74FR573 Octal D-Type Latch with 3-STATE Outputs
January 1991
Revised August 1999
74FR573
Octal D-Type Latch with 3-STATE Outputs
General Description
The 74FR573 is a high speed octal latch with buffered
common Latch Enable (LE) and buffered common Output
Enable (OE) inputs.
This device is functionally identical to the 74F573.
Features
s
Broadside pinout aids in PC layout
s
Functionally identical to the 74F373, 74F573
s
Outputs have current sourcing capability of 15 mA and
current sinking capability of 64 mA
s
Guaranteed pin-to-pin skew
Ordering Code:
Order Number
74FR573SC
74FR573PC
Package Number
M20B
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
Pin Descriptions
Pin Names
OE
LE
D
0
–D
7
O
0
–O
7
Description
Output Enable Input (Active-LOW)
Latch Enable Input (Active-HIGH)
Data Inputs
3-STATE Latch Outputs
© 1999 Fairchild Semiconductor Corporation
DS010903
www.fairchildsemi.com
74FR573
Functional Description
The 74FR573 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 condition
the latches are transparent, i.e., a latch output will change
state each time its D input changes. When LE is LOW the
latches store the information that was present on the D
inputs a 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 in the
bi-state mode. When OE is HIGH the buffers are in the high
impedance mode, but this does not interfere with entering
new data into the latches.
Function Table
Inputs
OE
L
L
L
H
LE
H
H
L
X
D
n
H
L
X
X
Output
O
n
H
L
O
n
−
1
High Z State
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Logic Diagram
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2
74FR573
Absolute Maximum Ratings
(Note 1)
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
V
CC
Pin Potential to Ground Pin
Input Voltage (Note 2)
Input Current (Note 2)
Voltage Applied to Output
in HIGH State (with V
CC
=
0V)
Standard Output
3-STATE Output
Current Applied to Output
in LOW State (Max)
ESD Last Passing Voltage (Min)
twice the rated I
OL
(mA)
4000V
−0.5V
to V
CC
−0.5
to
+5.5V
−65°C
to
+150°C
−55°C
to 125°C
−55°
to
+150°C
−0.5V
to
+7.0V
−0.5V
to
+7.0V
−30
mA to
+5.0
mA
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0°C to
+70°C
+4.5V
to 5.5V
Note 1:
Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 2:
Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
CD
V
OH
V
OL
I
IH
I
BVI
I
IL
V
ID
I
OD
I
OZH
I
OZL
I
OS
I
CEX
I
ZZ
I
CCH
I
CCL
I
CCZ
C
IN
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
Output LOW Voltage
Input HIGH Current
Input HIGH Current
Breakdown Test
Input LOW Current
Input Leakage Test
Output Circuit
Leakage Current
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Output HIGH Leakage Current
Bus Drainage Test
Power Supply Current
Power Supply Current
Power Supply Current
Input Capacitance
26
55
32
8.0
−100
4.75
2.4
2.0
0.55
5
7
−150
−100
Min
2.0
0.8
−1.2
Typ
Max
Units
V
V
V
V
V
V
µA
µA
µA
µA
V
Min
Min
Min
Min
Max
Max
Max
Max
0.0
V
CC
Conditions
Recognized HIGH Signal
Recognized LOW Signal
I
IN
= −18
mA
I
OH
= −3
mA
I
OH
= −15
mA
I
IOL
=
64 mA
V
IN
=
2.7V
V
IN
=
7.0V
V
IN
=
0.5V Data Inputs
V
IN
=
0.5V Control Inputs
I
ID
=
1.9
µA,
All Other Pins Grounded
3.75
20
−20
−225
50
100
32
65
40
µA
µA
µA
mA
µA
µA
mA
mA
mA
pF
0.0
Max
Max
Max
Max
0.0
Max
Max
Max
5.0
µA
IOD
=
150 mV,
All Other Pins Grounded
V
OUT
=
2.7V
V
OUT
=
0.5V
V
OUT
=
0.0V
V
OUT
=
V
CC
V
OUT
=
5.25V
All Outputs HIGH
All Outputs LOW
Outputs 3-STATED
3
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74FR573
AC Electrical Characteristics
T
A
= +25°C
Symbol
Parameter
Min
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Output Disable Time
Propagation Delay
D
n
to O
n
Propagation Delay
LE to O
n
Output Enable Time
1.7
1.7
2.6
2.6
2.8
2.8
2.2
2.2
V
CC
= +5.0V
C
L
=
50 pF
Typ
2.9
2.6
6.0
4.3
4.0
5.0
4.0
3.5
Max
4.5
4.5
8.5
8.5
7.4
7.4
6.3
6.3
T
A
=
0°C to
+70°C
V
CC
= +5.0V
C
L
=
50 pF
Min
1.7
1.7
2.6
2.6
2.8
2.8
2.2
2.2
Max
4.5
4.5
8.5
8.5
7.4
7.4
6.3
6.3
ns
ns
ns
ns
Units
AC Operating Requirements
T
A
= +25°C
Symbol
Parameter
Min
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
W
(H)
Setup Time, HIGH or LOW
D
n
to LE
Hold Time, HIGH or LOW
D
n
to LE
LE Pulse Width HIGH
1.0
1.0
2.5
2.5
5.0
V
CC
= +5.0V
C
L
=
50 pF
Typ
−0.4
−0.7
0.9
0.6
2.7
Max
T
A
=
0°C to
+70°C
V
CC
= +5.0V
C
L
=
50 pF
Min
1.0
1.0
2.5
2.5
5.0
Max
ns
ns
ns
Units
Extended AC Electrical Characteristics
T
A
=
0°C to
+70°C
V
CC
= +5.0V
Symbol
Parameter
C
L
=
50 pF
Eight Outputs Switching
(Note 3)
Min
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
OSHL
(Note 5)
t
OSLH
(Note 5)
t
OST
(Note 5)
Pin-to-Pin Skew
for HL Transitions
Pin-to-Pin Skew
for LH Transitions
Pin-to-Pin Skew
for HL/LH Transitions
Output Disable Time
Propagation Delay
D
n
to O
n
Propagation Delay
LE to O
n
Output Enable Time
1.7
1.7
2.6
2.6
2.8
2.8
2.2
2.2
Max
5.7
5.7
9.8
9.8
9.6
9.6
7.3
7.3
1.3
1.3
3.0
Min
3.4
3.4
4.5
4.5
Max
8.1
8.1
12.3
12.3
ns
ns
ns
ns
ns
ns
ns
T
A
=
0°C to
+70°C
V
CC
= +5.0V
C
L
=
250 pF
(Note 4)
Units
Note 3:
This specification is guaranteed but not tested. The limits apply to propagation delays for all paths described switching in phase,
i.e. all LOW-to-HIGH, HIGH-to-LOW, 3-STATE-to-HIGH, etc.
Note 4:
These specifications guaranteed but not tested. The limits represent propagation delays with 250 pF load capacitors in place of the 50 pF load
capacitors in the standard AC load. This specification pertains to single output switching only.
Note 5:
Skew is defined as the absolute value of the difference between the actual propagation delays for any two outputs of the same device. The specifi-
cation applies to any outputs switching HIGH-to-LOW, (t
OSHL
), LOW-to-HIGH, (t
OSLH
) or any combination of HIGH-to-LOW and/or LOW-to-HIGH, (t
OST
).
Specifications guaranteed with all outputs switching in phase.
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4
74FR573
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
5
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