74F374 Octal D-Type Flip-Flop with 3-STATE Outputs
May 1988
Revised September 2000
74F374
Octal D-Type Flip-Flop with 3-STATE Outputs
General Description
The 74F374 is a high-speed, low-power octal D-type flip-
flop featuring separate D-type inputs for each flip-flop and
3-STATE outputs for bus-oriented applications. A buffered
Clock (CP) and Output Enable (OE) are common to all flip-
flops.
Features
s
Edge-triggered D-type inputs
s
Buffered positive edge-triggered clock
s
3-STATE outputs for bus-oriented applications
s
Guaranteed 4000V minimum ESD protection
Ordering Code:
Order Number
74F374SC
74F374SJ
74F374MSA
74F374PC
Package Number
M20B
M20D
MSA20
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
© 2000 Fairchild Semiconductor Corporation
DS009524
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74F374
Unit Loading/Fan Out
U.L.
Pin Names
D
0
–D
7
CP
OE
O
0
–O
7
Data Inputs
Clock Pulse Input (Active Rising Edge)
3-STATE Output Enable Input (Active LOW)
3-STATE Outputs
Description
HIGH/LOW
1.0/1.0
1.0/1.0
1.0/1.0
Input I
IH
/I
IL
Output I
OH
/I
OL
20
µ
A/
−
0.6 mA
20
µ
A/
−
0.6 mA
20
µ
A/
−
0.6 mA
150/40 (33.3)
−
3 mA/24 mA (20 mA)
Functional Description
The 74F374 consists of eight edge-triggered flip-flops with
individual D-type inputs and 3-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
requirements 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. Opera-
tion of the OE input does not affected the state of the flip-
flops.
Truth Table
Inputs
D
n
H
L
X
CP
Internal
OE
L
L
H
Register
H
L
X
Output
O
n
H
L
Z
X
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
=
LOW-to-HIGH Clock Transition
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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2
74F374
Absolute Maximum Ratings
(Note 1)
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
V
CC
Pin Potential to Ground Pin
Input Voltage (Note 2)
Input Current (Note 2)
Voltage Applied to Output
in HIGH State (with V
CC
=
0V)
Standard Output
3-STATE Output
Current Applied to Output
in LOW State (Max)
ESD Last Passing Voltage (Min)
twice the rated I
OL
(mA)
4000V
−
65
°
C to
+
150
°
C
−
55
°
C to
+
125
°
C
−
55
°
C to
+
150
°
C
−
0.5V to
+
7.0V
−
0.5V to
+
7.0V
−
30 mA to
+
5.0 mA
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0
°
C to
+
70
°
C
+
4.5V to
+
5.5V
−
0.5V to V
CC
−
0.5V to
+
5.5V
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
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
10% V
CC
10% V
CC
5% V
CC
5% V
CC
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
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Bus Drainage Test
Power Supply Current
55
−60
4.75
3.75
−0.6
50
−50
−150
500
86
10% V
CC
2.5
2.4
2.7
2.7
0.5
5.0
7.0
50
V
µA
µA
µA
V
µA
mA
µA
µA
mA
µA
mA
Min
Max
Max
Max
0.0
0.0
Max
Max
Max
Max
0.0V
Max
V
Min
Min
2.0
0.8
−1.2
Typ
Max
Units
V
V
V
Min
V
CC
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
I
IN
= −18
mA
I
OH
= −1
mA
I
OH
= −3
mA
I
OH
= −1
mA
I
OH
= −3
mA
I
OL
=
24 mA
V
IN
=
2.7V
V
IN
=
7.0V
V
OUT
=
V
CC
I
ID
=
1.9
µA
All Other Pins Grounded
V
IOD
=
150 mV
All Other Pins Grounded
V
IN
=
0.5V
V
OUT
=
2.7V
V
OUT
=
0.5V
V
OUT
=
0V
V
OUT
=
5.25V
V
O
=
HIGH Z
3
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74F374
AC Electrical Characteristics
T
A
= +25°C
Symbol
Parameter
Min
f
MAX
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Output Disable Time
Maximum Clock Frequency
Propagation Delay
CP to O
n
Output Enable Time
100
4.0
4.0
2.0
2.0
2.0
1.5
V
CC
= +5.0V
C
L
=
50 pF
Typ
140
6.5
6.5
9.0
5.8
5.3
4.3
8.5
8.5
11.5
7.5
7.0
5.5
Max
T
A
= −55°C
to
+125°C
V
CC
= +5.0V
C
L
=
50 pF
Min
60
4.0
4.0
2.0
2.0
2.0
1.5
10.5
11.0
14.0
10.0
8.0
7.5
Max
T
A
=
0°C to
+70°C
V
CC
= +5.0V
C
L
=
50 pF
Min
70
4.0
4.0
2.0
2.0
2.0
1.5
10.0
10.0
12.5
8.5
8.0
6.5
ns
Max
MHz
ns
Units
AC Operating Requirements
T
A
= +25°C
Symbol
Parameter
V
CC
= +5.0V
Min
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
W
(H)
t
W
(L)
Setup Time, HIGH or LOW
D
n
to CP
Hold Time, HIGH or LOW
D
n
to CP
CP Pulse Width
HIGH or LOW
2.0
2.0
2.0
2.0
7.0
6.0
Max
T
A
= −55°C
to
+125°C
V
CC
= +5.0V
Min
2.5
2.0
2.0
2.5
7.0
6.0
Max
T
A
=
0°C to
+70°C
V
CC
= +5.0V
Min
2.0
2.0
2.0
2.0
7.0
6.0
ns
ns
Max
Units
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4
74F374
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
5
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