HD74HCT574 Datasheet | Hitachi Semiconductor

HD74HCT564/HD74HCT574 Octal D-type Flip-Flops (with 3-state outputs) Description These devices are positive edge triggered flip-flops. The difference between HD74HCT564 and HD74HCT574 is only that the former has inverting outputs and the latter has non-inverting outputs. Data at the D inputs, meeting the set-up and hold time requirements, are transferred to the Q or Q outputs on positive going transitions of the clock (CK) input. When a high logic level is applied to the output control (OC) 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. Features - - - - - - LSTTL Output Logic Level patibility as well as CMOS Output patibility High Speed Operation: tpd (D to Q, Q) = 15 ns typ (CL = 50 p F) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 4.5 to 5.5 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Outputs Output Control L L L H L X Clock Data H L X X HD74HCT564 L H Q0 Z HD74HCT574 H L Q0 Z HD74HCT564/HD74HCT574 Pin Arrangement HD74HCT564 Output Control 1 1D 2 2D 3 3D 4 4D 5 5D 6 6D 7 7D 8 8D 9 GND 10 OE D Q OE D Q OE D Q OE D Q OE D Q OE D Q OE D Q OE D Q 20 VCC 19 1Q 18 2Q 17 3Q 16 4Q 15 5Q 14 6Q 13 7Q 12 8Q 11 Clock (Top view) HD74HCT564/HD74HCT574 Output Control 1 1D 2 2D 3 3D 4 4D 5 5D 6 6D 7 7D 8 8D 9 GND 10 OE D Q OE D Q OE D Q OE D Q OE D Q OE D Q OE D Q OE D Q 20 VCC 19 1Q 18 2Q 17 3Q 16 4Q 15 5Q 14 6Q 13 7Q 12 8Q 11 Clock (Top view) HD74HCT564/HD74HCT574 Block Diagram HD74HCT564 1D 2D 3D D C Q C D C Q C D C Q C D C Q C D C Q C D C Q C D C Q C D C Q C 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q 4D 5D 6D 7D 8D CLK OC HD74HCT564/HD74HCT574...