SY100EL32VZG-TR Substitution Conclusion After comparison, the SY100EL32VZG-TR can serve as a direct replacement for the MC100EL32DR2G in terms of core functionality and package. However, a critical difference exists in their supply voltage ranges, making substitution feasibility highly dependent on the original design's power system. Specifically, the original part (Onsemi) is rated for a strict 4.2V to 5.7V operating range, typically applied in traditional 5V ECL logic power environments. In contrast, the substitute (Microchip) operates from 3.3V to 5V. This allows compatibility with lower 3.3V systems, but its maximum voltage rating (5V) is lower than the original's maximum (5.7V). If the original circuit's supply voltage is designed around 5V with upward margin or fluctuation (approaching or exceeding 5V), direct substitution carries a risk of damage. If the system supply is stable at or below 5V (e.g., a standard 5V ±5% or a 3.3V system), the substitution is electrically and functionally viable. The designer must first verify that the actual supply voltage falls entirely within the substitute's 3.3V–5V range. This is the sole critical factor determining substitution success.