The maximum clock frequency of the SN74LS165AD is 2 MHz, but it can be operated at higher frequencies with proper signal integrity and layout considerations.
To ensure proper latching, the clock signal should be a clean, glitch-free signal, and the data should be stable for at least 20 ns before the rising edge of the clock signal.
The recommended operating voltage range for the SN74LS165AD is 4.75V to 5.25V, with a typical operating voltage of 5V.
The asynchronous clear function should be used with caution, as it can cause data loss if not properly synchronized with the clock signal. It is recommended to use the synchronous clear function instead, if possible.
The SN74LS165AD can drive up to 15 pF of capacitance, but it is recommended to keep the load capacitance as low as possible to ensure proper signal integrity.
SN74LS165AD datasheet
by Texas Instruments
