74AC74 • 74ACT74 Dual D-Type Positive Edge-Triggered Flip-Flop
November 1988
Revised August 1999
74AC74 • 74ACT74
Dual D-Type Positive Edge-Triggered Flip-Flop
General Description
The AC/ACT74 is a dual D-type flip-flop with Asynchronous
Clear and Set inputs and complementary (Q, Q) outputs.
Information at the input is transferred to the outputs on the
positive edge of the clock pulse. Clock triggering occurs at
a voltage level of the clock pulse and is not directly related
to the transition time of the positive-going pulse. After the
Clock Pulse input threshold voltage has been passed, the
Data input is locked out and information present will not be
transferred to the outputs until the next rising edge of the
Clock Pulse input.
Asynchronous Inputs:
LOW input to S
D
(Set) sets Q to HIGH level
LOW input to C
D
(Clear) sets Q to LOW level
Clear and Set are independent of clock
Simultaneous LOW on C
D
and S
D
makes both Q and Q
HIGH
Features
s
I
CC
reduced by 50%
s
Output source/sink 24 mA
s
ACT74 has TTL-compatible inputs
Ordering Code:
Order Number
74AC74SC
74AC74SJ
74AC74MTC
74AC74PC
74ACT74SC
74ACT74SJ
74ACT74MTC
74ACT74PC
Package Number
M14A
M14D
MTC14
N14A
M14A
M14D
MTC14
N14A
Package Description
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150” Narrow Body
14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150” Narrow Body
14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram
Pin Assignment for DIP,
SOIC and TSSOP
Pin Descriptions
Pin Names
D
1
, D
2
CP
1
, CP
2
C
D1
, C
D2
S
D1
, S
D2
Q
1
, Q
1
, Q
2
, Q
2
Description
Data Inputs
Clock Pulse Inputs
Direct Clear Inputs
Direct Set Inputs
Outputs
FACT™ is a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation
DS009920
www.fairchildsemi.com
74AC74 • 74ACT74
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
CC
)
DC Input Diode Current (I
IK
)
V
I
= −0.5V
V
I
=
V
CC
+
0.5V
DC Input Voltage (V
I
)
DC Output Diode Current (I
OK
)
V
O
= −0.5V
V
O
=
V
CC
+
0.5V
DC Output Voltage (V
O
)
DC Output Source
or Sink Current (I
O
)
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
Storage Temperature (T
STG
)
Junction Temperature (T
J
)
PDIP
140°C
±50
mA
−65°C
to
+150°C
±50
mA
−20
mA
+20
mA
−0.5V
to V
CC
+
0.5V
−20
mA
+20
mA
−0.5V
to V
CC
+
0.5V
−0.5V
to
+7.0V
Recommended Operating
Conditions
Supply Voltage (V
CC
)
AC
ACT
Input Voltage (V
I
)
Output Voltage (V
O
)
Operating Temperature (T
A
)
Minimum Input Edge Rate (∆V/∆t)
AC Devices
V
IN
from 30% to 70% of V
CC
V
CC
@ 3.3V, 4.5V, 5.5V
Minimum Input Edge Rate (∆V/∆t)
ACT Devices
V
IN
from 0.8V to 2.0V
V
CC
@ 4.5V, 5.5V
125 mV/ns
Note 1:
Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, with-
out exception, to ensure that the system design is reliable over its power
supply, temperature, and output/input loading variables. Fairchild does not
recommend operation of FACT™ circuits outside databook specifications.
