Original Part
Alternative Part
1. ADM3485EARZ-REEL7 Substitution Conclusion
The ADM3485EARZ-REEL7 can serve as a replacement for the original SP3494CN-L/TR, with the following key differences noted: it offers a higher data rate (10 Mbps vs. 2.5 Mbps) and greater receiver hysteresis (50 mV vs. 20 mV). The increased data rate maintains backward compatibility with the original 2.5 Mbps communication requirement while providing headroom for future upgrades or higher-speed applications. The higher hysteresis improves noise immunity, effectively suppressing signal interference; however, it may require a larger signal amplitude to reliably trigger the receiver, which could reduce sensitivity in low-amplitude signal environments. Overall, given compatible supply voltage, package, and protocol, this substitution is feasible, but system noise conditions and signal integrity should be validated to ensure compatibility with the hysteresis change.
2. ADM3072EYRZ-REEL7 Substitution Conclusion
The ADM3072EYRZ-REEL7 is not a suitable replacement for the original SP3494CN-L/TR due to critical performance mismatches: its data rate is significantly lower (250 kbps vs. 2.5 Mbps) and its receiver hysteresis is higher (100 mV vs. 20 mV). The lower data rate cannot meet the original 2.5 Mbps high-speed communication requirement, which may result in insufficient throughput or complete communication failure, thereby limiting system performance. While the increased hysteresis provides stronger noise immunity, this advantage does not compensate for the data rate mismatch. Moreover, the excessive hysteresis may further degrade receiver sensitivity under low-amplitude signal conditions. Although the package and supply voltage are compatible, the data rate incompatibility renders this substitution unworkable.
Analysis ID: A654-68B8000
Based on part parameters and for reference only. Not to be used for procurement or production.
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