The maximum clock frequency of the SN74LS378D is 25 MHz, but it can vary depending on the operating conditions and the quality of the clock signal.
To ensure proper power and decoupling, use a 5V power supply with a minimum of 10uF decoupling capacitor between VCC and GND, and place the capacitor as close to the device as possible.
The maximum input voltage that the SN74LS378D can tolerate is 7V, but it's recommended to keep the input voltage within the recommended operating range of 4.75V to 5.25V to ensure reliable operation.
The asynchronous reset input (CLR) should be tied to VCC through a pull-up resistor (e.g., 1kΩ) to ensure that it is not left floating. When CLR is low, the device is reset, and when it is high, the device operates normally.
The propagation delay of the SN74LS378D is typically around 10ns to 15ns, but it can vary depending on the operating conditions, temperature, and load capacitance.