2. SIT8208AI-G2-25E-62.500000Y Substitution Conclusion Similarly, this model cannot directly replace the original part. Its technical parameters are identical to the aforementioned X variant, with the core difference remaining the 2.5V supply voltage (versus 3.3V for the original). This discrepancy directly leads to power compatibility and signal level matching issues: without modifying the system power design, substitution may cause oscillator failure or reduced output drive capability due to undervoltage. Moreover, the 2.5V output level may be interpreted as an indeterminate state in a 3.3V system, compromising timing reliability. While there is no difference in the listed parameters between the X and Y variants, attention should be paid to potential hidden variations in unlisted parameters (such as temperature range or production lot). The complete datasheet should be reviewed before substitution.