HIT HD74HC574, HD74HC564 Datasheet

HD74HC564/HD74HC574

Octal D-type Flip-Flops (with 3-state outputs)

Description

These devices are positive edge triggered flip-flops. The difference between HD74HC564 and
HD74HC574 is only that the former has inverting outputs and the latter has noninvertering 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 cotrol
(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

• High Speed Operation: tpd (Clock to Output) = 13 ns typ (CL = 50 pF)

• High Output Current: Fanout of 15 LSTTL Loads

• Wide Operating Voltage: VCC = 2 to 6 V

• Low Input Current: 1 µA max

• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)

Function Table

Outputs

Output Control Clock Data HD74HC564 HD74HD574

L HL H
L LHL
LL XQ
HX XZZ

Q

: level of Q before the indicated Steady-sate input conditions were established.

0

Q

: complement of Q0 or level of Q before the indicated Steady-state input Conditions were established.

0

0

Q

0

HD74HC564/HD74HC574

(

)

Pin Arrangement

HD74HC564

Output

Control

1D

2D

3D

4D

5D

6D

7D

8D

GND

10

1

2

OE

3

D Q

4

OE

5

D Q

6

OE

7

D Q

8

OE

9

D Q

Top view

OE

D Q

OE

D Q

OE

D Q

OE

D Q

20

19

18

17

16

15

14

13

12

11

V

CC

1Q

2Q

3Q

4Q

5Q

6Q

7Q

8Q

Clock

2

HD74HC574

(

)

HD74HC564/HD74HC574

Output

Control

1D

2D

3D

4D

5D

6D

7D

8D

GND

1

2

3

4

5

6

7

8

9

10

OE

DQ

OE

DQ

OE

DQ

OE

DQ

Top view

OE

DQ

OE

DQ

OE

DQ

OE

DQ

20

19

18

17

16

15

14

13

12

11

V

CC

1Q

2Q

3Q

4Q

5Q

6Q

7Q

8Q

Clock

Absolute Maximum Ratings

Item Symbol Rating Unit

Supply voltage range V
Input voltage V
Output voltage V
Output current I
DC current drain per VCC , GND ICC, I
DC input diode current I
DC output diode current I
Power Dissipation per package P

CC

IN

OUT

OUT

GND

IK

OK

T

Storage temperature Tstg –65 to +150 °C

–0.5 to +7.0 V
–0.5 to VCC + 0.5 V
–0.5 to VCC + 0.5 V

±35 mA
±75 mA
±20 mA
±20 mA

500 mW

3

HD74HC564/HD74HC574

Block Diagram

HD74HC564

1D

2D

3D

4D

5D

6D

D

Q

C

C

D

Q

C

C

D

Q

C

C

D

Q

C

C

D

Q

C

C

D

Q

C

C

1Q

2Q

3Q

4Q

5Q

6Q

7D

8D

CLK

OC

4

D

Q

C

C

D

Q

C

C

7Q

8Q