Original Part
Alternative Part
1. ADM1485ARZ-REEL7 Substitution Conclusion
From the perspective of key electrical parameters and package, the ADM1485ARZ-REEL7 can serve as a direct replacement for the original SP1485ECN-L/TR. Both devices operate from a 5V supply and utilize the identical 8-SOIC package, ensuring physical compatibility and a seamless fit within the existing power system. The primary differences lie in the ADM1485ARZ-REEL7's higher data rate (30Mbps vs. 20Mbps) and greater receiver hysteresis (70mV vs. 20mV). The increased rate provides headroom for more demanding communication, while the larger hysteresis translates to superior noise immunity and more robust signal recognition at the receiver in noisy industrial environments. This constitutes a positive performance enhancement and is not expected to introduce compatibility issues.
2. ADM3485EARZ-REEL7 Substitution Conclusion
The ADM3485EARZ-REEL7 is not a suitable direct replacement for the original SP1485ECN-L/TR. The primary obstacle is supply voltage incompatibility. It operates from a 3.0V to 3.6V range, whereas the original part is designed for a 5V system (4.75V-5.25V). Direct substitution would prevent proper operation and risk damaging the device. Furthermore, its data rate (10Mbps) is lower than the original's (20Mbps), which could become a bottleneck in high-throughput applications. Although its greater receiver hysteresis (50mV) offers improved noise rejection, the fundamental discrepancies in voltage and data rate preclude a pin-compatible, drop-in replacement within the original 5V, 20Mbps design.
Analysis ID: CAE6-585D000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com