The maximum clock frequency of the SN74S194N is 36 MHz, but it can vary depending on the operating voltage and temperature. It's recommended to check the timing diagrams and electrical characteristics in the datasheet for more information.
To ensure proper power and decoupling, connect the VCC pin to a stable 5V power supply, and decouple the power pins with 0.1uF ceramic capacitors. Additionally, use a 10uF electrolytic capacitor to filter out any noise on the power line.
The maximum input voltage of the SN74S194N is 5.5V, which is the absolute maximum rating. However, it's recommended to keep the input voltage within the recommended operating range of 4.5V to 5.5V to ensure reliable operation.
The asynchronous clear (CLR) input should be tied to VCC through a pull-up resistor (e.g., 1kΩ) to prevent accidental clearing of the counter. When CLR is low, the counter is reset to zero, regardless of the clock input.
The propagation delay of the SN74S194N is typically around 10-15 ns, but it can vary depending on the operating voltage, temperature, and load capacitance. Check the datasheet for more information on the timing characteristics.
SN74S194N datasheet
by Texas Instruments
