Original Part
Alternative Part
1. ADM1485ARZ-REEL7 Substitution Conclusion
The ADM1485ARZ-REEL7 is a highly viable direct substitute. The key difference is its receiver hysteresis of 70 mV, which is higher than the original part's 50 mV. This provides enhanced noise immunity and more stable signal recognition in electrically noisy environments, constituting a performance improvement. Since the core functional protocol (RS422/485), data rate (30 Mbps), supply voltage (5V), and package (8-SOIC) are identical, this variance typically does not cause compatibility issues. It can instead improve system robustness, making direct substitution acceptable.
2. SP3088EEN-L/TR Substitution Conclusion
The substitution feasibility for the SP3088EEN-L/TR is conditional and depends on the application's data rate requirements. Two key differences exist compared to the original part: first, its maximum data rate is only 20 Mbps, lower than the original's 30 Mbps. Substitution will cause communication failure if the original system operates above 20 Mbps. Second, its receiver hysteresis is significantly higher at 100 mV. While this offers excellent noise immunity, it may also shift the signal switching threshold, requiring attention in systems with poor signal edge quality. Its slightly wider supply range (4.5V to 5.5V) is a minor advantage. Substitution should only be considered when the system communication rate is definitively ≤20 Mbps, and validation testing in the target application is strongly recommended.
Analysis ID: 9F7C-9DDA000
Based on part parameters and for reference only. Not to be used for procurement or production.
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