TECHNICAL DATA
1
Octal 3-State Noninverting D Flip-Flop
The device is comprised of eight edge-triggered D-Type flip-flops.
On the positive transition of the clock, the Q outputs will be set to the
logic states that were set up at the D inputs.
A buffered output control input can be used to place the eight
outputs in either a normal logic state (high or low logic levels) or a
high-impedance state. In the high-impedance state the outputs neither
load nor drive the bus lines significantly.
Switching specifications at 50 pF
Switching specifications guaranteed over full temperature and V
CC
range
TRI-STATE buffer-type outputs drive bus lines directly
IN74ALS574
ORDERING INFORMATION
IN74ALS574N Plastic
IN74ALS574DW SOIC
T
A
= -10
to 70
C
for all packages
FUNCTION TABLE
Inputs
Output
Output
Enable
Clock
D
Q
L
H
H
L
L
L
L
L,H,
X
no
change
H
X
X
Z
X = don't care
Z = high impedance
LOGIC DIAGRAM
PIN 20=V
CC
PIN 10 = GND
PIN ASSIGNMENT
IN74ALS574
2
MAXIMUM RATINGS
*
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
7.0
V
V
IN
Input Voltage
7.0
V
V
OUT
Output Voltage (Referenced to GND)
5.5
V
Tstg
Storage Temperature Range
-65 to +150
C
*
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Max
Unit
V
CC
Supply Voltage
4.5
5.5
V
V
IH
High Level Input Voltage
2.0
V
V
IL
Low Level Input Voltage
0.8
V
I
OH
High Level Output Current
-2.6
mA
I
OL
Low Level Output Current
24
mA
T
A
Ambient Temperature Range
-10
+70
C
DC ELECTRICAL CHARACTERISTICS over full operating conditions
Guaranteed Limit
Symbol
Parameter
Test Conditions
Min
Max
Unit
V
IK
Input Clamp Voltage
V
CC
= min, I
IN
= -18 mA
-1.5
V
V
OH
High Level Output Voltage
V
CC
= min, I
OH
= -0.4 mA
2.5
V
V
CC
= min, I
OH
= -2.6 mA
2.4
V
OL
Low Level Output Voltage
V
CC
= min, I
OL
= 12 mA
0.4
V
V
CC
= min, I
OL
= 24 mA
0.5
I
OZH
Output Off Current HIGH
V
CC
= max, V
OUT
= 2.7 V
20
A
I
OZL
Output Off Current LOW
V
CC
= max, V
OUT
= 0.4 V
-20
A
I
IH
High Level Input Current
V
CC
= max, V
IN
= 2.7 V
20
A
V
CC
= max, V
IN
= 7.0 V
0.1
mA
I
IL
Low Level Input Current
V
CC
= max, V
IN
= 0.4 V
-0.1
mA
I
O
Output Short Circuit Current
V
CC
= max, V
O
= 2.25 V
-30
-112
mA
I
CC
Supply Current
V
CC
= max
Outputs Low
17
mA
Outputs High
24
3-State
(High Z)
27
IN74ALS574
3
AC ELECTRICAL CHARACTERISTICS over full operating conditions
(V
CC
= 5.0 V
10%, C
L
= 50 pF, R
L1
= R
L2
= 500
, Input t
r
= t
f
= 2.0 ns)
Guaranteed Limit
Symbol
Parameter
Min
Max
Unit
f
max
Maximum Clock Frequency
35
MHz
t
PLH
, t
PHL
Propagation Delay Time, from Clock to Output
14
ns
t
PZH
, t
PZL
Propagation Delay Time, from Enable to Any Q
18
ns
t
PHZ
Propagation Delay Time, from Enable to Any Q
32
ns
t
PLZ
Propagation Delay Time, from Enable to Any Q
18
ns
t
w
Pulse Duratio, Enable, 25
C at 5.0 V
16.5
ns
t
su
Data Setup Time before Clock
15
ns
t
h
Data Hold Time after Clock
4
ns
t
PZL
, t
PLZ
- S1 closed
t
PZH
, t
PHZ
- S1 opened
Figure 1. Switching Waveforms
Figure 2. Switching Waveforms
Figure 3. Switching Waveforms
IN74ALS574
4
* Includes all probe and jig capacitance.
* Includes all probe and jig capacitance.
Figure 3. Test Circuit
Figure 4. Test Circuit
EXPANDED LOGIC DIAGRAM
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