74ACQ573 • 74ACTQ573 Quiet Series Octal Latch with 3-STATE Outputs
January 1990
Revised October 2000
74ACQ573 • 74ACTQ573
Quiet Series
Octal Latch with 3-STATE Outputs
General Description
The ACQ/ACTQ573 is a high-speed octal latch with buff-
ered common Latch Enable (LE) and buffered common
Output Enable (OE) inputs. The ACQ/ACTQ573 is func-
tionally identical to the ACQ/ACTQ373 but with inputs and
outputs on opposite sides of the package. The ACQ/ACTQ
utilizes Fairchild’s Quiet Series
technology to guarantee
quiet output switching and improved dynamic threshold
performance. FACT Quiet Series
features GTO
output
control and undershoot corrector in addition to a split
ground bus for superior performance.
Features
s
I
CC
and I
OZ
reduced by 50%
s
Guaranteed simultaneous switching noise level and
dynamic threshold performance
s
Guaranteed pin-to-pin skew AC performance
s
Improved latch-up immunity
s
Inputs and outputs on opposite sides of package allow
easy interface with microprocessors
s
Outputs source/sink 24 mA
Ordering Code:
Order Number
74ACQ573SC
74ACQ573SJ
74ACQ573MTC
74ACQ573PC
74ACTQ573SC
74ACTQ573SJ
74ACTQ573QSC
74ACTQ573MTC
74ACTQ573PC
Package Number
M20B
M20D
MTC20
N20A
M20B
M20D
MQA20
MTC20
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 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-013, 0.300 Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 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
IEEE/IEC
Connection Diagram
Pin Descriptions
Pin Names
D
0
–D
7
LE
OE
O
0
–O
7
Description
Data Inputs
Latch Enable Input
3-STATE Output Enable Input
3-STATE Latch Outputs
FACT, Quiet Series, FACT Quiet Series, and GTO are trademarks of Fairchild Semiconductor Corporation
© 2000 Fairchild Semiconductor Corporation
DS010633
www.fairchildsemi.com
74ACQ573 • 74ACTQ573
Functional Description
The ACQ/ACTQ573 contains eight D-type latches with 3-
STATE output buffers. When the Latch Enable (LE) input is
HIGH, data on the D
n
inputs enters the latches. In this con-
dition the latches are transparent, i.e., a latch output will
change state each time its D-type input changes. When LE
is LOW the latches store the information that was present
on the D-type inputs at setup time preceding the
HIGH-to-LOW transition of LE. The 3-STATE buffers are
controlled by the Output Enable (OE) input. When OE is
LOW, the buffers are enabled. When OE is HIGH the buff-
ers are in the high impedance mode but this does not inter-
fere with entering new data into the latches.
Truth Table
Inputs
OE
L
L
L
H
LE
H
H
L
X
D
H
L
X
X
Outputs
O
n
H
L
O
0
Z
H
=
HIGH Voltage
L
=
LOW Voltage
Z
=
High Impedance
X
=
Immaterial
O
0
=
Previous O
0
before HIGH-to-LOW transition of Latch Enable
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
74ACQ573 • 74ACTQ573
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
)
DC Latchup Source
or Sink Current
Junction Temperature (T
J
)
PDIP
140
°
C
−
0.5V to
+
7.0V
−
20 mA
+
20 mA
−
0.5V to V
CC
+
0.5V
−
20 mA
+
20 mA
−
0.5V to V
CC
+
0.5V
±
50 mA
±
50 mA
−
65
°
C to
+
150
°
C
±
300 mA
Recommended Operating
Conditions
Supply Voltage (V
CC
)
ACQ
