Original Part
General Purpose Digital Isolator 2500Vrms 1 Channel 100Mbps 25kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
Alternative Part
General Purpose Digital Isolator 2500Vrms 1 Channel 1Mbps 35kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
General Purpose Digital Isolator 3750Vrms 1 Channel 15Mbps 35kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
1. SI8610AB-B-ISR Substitution Conclusion
This device is compatible in package and isolation voltage (2500Vrms) with the original part. However, the key differences are a significantly reduced data rate (only 1Mbps versus the original 100Mbps) and substantially increased propagation delay and pulse‑width distortion (max. 35ns delay, 25ns distortion). It is suitable only for isolating low‑frequency switching signals where timing is not critical. If used as a direct replacement for the original part in high‑speed digital communication or precision timing‑control applications, signal‑integrity issues or communication failures may occur. Therefore, it can only be considered a downgraded substitute in low‑speed, non‑critical timing scenarios.
2. SI8718BC-A-IS Substitution Conclusion
This part offers superior isolation voltage (3750Vrms) and common‑mode transient immunity (35kV/µs) compared to the original part. However, its data rate (15Mbps) and timing performance (max. 50ns delay, 25ns distortion) remain notably inferior to the original specifications of 100Mbps and 2ns distortion. The higher isolation rating makes it suitable for environments with stricter insulation requirements. Nevertheless, its low speed and high latency prevent it from meeting the potential high‑speed data transfer or fast‑response needs of the original design. Consequently, it is applicable only where isolation voltage must be upgraded and speed requirements are relaxed, and it cannot serve as a full‑functional replacement.
Analysis ID: 5D82-9FD3000
Based on part parameters and for reference only. Not to be used for procurement or production.
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