54AC574 Datasheet | National Semiconductor

.. - 54ACT574 Octal D-Type Flip-Flop with TRI-STATE Outputs September 1998 - 54ACT574 Octal D-Type Flip-Flop with TRI-STATE ® Outputs General Description The ’AC/’ACT574 is a high-speed, low power octal flip-flop with a buffered mon Clock (CP) and a buffered mon Output Enable (OE). The information presented to the D inputs is stored in the flip-flops on the LOW-to-HIGH Clock (CP) transition. The ’AC/’ACT574 is functionally identical to the ’AC/’ACT374 except for the pinouts. Features n ICC and IOZ reduced by 50% n Inputs and outputs on opposite sides of package allowing easy interface with microprocessors n Useful as input or output port for microprocessors n Functionally identical to ’AC/’ACT374 n TRI-STATE outputs for bus-oriented applications n Outputs source/sink 24 m A n ’ACT574 has TTL-patible inputs n Standard Microcircuit Drawing (SMD) - ’ACT574: 5962-89601 Logic Symbols IEEE/IEC DS100256-1 DS100256-4 Pin Names D0- D7 CP OE O0- O7 Data Inputs Description Clock Pulse Input TRI-STATE Output Enable Input TRI-STATE Outputs TRI-STATE ® is a registered trademark of National Semiconductor Corporation. FACT™ is a trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100256 .national. Connection Diagrams Pin Assignment for DIP, and Flatpak Pin Assignment for LCC DS100256-2 DS100256-3 Functional Description The ’AC/’ACT574 consists of eight edge-triggered flip-flops with individual D-type inputs and TRI-STATE true outputs. The buffered clock and buffered Output Enable are mon to all flip-flops. The eight flip-flops will store the state of their individual D inputs that meet the setup and hold time requirements on the LOW-to-HIGH Clock (CP) transition. With the Output Enable (OE) LOW, the contents of the eight flip-flops are available at the outputs. When OE is HIGH, the outputs go to the high impedance state. Operation of the OE input does not affect the state of...