The CD74HC74 is a clocked device. As such, it requires special timing considerations to ensure normal operation.

Primary timing factors to consider:

• Maximum clock frequency: the maximum operating clock frequency defined in GUID-4A56DF7F-1444-4E35-B7CC-61A9EDD30E36.html#GUID-4A56DF7F-1444-4E35-B7CC-61A9EDD30E36 is the maximum frequency at which the device is guaranteed to function. This value refers specifically to the triggering waveform, measuring from one trigger level to the next.
• Pulse duration: ensure that the triggering event duration is larger than the minimum pulse duration, as defined in the GUID-4A56DF7F-1444-4E35-B7CC-61A9EDD30E36.html#GUID-4A56DF7F-1444-4E35-B7CC-61A9EDD30E36.
• Setup time: ensure that the data has changed at least one setup time prior to the triggering event, as defined in the GUID-4A56DF7F-1444-4E35-B7CC-61A9EDD30E36.html#GUID-4A56DF7F-1444-4E35-B7CC-61A9EDD30E36.
• Hold time: ensure that the data remains in the desired state at least one hold time after the triggering event, as defined in the GUID-4A56DF7F-1444-4E35-B7CC-61A9EDD30E36.html#GUID-4A56DF7F-1444-4E35-B7CC-61A9EDD30E36.