The maximum clock frequency of the 74HC74D is 25 MHz, but it can vary depending on the operating conditions and the quality of the clock signal.
To ensure proper initialization, connect the preset (PRE) and clear (CLR) inputs to VCC through a 1 kΩ resistor and a 10 nF capacitor to ground, respectively. This will ensure that the flip-flops are reset on power-up.
The recommended operating voltage range for the 74HC74D is 2.0 V to 6.0 V, with a typical voltage of 5.0 V.
The asynchronous reset (CLR) input should be connected to VCC through a 1 kΩ resistor and a 10 nF capacitor to ground. This will ensure that the flip-flops are properly reset on power-up and during normal operation.
The maximum current that the 74HC74D can sink or source is 25 mA per output, with a total current limit of 100 mA for all outputs combined.
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