The maximum frequency of operation for the 74HC251D is typically around 30-40 MHz, but it can vary depending on the specific application and operating conditions.
To ensure proper power and decoupling, connect the VCC pin to a stable 5V power supply, and decouple the power supply lines with 0.1uF ceramic capacitors as close to the device as possible.
The 74HC251D can sink or source up to 25mA of current per output pin, but it's recommended to limit the current to 10-15mA to ensure reliable operation.
The enable inputs (E1 and E2) should be driven with a logic level signal (0V or VCC) to enable or disable the device. Avoid floating or undefined states on these inputs.
The propagation delay of the 74HC251D is typically around 10-20ns, but it can vary depending on the specific application and operating conditions.
