Original Part
Alternative Part
1. PL123-05SC-R Substitution Conclusion
From the perspective of core functionality and key parameters, the PL123-05SC-R demonstrates high feasibility for substituting the NB2305AI1HDR2G. Both are 1:5 zero-delay buffers utilizing CMOS logic levels, with fully compatible operating voltage (3-3.6V), maximum frequency (134MHz vs. 133MHz), and package (8-SOIC). The primary difference lies in the PLL specification: the PL123-05SC-R is listed as "Yes with Bypass," while the original part is simply "Yes." The Microchip device integrates a clock bypass feature, allowing the input clock to bypass the PLL and be routed directly to the outputs in cases of PLL loss-of-lock or when a direct path is required. This enhances system reliability and flexibility under abnormal conditions, representing a functional enhancement rather than a limitation. Therefore, substitution is viable.
2. PL123S-05SC-R Substitution Conclusion
The conclusion regarding the feasibility of substituting the original NB2305AI1HDR2G with the PL123S-05SC-R is identical to that for the PL123-05SC-R, confirming high substitutability. Their parameter lists are exactly the same, including the critical "PLL with Bypass" feature. The additional "S" suffix in the part number typically denotes a specific version or packaging option and does not affect electrical characteristics or functionality. Compared to the original part, the difference similarly lies in the provision of the clock bypass function. This offers additional safety redundancy and operational mode choices for system design, contributing to improved design robustness and does not present an obstacle to substitution.
Analysis ID: 879E-CCF1000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com