The maximum clock frequency of the SN74HC166N is 25 MHz, but it can vary depending on the operating voltage and temperature.
To ensure correct data shifting, make sure to clock the device on the rising edge of the clock signal, and ensure that the data is stable before the clock transition.
Yes, the SN74HC166N can be used as a serial-to-parallel converter by connecting the serial input to the data input and the parallel outputs to the desired output pins.
The SN74HC166N can drive up to 50 pF of capacitance on each output pin, but this can vary depending on the operating frequency and voltage.
The SN74HC166N has an asynchronous reset input (MR) that can be used to reset the device. When the MR input is low, the device is reset and all outputs are cleared.