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HD74HCT574

Hitachi Semiconductor
Part Number HD74HCT574
Manufacturer Hitachi Semiconductor
Description Octal D-type Flip-Flops (with 3-state outputs)
Published Mar 23, 2005
Detailed Description HD74HCT564/HD74HCT574 Octal D-type Flip-Flops (with 3-state outputs) Description These devices are positive edge trigge...
Datasheet PDF File HD74HCT574 PDF File

HD74HCT574
HD74HCT574

Overview
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 Compatibility as well as CMOS Output Compatibility High Speed Operation: tpd (D to Q, 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 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) 2 HD74HCT564/HD74HCT574 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) 3 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 4 HD74HCT564/HD74HCT574 HD74HCT574 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 Absolute Maximum Ratings Item Supply voltage range Input voltage Output voltage DC curre...


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