74AC574 • 74ACT574 Octal D-Type Flip-Flop with 3-STATE Outputs
September 1988
Revised November 1999
74AC574 • 74ACT574
Octal D-Type Flip-Flop with 3-STATE Outputs
General Description
The AC/ACT574 is a high-speed, low power octal flip-flop
with a buffered common Clock (CP) and a buffered com-
mon Output Enable (OE). The information presented to the
D-type inputs is stored in the flip-flops on the LOW-to-HIGH
Clock (CP) transition.
The AC/ACT574 is functionally identical to the AC/ACT374
except for the pinouts.
Features
s
I
CC
and I
OZ
reduced by 50%
s
Inputs and outputs on opposite sides of package
allowing easy interface with microprocessors
s
Useful as input or output port for microprocessors
s
Functionally identical to AC/ACT374
s
3-STATE outputs for bus-oriented applications
s
Outputs source/sink 24 mA
s
ACT574 has TTL-compatible inputs
Ordering Code:
Order Number
74AC574SC
74AC574SJ
74AC574MTC
74AC574PC
74ACT574SC
74ACT574SJ
74ACT574MTC
74ACT574PC
Package Number
M20B
M20D
MTC20
N20A
M20B
M20D
MTC20
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-01
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
20-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.
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
D
0
–D
7
CP
OE
O
0
–O
7
Data Inputs
Clock Pulse Input
3-STATE Output Enable Input
3-STATE Outputs
Description
FACT is a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation
DS009910
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74AC574 • 74ACT574
Functional Description
The AC/ACT574 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 com-
mon to all flip-flops. The eight flip-flops will store the state
of their individual D-type 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 OE
is HIGH, the outputs go to the high impedance state. Oper-
ation 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 D
H
L
H
L
H
L
H
L
H
Internal
Q
NC
NC
L
H
L
H
NC
NC
Outputs
O
N
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
H
H
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
=
LOW-to-HIGH Transition
NC
=
No Change
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
74AC574 • 74ACT574
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
OZ
Maximum Input Leakage Current
Maximum
3-STATE
Leakage Current
I
OLD
I
OHD
I
CC
(Note 4)
Minimum Dynamic
Output Current (Note 3)
Maximum Quiescent Supply Current
5.5
5.5
5.5
4.0
75
−75
40.0
mA
mA
µA
5.5
±0.25
±2.5
µA
5.5
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
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
µA
V
I
OL
=
12 mA
I
OL
=
24 mA
I
OL
=
24 mA (Note 2)
V
I
=
V
CC
, GND
V
I
(OE)
=
V
IL
, V
IH
V
I
=
V
CC
, V
GND
V
O
=
V
CC
, GND
V
OLD
=
1.65V
V
OHD
=
3.85V
V
IN
=
V
CC
or GND
V
I
OUT
=
50
µA
V
V
IN
=
V
IL
or V
IH
I
OH
= −12
mA
I
OH
= −24
mA I
OH
I
OH
= −24
mA (Note 2)
V
I
OUT
= −50 µA
V
V
OUT
=
0.1V
or V
CC
−
0.1V
V
Units
Conditions
V
OUT
=
0.1V
or V
CC
−
0.1V
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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74AC574 • 74ACT574
DC Electrical Characteristics for ACT
Symbol
V
IH
V
IL
V
OH
Parameter
Minimum HIGH Level
Input Voltage
Maximum LOW Level
Input Voltage
Minimum HIGH Level
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
I
OZ
I
CCT
I
]OLD
I
OHD
I
CC
Maximum Input
Leakage Current
Maximum 3-STATE
Leakage Current
Maximum I
CC
/Input
Minimum Dynamic
Output Current (Note 6)
Maximum Quiescent
Supply Current
5.5
5.5
5.5
5.5
5.5
5.5
4.0
0.6
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
±0.25
T
A
= −40°C
to
+85°C
Guaranteed Limits
2.0
2.0
0.8
0.8
4.4
5.4
3.76
4.76
0.1
0.1
0.44
0.44
±1.0
±2.5
1.5
75
−75
40.0
µA
µA
mA
mA
mA
µA
V
Units
V
V
V
Conditions
V
OUT
=
0.1V
or V
CC
−
0.1V
V
OUT
=
0.1V
or V
CC
−
0.1V
I
OUT
= −50 µA
V
IN
=
V
IL
or V
IH
V
I
OH
= −24
mA
I
OH
= −24
mA (Note 5)
I
OUT
=
50
µA
V
IN
=
V
IL
or V
IH
V
I
OL
=
24 mA
I
OL
=
24 mA (Note 5)
V
I
=
V
CC
, GND
V
I
=
V
IL
, V
IH
V
O
=
V
CC
, GND
V
I
=
V
CC
−
2.1V
V
OLD
=
1.65V
V
OHD
=
3.85V
V
IN
=
V
CC
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.
