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Электронный компонент: 5962-8763101RA

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54AC374
54ACT374
Octal D Flip-Flop with TRI-STATE
Outputs
General Description
The 'AC/'ACT374 is a high-speed, low-power octal D-type
flip-flop featuring separate D-type inputs for each flip-flop
and TRI-STATE outputs for bus-oriented applications. A buff-
ered Clock (CP) and Output Enable (OE) are common to all
flip-flops.
Features
n
I
CC
and I
OZ
reduced by 50%
n
Buffered positive edge-triggered clock
n
TRI-STATE outputs for bus-oriented applications
n
Outputs source/sink 24 mA
n
See '273 for reset version
n
See '377 for clock enable version
n
See '373 for transparent latch version
n
See '574 for broadside pinout version
n
See '564 for broadside pinout version with inverted
outputs
n
'ACT374 has TTL-compatible inputs
n
Standard Military Drawing (SMD)
-- 'AC374: 5962-87694
-- 'ACT374: 5962-87631
Logic Symbols
Pin
Names
Description
D
0
D
7
Data Inputs
CP
Clock Pulse Input
OE
TRI-STATE Output Enable Input
O
0
O
7
TRI-STATE Outputs
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
FACT
is a registered trademark of Fairchild Semiconductor Corporation.
DS100289-1
IEEE/IEC
DS100289-2
August 1998
54AC374
54ACT374
Octal
D
Flip-Flop
with
TRI-ST
A
T
E
Outputs
1998 National Semiconductor Corporation
DS100289
www.national.com
Connection Diagrams
Functional Description
The 'AC/'ACT374 consists of eight edge-triggered flip-flops
with individual 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 time require-
ments 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 out-
puts go to the high impedance state. Operation of the OE in-
put does not affect the state of the flip-flops.
Truth Table
Inputs
Outputs
D
n
CP
OE
O
n
H
N
L
H
L
N
L
L
X
X
H
Z
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
N
= LOW-to-HIGH Transition
Logic Diagram
Pin Assignment for DIP
and Flatpak
DS100289-3
Pin Assignment for LCC
DS100289-4
DS100289-5
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
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
= -55C to +125C
Units
Conditions
(V)
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
3.0
0.50
12 mA
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
OZ
Maximum
V
I
(OE) = V
IL
, V
IH
TRI-STATE
5.5
5.0
A
V
I
= V
CC
, GND
Current
V
O
= V
CC
, GND
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3
DC Characteristics for 'AC Family Devices
(Continued)
54AC
Symbol
Parameter
V
CC
T
A
= -55C to +125C
Units
Conditions
(V)
Guaranteed Limits
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
80.0
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
= -55C to +125C
Units
Conditions
(V)
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
OZ
Maximum
5.5
5.0
A
V
I
= V
IL
, V
IH
TRI-STATE Current
V
O
= V
CC
, GND
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
I
CC
Maximum Quiescent
5.5
80.0
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.
www.national.com
4
AC Electrical Characteristics
54AC
V
CC
T
A
= -55C to +125C
Fig.
Symbol
Parameter
(V)
C
L
= 50 pF
Units
No.
(Note 8)
Min
Max
f
max
Maximum Clock
3.3
60
MHz
Frequency
5.0
95
t
PLH
Propagation Delay
3.3
3.0
16.5
ns
CP to O
n
5.0
3.0
12.0
t
PHL
Propagation Delay
3.3
3.0
15.0
ns
CP to O
n
5.0
3.0
11.0
t
PZH
Output Enable Time
3.3
1.0
14.0
ns
5.0
1.5
10.5
t
PZL
Output Enable Time
3.3
1.0
14.0
ns
5.0
1.5
10.5
t
PHZ
Output Disable Time
3.3
1.0
16.0
ns
5.0
1.5
12.5
t
PLZ
Output Disable Time
3.3
1.0
13.0
ns
5.0
1.5
10.5
Note 8: Voltage Range 3.3 is 3.3V
0.3V
Voltage Range 5.0 is 5.0V
0.5V
AC Operating Requirements
54AC
V
CC
T
A
= -55C
Fig.
Symbol
Parameter
(V)
to +125C
Units
No.
(Note 9)
C
L
= 50 pF
Guaranteed Minimum
t
s
Setup Time, HIGH or LOW
3.3
6.5
ns
D
n
to CP
5.0
5.0
t
h
Hold Time, HIGH or LOW
3.3
1.0
ns
D
n
to CP
5.0
1.5
t
w
CP Pulse Width,
3.3
6.5
ns
HIGH or LOW
5.0
5.0
Note 9: Voltage Range 3.3 is 3.3V
0.3V
Voltage Range 5.0 is 5.0V
0.5V
AC Electrical Characteristics
54ACT
V
CC
T
A
= -55C
Symbol
Parameter
(V)
to +125C
Units
(Note 10)
C
L
= 50 pF
Min
Max
f
max
Maximum Clock
5.0
70
MHz
Frequency
t
PLH
Propagation Delay
5.0
1.5
12.0
ns
CP to O
n
t
PHL
Propagation Delay
5.0
1.5
11.5
ns
CP to O
n
t
PZH
Output Enable Time
5.0
1.5
11.5
ns
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5