Original Part
Alternative Part
1. ISL83072EIBZA Substitution Conclusion
Direct substitution is not viable. Two fundamental differences exist between the ISL83072EIBZA and the original part. First, its supply voltage is 3.3V (3V to 3.6V), whereas the original part operates at 5V (4.5V to 5.5V). These voltage levels are incompatible within the same power system; a direct replacement would cause the ISL83072EIBZA to malfunction or be damaged. Second, its maximum data rate is limited to 250kbps, significantly lower than the original part's 20Mbps capability. This confines its use to low-speed communication applications. Deploying it in the original high-speed (≤20Mbps) bus design would result in communication failure or severe performance degradation. Substitution can only be considered if the target application is a 3.3V system with a communication rate below 250kbps, and only after modifying the power supply design accordingly.
2. SP3088EEN-L/TR Substitution Conclusion
Direct substitution is generally acceptable in most cases, but noise immunity requirements should be evaluated. The SP3088EEN-L/TR aligns closely with the original part in key electrical parameters: both operate from a 5V supply (4.5V to 5.5V) and support high-speed data rates up to 20Mbps, ensuring compatibility in both power and communication performance. The critical difference lies in the receiver hysteresis. The SP3088EEN-L/TR features 100mV of hysteresis, notably higher than the original part's 30mV. A receiver with greater hysteresis offers superior noise immunity, preventing false output triggering on a noisy bus and thereby enhancing system robustness. However, in theory, excessively high hysteresis may slightly reduce sensitivity to extremely weak valid signals. For applications in noisy environments like industrial or automotive systems, this difference is typically advantageous, and direct substitution is recommended. For exceptionally clean environments with very low signal amplitudes, bench validation is advised prior to implementation.
Analysis ID: D95A-EE98000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com