ACTQ
Input Voltage (V
I
)
Output Voltage (V
O
)
Operating Temperature (T
A
)
Minimum Input Edge Rate
∆
V/
∆
t
ACQ Devices
V
IN
from 30% to 70% of V
CC
V
CC
@ 3.0V, 4.5V, 5.5V
Minimum Input Edge Rate
∆
V/
∆
t
ACTQ 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 ACQ
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
OZ
Maximum Input Leakage Current
Minimum Dynamic
Output Current (Note 3)
Maximum 3-STATE
Leakage Current
V
OLP
Quiet Output
Maximum Dynamic V
OL
5.5
±0.25
±2.5
µA
5.5
5.5
5.5
5.5
4.0
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
40.0
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
=
1.65 V
Max
V
OHD
=
3.85 V
Min
V
IN
=
V
CC
or GND
V
I
(OE)
=
V
IL
, V
IH
V
I
=
V
CC
, GND
V
O
=
V
CC
, GND
5.0
1.1
1.5
V
Figures 1, 2
(Note 5)(Note 6)
V
I
OUT
=
50
µA
V
I
OH
= −12
mA
I
OH
= −24
mA
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
I
CC
(Note 4) Maximum Quiescent Supply Current
3
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74ACQ573 • 74ACTQ573
DC Electrical Characteristics for ACQ
Symbol
V
OLV
V
IHD
V
ILD
Parameter
Quiet Output
Minimum Dynamic V
OL
Minimum HIGH Level
Dynamic Input Voltage
Maximum LOW Level
Dynamic Input Voltage
V
CC
(V)
5.0
5.0
5.0
Typ
−0.6
3.1
1.9
(Continued)
T
A
= −40°C
to
+85°C
Guaranteed Limits
−1.2
3.5
1.5
V
V
V
Figures 1, 2
(Note 5)(Note 6)
(Note 5)(Note 7)
(Note 5)(Note 7)
T
A
= +25°C
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
.
Note 5:
Plastic DIP package.
Note 6:
Max number of outputs defined as (n). Data Inputs are driven 0V to 5V. One output @ GND.
Note 7:
Max number of Data Inputs (n) switching. (n
−
1) Inputs switching 0V to 5V (ACQ). Input-under-test switching: 5V to threshold (V
ILD
),
0V to threshold (V
IHD
), f
=
1 MHz.
DC Electrical Characteristics for ACTQ
Symbol
V
IH
V
IL
V
OH
Parameter
Minimum HIGH Level
Input Voltage
Maximum LOW Level
Input 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
I
OZ
I
CCT
I
OLD
I
OHD
I
CC
V
OLP
V
OLV
V
IHD
V
ILD
Maximum Input
Leakage Current
Maximum 3-STATE
Leakage Current
Maximum I
CC
/Input
Minimum Dynamic
Output Current (Note 9)
Maximum Quiescent Supply Current
Quiet Output
Maximum Dynamic V
OL
Quiet Output
Minimum Dynamic V
OL
Minimum HIGH Level
Dynamic Input Voltage
Maximum LOW Level
Dynamic Input Voltage
5.5
5.5
5.5
5.5
5.5
5.5
5.0
5.0
5.0
5.0
1.1
−0.6
1.9
1.2
4.0
1.5
−1.2
2.2
0.8
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
0.8
0.8
4.4
5.4
3.86
4.86
0.1
0.1
0.36
0.36
±0.1
±0.25
2.0
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
V
V
V
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 8)
I
OUT
=
50
µA
V
IN
=
V
IL
or V
IH
V
I
OL
=
24 mA
I
OL
=
24 mA (Note 8)
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 Max
V
OHD
=
3.85V Min
V
IN
=
V
CC
or GND
Figures 1, 2
(Note 10)(Note 11)
Figures 1, 2
(Note 10)(Note 11)
(Note 10)(Note 12)
(Note 10)(Note 12)
Note 8:
All outputs loaded; thresholds on input associated with output under test.
Note 9:
Maximum test duration 2.0 ms, one output loaded at a time.
Note 10:
Plastic DIP package.
Note 11:
Max number of outputs defined as (n). Data Inputs are driven 0V to 3V. One output @ GND.
