Unit LoadingFan Out

Pin

54F74F

Names

Description

UL

HIGHLOW

1010

CP

Clock Pulse Input (Active Rising Edge)

1010

OE

TRI-STATE Output Enable Input (Active LOW)

1010

15040 (333)

b

3 mA24 mA (20 mA)

Functional Description

The ’F374 consists of eight edge-triggered flip-flops with in-

dividual D-type inputs and TRI-STATE true outputs The

buffered clock and buffered Output Enable are common to

all flip-flops The eight flip-flops will store the state of their

individual D inputs that meet the setup and hold time re-

quirements 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 the OE is HIGH the

outputs go to the high impedance state Operation of the

OE input does not affected the state of the flip-flops

Truth Table

Inputs

Internal

Output

CP

OE

Register

H

L

LH

H

L

L

LL

L

XX

H

X

Z

Logic Diagram

TLF9524 – 5

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays

2