2.0V to 6.0V
4.5V to 5.5V
0V to V
CC
0V to V
CC
−40°C
to
+85°C
125 mV/ns
DC Electrical Characteristics for AC
Symbol
V
IH
Parameter
Minimum HIGH
Level Input
Voltage
V
IL
Maximum LOW
Level Input
Voltage
V
OH
Minimum HIGH
Level Output
Voltage
V
CC
(V)
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
V
OL
Maximum LOW
Level Output
Voltage
3.0
4.5
5.5
3.0
4.5
5.5
I
IN
(Note 4)
I
OLD
I
OHD
I
CC
(Note 4)
Maximum Input
Leakage Current
Minimum Dynamic
Output Current (Note 3)
Maximum Quiescent
Supply Current
5.5
5.5
5.5
5.5
2.0
0.002
0.001
0.001
T
A
= +25°C
Typ
1.5
2.25
2.75
1.5
2.25
2.75
2.99
4.49
5.49
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.56
3.86
4.86
0.1
0.1
0.1
0.36
0.36
0.36
±
0.1
T
A
= −40°C
to
+85°C
Guaranteed Limits
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
V
IN
=
V
IL
or V
IH
2.46
3.76
4.76
0.1
0.1
0.1
V
IN
=
V
IL
or V
IH
0.44
0.44
0.44
±
1.0
75
−75
20.0
µA
mA
mA
µA
V
I
OL
=
12 mA
I
OL
=
24 mA
I
OL
=
24 mA (Note 2)
V
I
=
V
CC
, GND
V
OLD
=
1.65V Max
V
OHD
=
3.85V Min
V
IN
=
V
CC
or GND
V
V
I
OH
= −12
mA
I
OH
= −24
m
I
OH
= −24
m (Note 2)
I
OUT
=
50
µA
V
I
OUT
= −50 µA
V
V
OUT
=
0.1V
or V
CC
−
0.1V
V
V
OUT
=
0.1V
or V
CC
−
0.1V
Units
Conditions
Note 2:
All outputs loaded; thresholds on input associated with output under test.
Note 3:
Maximum test duration 2.0 ms, one output loaded at a time.
Note 4:
I
IN
and I
CC
@ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V V
CC
.
3
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74AC74 • 74ACT74
DC Electrical Characteristics for ACT
Symbol
V
IH
V
IL
V
OH
Parameter
Minimum HIGH Level
Input Voltage
Maximum LOW Level
Output Voltage
Minimum HIGH Level
Output Voltage
V
CC
(V)
4.5
5.5
4.5
5.5
4.5
5.5
4.5
5.5
V
OL
Maximum LOW Level
Output Voltage
4.5
5.5
4.5
5.5
I
IN
(Note 4)
I
CCT
I
OLD
I
OHD
I
CC
(Note 4)
Maximum Input
Leakage Current
Maximum
I
CC
/Input
Minimum Dynamic
Output Current (Note 6)
Maximum Quiescent
Supply Current
5.5
5.5
5.5
2.0
75
−75
20.0
mA
mA
µA
V
OLD
=
1.65V Max
V
OHD
=
3.85V Min
V
IN
=
V
CC
or GND
5.5
0.6
1.5
mA
V
I
=
V
CC
−
2.1V
5.5
0.001
0.001
T
A
= +25°C
Typ
1.5
1.5
1.5
1.5
4.49
5.49
2.0
2.0
0.8
0.8
4.4
5.4
3.86
4.86
0.1
0.1
0.36
0.36
±0.1
T
A
= −40°C
to
+85°C
Guaranteed Limits
2.0
2.0
0.8
0.8
4.4
5.4
V
IN
=
V
IL
or V
IH
3.76
4.76
0.1
0.1
V
IN
=
V
IL
or V
IH
0.44
0.44
±1.0
V
µA
I
OL
=
24 mA
I
OL
=
24 mA (Note 5)
V
I
=
V
CC
, GND
V
V
I
OH
= −24
mA
I
OH
= −24
mA (Note 5)
I
OUT
=
50
µA
V
V
V
V
OUT
=
0.1V
or V
CC
−
0.1V
V
OUT
=
0.1V
or V
CC
−
0.1V
I
OUT
= −50 µA
Units
Conditions
Note 5:
All outputs loaded; thresholds on input associated with output under test.
Note 6:
Maximum test duration 2.0 ms, one output loaded at a time.
