1. SIT8208AI-G1-25E-62.500000T Substitution Conclusion Direct substitution of this model for the original is considered low feasibility, primarily due to the supply voltage reduction from 2.8V in the original to 2.5V. If the existing system power design only supports 2.8V, direct replacement may introduce output voltage amplitude or timing compatibility issues. Although both outputs are LVCMOS/LVTTL, the high‑level threshold under 2.5V supply could fall below the receiver’s tolerance in a 2.8V system. It is essential to verify whether the downstream device’s input voltage range is compatible with 2.5V logic levels. All other key parameters—frequency, stability, package, and power consumption—remain identical. If the system power can be adjusted to 2.5V or the receiver tolerates the lower voltage level, functional substitution is viable.