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Электронный компонент: 54ACT74FMQB

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54AC74/54ACT74
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 trans-
ferred 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
n
I
CC
reduced by 50%
n
Output source/sink 24 mA
n
'ACT74 has TTL-compatible inputs
n
Standard Microcircuit Drawing (SMD)
-- 'AC74: 5962-88520
-- 'ACT74: 5962-87525
n
54AC74 now qualified to 300Krad RHA designation,
refer to the SMD for more information
Logic Symbols
10026601
IEEE/IEC
10026603
10026602
Pin Names
Description
D
1
, D
2
Data Inputs
CP
1
, CP
2
Clock Pulse Inputs
C
D1
, C
D2
Direct Clear Inputs
S
D1
, S
D2
Direct Set Inputs
Q
1
, Q
1
, Q
2
, Q
2
Outputs
FACT
is a registered trademark of Fairchild Semiconductor Corporation.
July 2003
54AC74/54ACT74
Dual
D-T
ype
Positive
Edge-T
riggered
Flip-Flop
2003 National Semiconductor Corporation
DS100266
www.national.com
Connection Diagrams
Pin Assignment for DIP
and Flatpak
Pin Assignment for LCC
10026604
10026605
Truth Table
(Each Half)
Inputs
Outputs
S
D
C
D
CP
D
Q
Q
L
H
X
X
H
L
H
L
X
X
L
H
L
L
X
X
H
H
H
H
N
H
H
L
H
H
N
L
L
H
H
H
L
X
Q
0
Q
0
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
N
= LOW-to-HIGH Clock Transition
Q
0
(Q
0
) = Previous Q(Q) before LOW-to-HIGH Transition of Clock
Logic Diagram
10026606
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
54AC74/54ACT74
www.national.com
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.
Supply Voltage (V
CC
)
-0.5V to +7.0V
DC Input Diode Current (I
IK
)
V
I
= -0.5V
-20 mA
V
I
= V
CC
+ 0.5V
+20 mA
DC Input Voltage (V
I
)
-0.5V to V
CC
+ 0.5V
DC Output Diode Current (I
OK
)
V
O
= -0.5V
-20 mA
V
O
= V
CC
+ 0.5V
+20 mA
DC Output Voltage (V
O
)
-0.5V to V
CC
+ 0.5V
DC Output Source
or Sink Current (I
O
)
50 mA
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
50 mA
Storage Temperature (T
STG
)
-65C to +150C
Junction Temperature (T
J
)
CDIP
175C
Recommended Operating
Conditions
Supply Voltage (V
CC
)
'AC
2.0V to 6.0V
'ACT
4.5V to 5.5V
Input Voltage (V
I
)
0V to V
CC
Output Voltage (V
O
)
0V to V
CC
Operating Temperature (T
A
)
54AC/ACT
-55C to +125C
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
125 mV/ns
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, without
exception, to ensure that the system design is reliable over its power supply,
temperature, and output/input loading variables. National does not recom-
mend operation of FACT
circuits outside databook specifications.
DC Characteristics for 'AC Family Devices
54AC
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to +125C
Guaranteed
Limits
V
IH
Minimum High
3.0
2.1
V
OUT
= 0.1V
Level Input
4.5
3.15
V
or V
CC
- 0.1V
Voltage
5.5
3.85
V
IL
Maximum Low
3.0
0.9
V
OUT
= 0.1V
Level Input
4.5
1.35
V
or V
CC
- 0.1V
Voltage
5.5
1.65
V
OH
Minimum High
3.0
2.9
I
OUT
= -50 A
Level Output
4.5
4.4
V
Voltage
5.5
5.4
(Note 2)
V
IN
= V
IL
or V
IH
3.0
2.4
-12 mA
4.5
3.7
V
I
OH
-24 mA
5.5
4.7
-24 mA
V
OL
Maximum Low
3.0
0.1
I
OUT
= 50 A
Level Output
4.5
0.1
V
Voltage
5.5
0.1
(Note 2)
V
IN
= V
IL
or V
IH
54AC74/54ACT74
www.national.com
3
DC Characteristics for 'AC Family Devices
(Continued)
54AC
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to +125C
Guaranteed
Limits
3.0
0.5
12 mA
4.5
0.5
V
I
OL
24 mA
5.5
0.5
24 mA
I
IN
Maximum Input
5.5
1.0
A
V
I
= V
CC
, GND
Leakage Current
I
OLD
(Note 3) Minimum
Dynamic Output
Current
5.5
50
mA
V
OLD
= 1.65V Max
I
OHD
5.5
-50
mA
V
OHD
= 3.85V Min
I
CC
Maximum Quiescent
5.5
40.0
A
V
IN
= V
CC
Supply Current
or GND
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
.
