1. SPC56EL60L5CBOSY Substitution Assessment The SPC56EL60L5CBOSY shows high compatibility with the original SPC5643LFF2MLQ1 in core architecture (e200z4d), memory configuration (1MB FLASH, 128KB RAM), package (144-LQFP), and core peripherals (DMA, PWM, WDT). However, critical differences must be evaluated. First, the FlexRay interface is absent. Direct substitution is not viable if the original design relies on FlexRay communication. Second, the operating voltage range is narrower (3V–3.63V vs. 3V–5.5V), requiring verification of power supply compatibility. Third, the device is explicitly AEC-Q100 qualified, offering enhanced reliability for automotive applications. If the target application does not require FlexRay and operates on a 3.3V supply rail, the SPC56EL60L5CBOSY can be considered a drop-in replacement with improved reliability. Otherwise, hardware modifications or comprehensive re-validation are necessary.