AC Electrical Characteristics for AC
V
CC
Symbol
Parameter
(V)
(Note 7)
f
max
Maximum Clock
Frequency
t
PLH
Propagation Delay
C
Dn
or S
Dn
to Q
n
or Q
n
t
PHL
Propagation Delay
C
Dn
or S
Dn
to Q
n
or Q
n
t
PLH
Propagation Delay
CP
n
to Q
n
or Q
n
t
PHL
Propagation Delay
CP
n
to Q
n
or Q
n
Note 7:
Voltage Range 3.3 is 3.3V
±
0.3V
Voltage Range 5.0 is 5.0V
±
0.5V
T
A
= +25°C
C
L
=
50 pF
Min
100
140
3.5
2.5
4.0
3.0
4.5
3.5
3.5
2.5
Typ
125
160
8.0
6.0
10.5
8.0
8.0
6.0
8.0
6.0
12.0
9.0
12.0
9.5
13.5
10.0
14.0
10.0
Max
T
A
= −40°C
to
+85°C
C
L
=
50 pF
Min
95
125
2.5
2.0
3.5
2.5
4.0
3.0
3.5
2.5
13.0
10.0
13.5
10.5
16.0
10.5
14.5
10.5
Max
MHz
Units
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
ns
ns
ns
ns
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4
74AC74 • 74ACT74
AC Operating Requirements for AC
V
CC
Symbol
Parameter
(V)
(Note 8)
t
S
Set-up Time, HIGH or LOW
D
n
to CP
n
t
H
Hold Time, HIGH or LOW
D
n
to CP
n
t
W
CP
n
or C
Dn
or S
Dn
Pulse Width
t
rec
Recovery Time
C
Dn
or S
Dn
to CP
Note 8:
Voltage Range 3.3 is 3.3V
±
0.3V
Voltage Range 5.0 is 5.0V
±
0.5V
T
A
= +25°C
C
L
=
50 pF
Typ
1.5
1.0
−2.0
−1.5
3.0
2.5
−2.5
−2.0
T
A
= −40°C
to
+85°C
C
L
=
50 pF
Guaranteed Minimum
4.0
3.0
0.5
0.5
5.5
4.5
0
0
4.5
3.0
0.5
0.5
7.0
5.0
0
0
ns
Units
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
ns
ns
ns
AC Electrical Characteristics for ACT
V
CC
Symbol
Parameter
(V)
(Note 9)
f
max
Maximum Clock
Frequency
t
PLH
Propagation Delay
C
Dn
or S
Dn
to Q
n
or Q
n
t
PHL
Propagation Delay
C
Dn
or S
Dn
to Q
n
or Q
n
t
PLH
Propagation Delay
CP
n
to Q
n
or Q
n
t
PHL
Propagation Delay
CP
n
to Q
n
or Q
n
Note 9:
Voltage Range 5.0 is 5.0V
±0.5V
T
A
= +25°C
C
L
=
50 pF
Min
145
Typ
210
Max
T
A
= −40°C
to
+85°C
C
L
=
50 pF
Min
125
Max
MHz
Units
5.0
5.0
3.0
5.5
9.5
2.5
10.5
ns
5.0
3.0
6.0
10.0
3.0
11.5
ns
5.0
4.0
7.5
11.0
4.0
13.0.
ns
5.0
3.5
6.0
10.0
3.0
11.5
ns
AC Operating Requirements for ACT
V
CC
Symbol
Parameter
(V)
(Note 10)
t
S
t
H
t
W
t
rec
Set-up Time, HIGH or LOW
D
n
to CP
n
Hold Time, HIGH or LOW
D
n
to CP
n
CP
n
or C
Dn
or S
Dn
Pulse Width
Recovery Time
C
Dn
or S
Dn
to CP
Note 10:
Voltage Range 5.0 is 5.0V
±0.5V
T
A
= +25°C
C
L
=
50 pF
Typ
1.0
−0.5
3.0
1.0
T
A
= −40°C
to
+85°C
C
L
=
50 pF
Guaranteed Minimum
3.5
1.0
ns
ns
Units
5.0
5.0
5.0
3.0
−2.5
5.0
6.0
ns
5.0
0
0
ns
Capacitance
Symbol
C
IN
C
PD
Parameter
Input Capacitance
Power Dissipation Capacitance
Typ
4.5
35.0
Units
pF
pF
V
CC
=
OPEN
V
CC
=
5.0V
Conditions
5
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