Original Part
Alternative Part
1. ADM483EARZ-REEL Substitution Conclusion
The conclusion is a conditional substitution, applicable only to low-speed, high-noise-immunity applications. Compared to the original LTC1484IS8, its data rate (250 kbps vs. 4 Mbps) is significantly insufficient for any medium- to high-speed communication scenario. However, its receiver features a higher hysteresis voltage (70 mV vs. 30 mV), providing superior noise immunity in equivalent noisy environments. Furthermore, its supply voltage range (4.5V to 5.5V) is compatible, and the package is identical. Therefore, it can serve as a substitute in 5V systems where the data rate requirement does not exceed 250 kbps and environmental noise is significant.
2. SP3494CN-L Substitution Conclusion
The conclusion is that direct substitution is not feasible due to core supply voltage incompatibility. This device is a 3.3V part (3V to 3.6V), whereas the original part is a 5V device (4.75V to 5.25V). They cannot operate on the same power rail; direct replacement would likely damage the SP3494CN-L or cause operational faults. Additionally, its data rate (2.5 Mbps) is lower than the original's (4 Mbps), limiting performance in applications requiring full-rate operation. It could only be considered as a candidate for a system-level redesign—not a pin-to-pin direct replacement—when the target system is 3.3V powered and the reduced data rate is acceptable.
Analysis ID: F117-FCEC000
Based on part parameters and for reference only. Not to be used for procurement or production.
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