I
CC
for 54AC @ 25C is identical to 74AC @ 25C.
DC Characteristics for 'ACT Family Devices
54ACT
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to +125C
Guaranteed
Limits
V
IH
Minimum High
Level Input
Voltage
4.5
2.0
V
V
OUT
= 0.1V
5.5
2.0
or V
CC
- 0.1V
V
IL
Maximum Low
Level Input
Voltage
4.5
0.8
V
V
OUT
= 0.1V
5.5
0.8
or V
CC
- 0.1V
V
OH
Minimum High
Level Output
Voltage
4.5
4.4
V
I
OUT
= -50 A
5.5
5.4
(Note 5)
V
IN
= V
IL
or V
IH
4.5
3.70
V
I
OH
-24 mA
5.5
4.70
-24 mA
V
OL
Maximum Low
Level Output
Voltage
4.5
0.1
V
I
OUT
= 50 A
5.5
0.1
(Note 5)
V
IN
= V
IL
or V
IH
4.5
0.50
V
I
OL
24 mA
5.5
0.50
24 mA
I
IN
Maximum Input
5.5
1.0
A
V
I
= V
CC
, GND
Leakage Current
I
CCT
Maximum
5.5
1.6
mA
V
I
= V
CC
- 2.1V
I
CC
/Input
I
OLD
(Note 6) Minimum
Dynamic Output
Current
5.5
50
mA
V
OLD
= 1.65V Max
I
OHD
5.5
-50
mA
V
OHD
= 3.85V Min
54AC74/54ACT74
www.national.com
4
DC Characteristics for 'ACT Family Devices
(Continued)
54ACT
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to +125C
Guaranteed
Limits
I
CC
Maximum Quiescent
5.5
40.0
A
V
IN
= V
CC
Supply Current
or GND
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.
Note 7: I
CC
for 54ACT @ 25C is identical to 74ACT @ 25C.
AC Electrical Characteristics
V
CC
54AC
Symbol
Parameter
(V)
T
A
= -55C to +125C
Units
Fig.
(Note 8)
C
L
= 50 pF
No.
Min
Max
f
max
Maximum Clock
3.3
70
MHz
Frequency
5.0
95
t
PLH
Propagation Delay
3.3
1.0
13.0
ns
C
Dn
or S
Dn
to Q
n
or Q
n
5.0
1.0
9.5
t
PHL
Propagation Delay
3.3
1.0
14.0
ns
C
Dn
or S
Dn
to Q
n
or Q
n
5.0
1.0
10.5
t
PLH
Propagation Delay
3.3
1.0
17.5
ns
CP
n
to Q
n
or Q
n
5.0
1.0
12.0
t
PHL
Propagation Delay
3.3
1.0
13.5
ns
CP
n
to Q
n
or Q
n
5.0
1.0
10.0
Note 8: Voltage Range 3.3 is 3.3V
0.3V
Voltage Range 5.0 is 5.0V
0.5V
AC Operating Requirements
54AC
Symbol
Parameter
V
CC
T
A
= -55C to +125C
Units
Fig.
(V)
C
L
= 50 pF
No.
(Note 9)
Guaranteed Limits
t
s
Set-up Time, HIGH or LOW
3.3
5.0
ns
D
n
to CP
n
5.0
4.0
t
h
Hold Time, HIGH or LOW
3.3
0.5
ns
D
n
to CP
n
5.0
0.5
t
w
CP
n
or C
Dn
or S
Dn
3.3
8.0
ns
Pulse Width
5.0
5.5
t
rec
Recovery Time
3.3
0.5
ns
C
Dn
or S
Dn
to CP
5.0
0.5
Note 9: Voltage Range 3.3 is 3.3V
0.3V
Voltage Range 5.0 is 5.0V
0.5V
54AC74/54ACT74
www.national.com
5