AC Electrical Characteristics for AC
V
CC
Symbol
f
MAX
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Parameter
Maximum Clock
Frequency
Propagation Delay
CP to O
n
Propagation Delay
CP to O
n
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
(V)
(Note 7)
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
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
75
95
3.5
2.0
3.5
2.0
2.5
2.0
3.0
2.0
3.5
2.0
2.0
1.0
Typ
112
153
8.5
6.0
7.5
5.5
7.0
5.0
6.5
5.0
7.5
6.0
5.5
4.5
13.5
9.5
12.0
8.5
11.0
8.5
10.5
8.0
12.0
9.5
9.0
7.5
Max
T
A
= −40°C
to
+85°C
C
L
=
50 pF
Min
60
85
3.5
2.0
3.5
2.0
2.5
2.0
3.0
1.5
2.5
1.5
1.5
1.0
15.0
11.0
13.5
9.5
12.0
9.0
11.5
9.0
13.0
10.5
10.0
8.5
Max
MHz
ns
ns
ns
ns
ns
ns
Units
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4
74AC574 • 74ACT574
AC Operating Requirements for AC
V
CC
Symbol
t
S
t
H
t
W
Parameter
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
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
0.5
0
−0.5
0
3.5
2.0
2.5
1.5
1.5
1.5
6.0
4.0
T
A
= −40°C
to
+85°C
C
L
=
50 pF
Guaranteed Minimum
3.0
2.0
1.5
1.5
7.0
5.0
ns
ns
ns
Units
(V)
(Note 8)
3.3
5.0
3.3
5.0
3.3
5.0
AC Electrical Characteristics for ACT
V
CC
Symbol
Parameter
(V)
(Note 9)
f
MAX
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Maximum Clock Frequency
Propagation Delay
CP to O
n
Propagation Delay
CP to O
n
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
5.0
5.0
5.0
5.0
5.0
5.0
5.0
Min
100
2.5
2.0
2.0
2.0
2.0
2.0
T
A
= +25°C
C
L
=
50 pF
Typ
110
7.0
6.5
6.4
6.0
7.0
5.5
11.0
10.0
9.5
9.0
10.5
8.5
Max
T
A
= −40°C
to
+85°C
C
L
=
50 pF
Min
85
2.0
1.5
1.5
1.5
1.5
1.5
12.0
11.0
10.0
10.0
11.5
9.0
Max
ns
ns
ns
ns
ns
ns
ns
Units
Note 9:
Voltage Range 5.0 is 5.0V
±0.5V
AC Operating Requirements for ACT
V
CC
Symbol
t
S
t
H
t
W
Parameter
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
Note 10:
Voltage Range 5.0 is 5.0V
±
0.5V
T
A
= +25°C
C
L
=
50 pF
Typ
1.5
−0.5
2.5
T
A
= −40°C
to
+85°C
C
L
=
50 pF
Guaranteed Minimum
2.5
1.0
4.0
ns
ns
ns
Units
(V)
(Note 10)
5.0
5.0
5.0
Capacitance
Symbol
C
IN
C
PD
Parameter
Input Capacitance
Power Dissipation Capacitance
Typ
4.5
40.0
Units
pF
pF
V
CC
=
OPEN
V
CC
=
5.0V
Conditions
5
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