The HD74ALVCH162721’s twenty flip flops are edge triggered D-type flip flops with qualified clock storage.
On the positive transition of the clock (CLK) input, the device provides true data at the Q outputs, provided that the clock enable (CLKEN) input is low.
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HD74ALVCH162721
3.3-V 20-bit Flip Flops with 3-state Outputs
REJ03D0044-0400Z (Previous ADE-205-184B (Z) )
Rev.4.00 Oct.02.2003
Description
The HD74ALVCH162721’s twenty flip flops are edge triggered D-type flip flops with qualified clock storage. On the positive transition of the clock (CLK) input, the device provides true data at the Q outputs, provided that the clock enable (CLKEN) input is low. If CLKEN is high, no data is stored. A buffered output enable (OE) input can be used to place the twenty outputs in either a normal logic state (high or low level) or a high impedance state. In the high impedance state, the outputs neither load nor drive the bus lines significantly.
HD74ALVCH162721 Datasheet
