HD74HCT374

HD74HCT374/HD74HCT534 Octal D-type Flip-Flops (with 3-state outputs)/ Octal D-type Flip-Flops (with inverted 3-state outputs) Description These device are positive edge triggered flip-flops. The difference between HD74HCT374 and HD74HCT534 is only that the former is a true outputs and the latter is a false outputs. Data at the D inputs, meeting the setup and hold time requirements, are transferred to the 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 Compatibility as well as CMOS Output Compatibility High Speed Operation: tpd (Clock to Q) = 15 ns typ (CL = 50 pF) 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 Output Control L L L H X : Z : L X Clock D H L X X HD74HCT374 Q H L No change Z HD74HCT534 Q L H No change Z Irrelevant Off (high-impedance) state of a 3-state output. HD74HCT374/HD74HCT534 Pin Arrangement HD74HCT374 Output Control 1 1Q 1D 2D 2Q 3Q 3D 4D 4Q 2 3 4 5 6 7 8 9 20 VCC 19 8Q 18 8D 17 7D 16 7Q 15 6Q 14 6D 13 5D 12 5Q 11 Clock (Top view) GND 10 HD74HCT534 Output Control 1 1Q 1D 2D 2Q 3Q 3D 4D 4Q 2 3 4 5 6 7 8 9 20 VCC 19 8Q 18 8D 17 7D...