microcontrollers and sensors.
• Automotive electronics interfaces needing robust signal integrity across different voltage domains.
• Power supply circuits for monitoring and feedback loop isolation.
• Medical equipment requiring safe patient isolation and signal transmission.

Digital Isolators Procurement Notes

Verify the specific suffix 'ASR' to confirm the reel packaging format and inclusion of the shutdown pin configuration. Ensure the selected variant matches the required isolation voltage rating of 3750 Vrms for your application safety standards. Cross-reference the 24-SOIC footprint dimensions during PCB layout to guarantee mechanical compatibility. Confirm moisture sensitivity level handling procedures are followed upon receipt to maintain component reliability.

Digital Isolators Selection Notes

Select this component when unidirectional isolation is sufficient for the system architecture. The 100 Mb/s data rate suits most standard communication protocols like SPI and UART. Consider the 10.8 mA supply current for power budget calculations in battery-operated devices. The wide temperature range makes it suitable for harsh environments where standard commercial grade parts may fail.

Digital Isolators Part Context

This part belongs to the Si8834x family of digital isolators, designed as replacements for traditional optocouplers. The family offers improved performance metrics including lower power consumption and higher speed. The EC suffix indicates the specific insulation and safety certification ratings, while ASR denotes the tape and reel packaging option for automated assembly processes.

Digital Isolators Replacement Considerations

SI88640EC-AS is listed as a parametric equivalent in distributor databases. Verify functional compatibility regarding channel count and isolation voltage before substitution. Check if the replacement part maintains the same shutdown feature and package dimensions for direct board swap applications.