1. SPC56EL60L5CBOSY Substitution Conclusion The SPC56EL60L5CBOSY exhibits a high degree of compatibility with the original SPC5643LFF2MLQ1R in terms of core architecture (e200z4d), performance (dual-core 120MHz), memory capacity (1MB Flash/128KB RAM), and package (144-LQFP). It also explicitly meets the AEC-Q100 automotive-grade qualification, enhancing reliability under harsh environmental conditions. Key differences exist, however. First, regarding communication interfaces: the original part supports FlexRay, whereas the substitute only supports SCI. If the original design relies on FlexRay, hardware or protocol adjustments will be necessary. Second, the supply voltage range differs: the substitute operates within a narrower range (3V–3.63V vs. 3V–5.5V), requiring verification of power system compatibility. Third, in peripheral configuration, the substitute does not explicitly support the original’s POR but integrates an LVD, which may affect low-voltage management logic. If the application does not require FlexRay and the power supply can be adapted to a 3.3V system, this substitute can be functionally and reliably compatible in most respects. Nevertheless, detailed validation of peripheral drivers and pin mapping is recommended to ensure full compatibility.