Original Part
General Purpose Digital Isolator 3750Vrms 1 Channel 15Mbps 35kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
Alternative Part
General Purpose Digital Isolator 2500Vrms 1 Channel 100Mbps 25kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
General Purpose Digital Isolator 3000Vrms 1 Channel 100Mbps 85kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
1. ISO722D Substitution Conclusion
Direct substitution is not recommended. The primary discrepancy lies in the isolation voltage: ISO722D's rating (2500 Vrms) is significantly lower than that of the original part (3750 Vrms). This directly reduces insulation and safety margins in high‑voltage environments, likely failing to meet the original design’s dielectric withstand requirements. Although its data rate (100 Mbps) and dynamic performance (e.g., propagation delay, edge rates) are superior, these cannot compensate for the degradation in the critical safety parameter of isolation voltage. Substitution may only be considered in applications where the isolation voltage requirement does not exceed 2500 Vrms; otherwise, a safety risk exists.
2. ISO7710D Substitution Conclusion
Substitution is recommended, with overall performance being superior. While its isolation voltage (3000 Vrms) is slightly lower than the original part’s 3750 Vrms, it remains within the same class for many industrial applications and satisfies most use cases. Its key advantage is a far higher CMTI (85 kV/µs vs. 35 kV/µs), which provides excellent noise immunity in harsh environments such as motor drives and power supplies, thereby enhancing system reliability. Additionally, it offers a high data rate (100 Mbps) comparable to the ISO722D, faster propagation delay, and better supply‑voltage compatibility (2.25 V to 5.5 V). The ISO7710D delivers a comprehensive performance upgrade while maintaining sufficient isolation strength.
Analysis ID: 6AFB-9252000
Based on part parameters and for reference only. Not to be used for procurement or production.
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