The maximum clock frequency of the SN74HC590ADR is 100 MHz.
To ensure that the outputs are in a high-impedance state during power-up, connect the OE (output enable) pin to VCC through a pull-up resistor.
The recommended operating voltage range for the SN74HC590ADR is 2V to 6V.
The asynchronous reset (RST) input should be tied to VCC through a pull-up resistor to prevent accidental resets. A capacitor can also be added to filter out noise.
The maximum current that the SN74HC590ADR can sink or source is 25 mA per output pin.