Original Part
62.5 MHz XO (Standard) LVCMOS, LVTTL Oscillator 3.3V Enable/Disable 4-SMD, No Lead
Alternative Part
62.5 MHz XO (Standard) LVCMOS, LVTTL Oscillator 2.5V Enable/Disable 4-SMD, No Lead
62.5 MHz XO (Standard) LVCMOS, LVTTL Oscillator 2.8V Enable/Disable 4-SMD, No Lead
1. SIT8208AI-G1-25E-62.500000Y Substitution Conclusion
The primary deviation of this substitute from the original part is its reduced supply voltage of 2.5V, down from 3.3V. All other key parameters—including frequency (62.5 MHz), stability (±20ppm), package footprint, and current consumption—remain identical. For a direct drop-in replacement, it is critical to verify compatibility with the target system's power rail and signal levels. The 2.5V LVCMOS/LVTTL output high level (VOH) may fall below the minimum threshold required for a logic '1' in the original 3.3V system. This mismatch can lead to signal recognition errors or insufficient timing margin, a risk that becomes particularly pronounced when driving devices with higher input thresholds. This substitution is only viable in systems where the supply can be adjusted to 2.5V or where the receiving circuitry is explicitly compatible with lower voltage inputs. Otherwise, a full re-evaluation of circuit compatibility is necessary.
2. SIT8208AI-G1-28E-62.500000T Substitution Conclusion
The core distinction of this model from the original is its 2.8V supply voltage (versus 3.3V). Additionally, the suffix "T" may indicate a difference in temperature range or packaging (requiring confirmation via manufacturer datasheets), while all other technical specifications are highly consistent. The voltage differential will result in a reduced output signal amplitude, potentially affecting noise margin and rise/fall times. Signal integrity must be carefully evaluated, especially in high-speed or long-trace applications. Substitution is feasible if the system power supply and receivers are compatible with 2.8V logic levels (e.g., accepting voltages above ~2.0V as a valid high). However, timing performance and drive capability under actual operating conditions must be validated. It is generally advisable to prioritize alternative parts within the same voltage domain. If not possible, thorough bench testing is recommended to ensure reliability.
Analysis ID: D407-AFE2000
Based on part parameters and for reference only. Not to be used for procurement or production.
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