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54F 74F574 Octal D-Type Flip-Flop with TRI-STATE Outputs
May 1995
54F 74F574
Octal D-Type Flip-Flop with TRI-STATE Outputs
General Description
The ’F574 is a high-speed low power octal flip-flop with a
buffered common Clock (CP) and a buffered common Out-
put Enable (OE) The information presented to the D inputs
is stored in the flip-flops on the LOW-to-HIGH Clock (CP)
transition
This device is functionally identical to the ’F374 except for
the pinouts
Features
Y
Y
Y
Y
Inputs and outputs on opposite sides of package
allowing easy interface with microprocessors
Useful as input or output port for microprocessors
Functionally identical to ’F374
TRI-STATE outputs for bus-oriented applications
Commercial
74F574PC
Military
Package
Number
N20A
Package Description
20-Lead (0 300 Wide) Molded Dual-In-Line
20-Lead Ceramic Dual-In-Line
20-Lead (0 300 Wide) Molded Small Outline JEDEC
20-Lead (0 300 Wide) Molded Small Outline EIAJ
20-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier Type C
54F574DM (Note 2)
74F574SC (Note 1)
74F574SJ (Note 1)
54F574FM (Note 2)
54F574LM (Note 2)
J20A
M20B
M20D
W20A
E20A
Note 1
Devices also available in 13 reel Use suffix
e
SCX and SJX
Note 2
Military grade device with environmental and burn-in processing Use suffix
e
DMQB FMQB and LMQB
Logic Symbols
IEEE IEC
TL F 9567 – 1
TL F 9567 – 4
Unit Loading Fan Out
54F 74F
Pin Names
D
0
–D
7
CP
OE
O
0
–O
7
Description
Data Inputs
Clock Pulse Input (Active LOW)
TRI-STATE Output Enable Input (Active LOW)
TRI-STATE Outputs
UL
HIGH LOW
10 10
10 10
10 10
150 40 (33 3)
Input I
IH
I
IL
Output I
OH
I
OL
20
mA
b
0 6 mA
20
mA
b
0 6 mA
20
mA
b
0 6 mA
b
3 mA 24 mA (20 mA)
TRI-STATE is a registered trademark of National Semiconductor Corporation
C
1995 National Semiconductor Corporation
TL F 9567
RRD-B30M75 Printed in U S A
Connection Diagrams
Pin Assignment
for DIP SOIC and Flatpak
Pin Assignment
for LCC
TL F 9567 – 3
TL F 9567– 2
Functional Description
The ’F574 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 times 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 OE is HIGH the
outputs go to the high impedance state Operation of the
OE input does not affect the state of the flip-flops
Function Table
Inputs
OE
H
H
H
H
L
L
L
L
CP
H
H
L
L
L
L
H
H
D
L
H
L
H
L
H
L
H
Internal
Q
NC
NC
L
H
L
H
NC
NC
Outputs
O
Z
Z
Z
Z
L
H
NC
NC
Hold
Hold
Load
Load
Data Available
Data Available
No Change in Data
No Change in Data
Function
H
e
HIGH Voltage Level
L
e
LOW Voltage Level
X
e
Immaterial
Z
e
High Impedance
L
e
LOW-to-HIGH Transition
NC
e
No Change
Logic Diagram
TL F 9567 – 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
Absolute Maximum Ratings
(Note 1)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
Plastic
V
CC
Pin Potential to
Ground Pin
b
65 C to
a
150 C
b
55 C to
a
125 C
b
55 C to
a
175 C
b
55 C to
a
150 C
b
0 5V to
a
7 0V
Recommended Operating
Conditions
Free Air Ambient Temperature
Military
Commercial
Supply Voltage
Military
Commercial
b
55 C to
a
125 C
0 C to
a
70 C
a
4 5V to
a
5 5V
a
4 5V to
a
5 5V
b
0 5V to
a
7 0V
Input Voltage (Note 2)
b
30 mA to
a
5 0 mA
Input Current (Note 2)
Voltage Applied to Output
in HIGH State (with V
CC
e
0V)
b
0 5V to V
CC
Standard Output
b
0 5V to
a
5 5V
TRI-STATE Output
Current Applied to Output
in LOW State (Max)
twice the rated I
OL
(mA)
Note 1
Absolute maximum ratings are values beyond which the device may
be damaged or have its useful life impaired Functional operation under
these conditions is not implied
Note 2
Either voltage limit or current limit is sufficient to protect inputs
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
CD
V
OH
Parameter
Min
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
54F 10% V
CC
54F 10% V
CC
74F 10% V
CC
74F 10% V
CC
74F 5% V
CC
74F 5% V
CC
54F 10% V
CC
74F 10% V
CC
54F
74F
54F
74F
54F
74F
74F
74F
4 75
3 75
b
0 6
54F 74F
Typ
Max
Units
V
08
b
1 2
V
CC
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
20
V
V
Min
I
IN
e b
18 mA
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
e
e
e
e
e
e
b
1 mA
b
3 mA
b
1 mA
b
3 mA
b
1 mA
b
3 mA
25
24
25
24
27
27
05
05
20 0
50
100
70
250
50
V
Min
V
OL
I
IH
I
BVI
I
CEX
V
ID
I
OD
I
IL
I
OZH
I
OZL
I
OS
I
ZZ
I
CCZ
Output LOW
Voltage
Input HIGH
Current
Input HIGH Current
Breakdown Test
Output HIGH
Leakage Current
Input Leakage
Test
Output Leakage
Circuit Current
Input LOW Current
V
mA
mA
mA
V
mA
mA
mA
mA
mA
mA
mA
Min
Max
Max
Max
00
00
Max
Max
Max
Max
0 0V
Max
I
OL
e
20 mA
I
OL
e
24 mA
V
IN
e
2 7V
V
IN
e
7 0V
V
OUT
e
V
CC
I
ID
e
1 9
mA
All Other Pins Grounded
V
IOD
e
150 mV
All Other Pins Grounded
V
IN
e
0 5V
V
OUT
e
2 7V
V
OUT
e
0 5V
V
OUT
e
0V
V
OUT
e
5 25V
V
O
e
HIGH Z
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Bus Drainage Test
Power Supply Current
55
3
b
60
50
b
50
b
150
500
86
AC Electrical Characteristics
74F
Symbol
Parameter
Min
f
max
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Maximum Clock Frequency
Propagation Delay
CP to O
n
Output Enable Time
Output Disable Time
100
25
25
30
30
15
15
53
53
55
60
33
28
85
85
90
90
55
55
T
A
e a
25 C
V
CC
e a
5 0V
C
L
e
50 pF
Typ
Max
54F
T
A
V
CC
e
Mil
C
L
e
50 pF
Min
60
25
25
25
25
15
15
95
95
10 5
10 5
70
70
Max
74F
T
A
V
CC
e
Com
C
L
e
50 pF
Min
70
25
25
25
25
15
15
85
85
10 0
10 0
65
65
Max
MHz
ns
Units
ns
AC Operating Requirements
74F
Symbol
Parameter
T
A
e a
25 C
V
CC
e a
5 0V
Min
t
s
(H)
t
s
(L)
t
h
(H)
t
h
(L)
t
w
(H)
t
w
(L)
Set-up Time HIGH or LOW
D
n
to CP
Hold Time HIGH or LOW
D
n
to CP
CP Pulse Width
HIGH or LOW
25
20
20
20
50
50
Max
54F
T
A
V
CC
e
Mil
Min
30
25
20
20
50
50
Max
74F
T
A
V
CC
e
Com
Min
25
20
20
20
50
50
ns
Max
Units
ns
4
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