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HD74LVC574A
Octal D-type Flip Flops with 3-state Outputs
ADE-205-117B(Z) 3rd Edition December 1996 Description
The HD74LVC574A has eight edge trigger D type flip flops with three state outputs in a 20 pin package. Data at the D inputs meeting set up requirements, are transferred to the Q outputs on positive going transitions of the clock input. When the clock input goes low, data at the D inputs will be retained at the outputs until clock input returns high again. When a high logic level is applied to the output control input, all outputs go to a high impedance state, regardless of what signals are present at the other inputs and the state of the storage elements.