Original Part
Alternative Part
1. ADM488ARZ-REEL Substitution Conclusion
Direct substitution is not feasible. The key differences are as follows: First, the duplex mode changes from half-duplex to full-duplex, resulting in completely different pin definitions and external network connections (full-duplex requires independent transmit and receive differential pairs), necessitating a PCB redesign. Second, the supply voltage range is narrowed from 3V–5.5V to 4.5V–5.5V, making it unsuitable for low-voltage systems such as 3.3V and limiting application compatibility. Third, receiver hysteresis is reduced from 150mV to 70mV, significantly degrading noise immunity (noise margin) in electrically noisy environments and potentially compromising communication reliability. Substitution is not recommended unless the system already operates at 5V and the redesign effort and reliability trade-off are acceptable.
2. ADM483EARZ-REEL Substitution Conclusion
Substitution is possible under specific conditions but is not ideal and requires careful evaluation. Like the original part, it operates in half-duplex mode and is pin-compatible, which forms the basis for substitution. However, differences remain: First, the supply voltage range is similarly narrowed from 3V–5.5V to 4.5V–5.5V, completely ruling out its use in any system below 4.5V (e.g., 3.3V); this is the primary constraint for substitution. Second, receiver hysteresis is reduced from 150mV to 70mV, which likewise weakens stability and communication distance in electrically noisy environments. If the original design already uses a 5V supply and operates in a low-noise environment, this device can serve as a cost-reduction alternative. Otherwise, voltage compatibility and reliability risks make substitution impractical.
Analysis ID: 9460-16C6000
Based on part parameters and for reference only. Not to be used for procurement or production.
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