The maximum clock frequency of the 74HC273DB,118 is 100 MHz, but it can vary depending on the operating voltage and temperature.
To ensure proper initialization, connect the CLR (clear) input to a pull-up resistor and a capacitor to VCC. This will ensure that the flip-flops are cleared during power-up.
Yes, the 74HC273DB,118 can be used as a level shifter, but it's not recommended as it's not designed for that purpose. The device is intended for use as a D-type flip-flop, and using it as a level shifter may affect its performance and reliability.
The maximum current that the 74HC273DB,118 can sink or source is 25 mA per output pin, but it's recommended to keep the current below 10 mA to ensure reliable operation.
The asynchronous clear (CLR) input should be handled carefully to avoid unintended clearing of the flip-flops. It's recommended to use a debouncing circuit or a synchronizer to ensure that the CLR input is properly synchronized with the clock signal.