1. SN65LVELT22DGKR Substitution Conclusion The SN65LVELT22DGKR can serve as a potential substitute for the SY100ELT22LZG-TR in core functionality, but two key differences must be noted. First, the output signal levels differ: the original device outputs standard PECL (typically 5V), whereas the TI part outputs LVPECL (typically 3.3V). When substituting, ensure the downstream receiving circuit is compatible with the lower LVPECL levels; otherwise, issues such as signal amplitude or common‑mode voltage mismatch may arise. Second, the package dimensions differ: the original device uses an 8‑SOIC (width 3.90 mm), while the TI device comes in an 8‑VSSOP (width 3.00 mm). The smaller footprint may require PCB layout adjustments to the pad design and could affect thermal performance and assembly processes. If the system power supply and signal interfaces are compatible with LVPECL levels and the package change is acceptable, the substitution is feasible. However, it is recommended to validate high‑speed signal integrity in the actual application.