Note 12:
Max number of data inputs (n) switching. (n
−
1) inputs switching 0V to 3V (ACTQ). Input-under-test switching: 3V to threshold (V
ILD
),
0V to threshold (V
IHD
), f
=1
MHz.
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4
74ACQ573 • 74ACTQ573
AC Electrical Characteristics for ACQ
V
CC
Symbol
t
PHL
t
PLH
t
PLH
t
PHL
t
PZL
t
PZH
t
PHZ
t
PLZ
t
OSHL
t
OSLH
Output to Output Skew (Note 14)
D
n
to O
n
Voltage Range 3.3 is 3.3V
±
0.3V
Note 14:
Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The
specification applies to any outputs switching in the same direction, either HIGH-to-LOW (t
OSHL
) or LOW-to-HIGH (t
OSLH
). Parameter guaranteed by design.
T
A
= +25°C
C
L
=
50 pF
Min
2.5
1.5
2.5
2.0
2.5
1.5
1.0
1.0
Typ
8.5
5.5
8.5
6.0
8.5
6.0
9.0
6.0
1.0
0.5
Max
10.5
7.0
12.0
8.0
13.0
8.5
14.5
9.5
1.5
1.0
T
A
= −40°C
to
+85°C
C
L
=
50 pF
Min
2.5
1.5
2.5
2.0
2.5
1.5
1.0
1.0
Max
11.0
7.5
12.5
8.5
13.5
9.0
15.0
10.0
1.5
1.0
ns
ns
ns
ns
ns
Units
Parameter
Propagation Delay
D
n
to O
n
Propagation Delay
LE to O
n
Output Enable Time
Output Disable Time
(V)
(Note 13)
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
Note 13:
Voltage Range 5.0 is 5.0V
±
0.5V
AC Operating Requirements for ACQ
V
CC
Symbol
Parameter
(V)
(Note 15)
t
S
t
H
t
W
Setup Time, HIGH or LOW
D
n
to LE
Hold Time, HIGH or LOW
D
n
to LE
LE Pulse Width, HIGH
3.3
5.0
3.3
5.0
3.3
5.0
Note 15:
Voltage Range 5.0 is 5.0V
±
0.5V
Voltage Range 3.3 is 3.3V
±
0.3V
T
A
= +25°C
C
L
=
50 pF
Typ
0
0
0
0
2.0
2.0
3.0
3.0
1.5
1.5
4.0
4.0
T
A
= −40°C
to
+85°C
C
L
=
50 pF
Guaranteed Minimum
3.0
3.0
1.5
1.5
4.0
4.0
ns
ns
ns
Units
AC Electrical Characteristics for ACTQ
V
CC
Symbol
t
PHL
t
PLH
t
PLH
t
PHL
t
PZL
, t
PZH
t
PHZ
, t
PLZ
t
OSHL
t
OSLH
Parameter
Propagation Delay
D
n
to O
n
Propagation Delay
LE to O
n
Output Enable Time
Output Disable Time
Output to Output Skew (Note 17)
D
n
to O
n
(V)
(Note 16)
5.0
5.0
5.0
5.0
5.0
Min
2.0
2.5
2.0
1.0
T
A
= +25°C
C
L
=
50 pF
Typ
6.5
7.0
7.0
8.0
0.5
Max
7.5
8.5
9.0
10.0
1.0
T
A
= −40°C
to
+85°C
C
L
=
50 pF
Min
2.0
2.5
2.0
1.0
Max
8.0
9.0
9.5
10.5
1.0
ns
ns
ns
ns
ns
Units
Note 16:
Voltage Range 5.0 is 5.0V
±
0.5V
Note 17:
Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The
specification applies to any outputs switching in the same direction, either HIGH-to-LOW (t
OSHL
) or LOW-to-HIGH (t
OSLH
). Parameter guaranteed by design.
5
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