The maximum clock frequency of the SN74HCT574N is 40 MHz.
To ensure that the outputs are in a known state during power-up, connect the OE (output enable) pin to GND or use an external pull-down resistor to force the outputs low during power-up.
The maximum current that the SN74HCT574N can sink or source is 6 mA per output pin.
Yes, the SN74HCT574N is compatible with 5V systems, but ensure that the input voltage (VCC) is within the recommended operating range of 4.5V to 5.5V.
The asynchronous reset (RST) input should be tied to VCC through a pull-up resistor (e.g., 1 kΩ) to ensure that the device is properly reset during power-up.