Original Part
Alternative Part
1. ADM3490ARZ Substitution Conclusion
The ADM3490ARZ is not a direct drop-in replacement for the original part. The core incompatibility lies in its supply voltage range (3V to 3.6V), which is entirely mismatched with the original 5V system specification (4.75V to 5.25V). Direct substitution would prevent the device from functioning and could cause damage. Secondly, its receiver hysteresis (50 mV) is lower than the original's 70 mV. Under identical noise conditions, this results in marginally weaker noise immunity and signal integrity. Substitution is only feasible if the target system operates at 3.3V and the electrical noise environment is exceptionally clean.
2. ISL8490EIBZ-T Substitution Conclusion
The ISL8490EIBZ-T demonstrates high potential for direct substitution. Its key electrical parameters align closely with the original part: its supply voltage range (4.5V to 5.5V) fully encompasses and is slightly wider than the original's 4.75V to 5.25V, allowing seamless integration into a 5V system. The receiver hysteresis is identical at 70 mV, ensuring equivalent noise rejection performance. Furthermore, the data rate, protocol, and package are fully compatible. Prior to finalizing the replacement, a final verification of the datasheets is recommended to confirm alignment on secondary parameters such as enable logic, pinout configuration, and ESD rating.
Analysis ID: B3A7-6C9C000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com