1. ADM483EARZ-REEL Substitution Conclusion Direct substitution is largely impractical and carries significant risk. Compared to the original LTC2862, the ADM483 presents two critical disadvantages. First, its maximum data rate is limited to 250kbps, far below the original's 20Mbps. If the original system operates at higher speeds, the substitution will likely result in communication failure or a sharp increase in bit error rate. Second, its operating voltage range is 4.5V to 5.5V, which is incompatible with the original part's wider 3V to 5.5V range. If the original design utilizes a 3.3V supply, the replacement will fail to function. Additionally, its receiver hysteresis (70mV) is only half that of the original part (150mV), resulting in significantly weaker noise immunity in electrically noisy environments. Substitution may only be considered if the original system is definitively confirmed to operate from a 5V supply and at a communication speed below 250kbps. Otherwise, it is not recommended.