TL F 10191
DM74LS564
Octal
D-Type
Flip-Flop
with
TRI-STATE
Outputs
February 1992
DM74LS564
Octal D-Type Flip-Flop with TRI-STATE
Outputs
General Description
The 'LS564 is a high speed low power octal flip-flop with a
buffered common Clock (CP) and a buffered common Out-
put Enable (OE) The information presented to the D inputs
is stored in the flip-flops on the LOW-to-HIGH Clock (CP)
transition
This device is functionally identical to the 'LS574 but has
inverted outputs For complete discussions of operations
truth tables AC and DC electrical specifications refer to the
'LS374 data sheet
Features
Y
Inputs and outputs on opposite sides of package allow-
ing easy interface with microprocessors
Y
Useful as input or output port for microprocessors
Y
Functionally identical to 'LS574
Y
Input clamp diodes limit high speed termination effects
Y
Fully TTL and CMOS compatible
Connection Diagram
Dual-In-Line Package
TL F 10191 1
Order Number DM74LS564WM or DM74LS564N
See NS Package Number M20B or N20A
Logic Symbol
TL F 10191 2
V
CC
e
Pin 20
GND
e
Pin 10
Pin Names
Description
D0 D7
Data Inputs
CP
Clock Pulse Input (Active Rising Edge)
OE
TRI-STATE Output Enable Input
(Active LOW)
O0 O7
TRI-STATE Outputs
TRI-STATE
is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation
RRD-B30M105 Printed in U S A
Absolute Maximum Ratings
(Note)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
DM74LS
0 C to
a
70 C
Storage Temperature Range
b
65 C to
a
150 C
Note
The ``Absolute Maximum Ratings'' are those values
beyond which the safety of the device cannot be guaran-
teed The device should not be operated at these limits The
parametric values defined in the ``Electrical Characteristics''
table are not guaranteed at the absolute maximum ratings
The ``Recommended Operating Conditions'' table will define
the conditions for actual device operation
Recommended Operating Conditions
Symbol
Parameter
DM74LS564
Units
Min
Nom
Max
V
CC
Supply Voltage
4 75
5
5 25
V
V
IH
High Level Input Voltage
2
V
V
IL
Low Level Input Voltage
0 8
V
I
OH
High Level Output Current
b
2 6
mA
I
OL
Low Level Output Current
24
mA
T
A
Free Air Operating Temperature
0
70
C
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 1)
V
I
Input Clamp Voltage
V
CC
e
Min I
I
e b
18 mA
b
1 5
V
V
OH
High Level Output
V
CC
e
Min I
OH
e
Max
2 4
3 4
V
Voltage
V
IL
e
Max
V
OL
Low Level Output
V
CC
e
Min I
OL
e
Max
0 35
0 5
V
Voltage
V
IH
e
Min
I
OL
e
12 mA V
CC
e
Min
0 25
0 4
I
I
Input Current
Max
V
CC
e
Max V
I
e
7V
0 1
mA
Input Voltage
I
IH
High Level Input Current
V
CC
e
Max V
I
e
2 7V
20
m
A
I
IL
Low Level Input Current
V
CC
e
Max V
I
e
0 4V
b
0 4
mA
I
OS
Short Circuit
V
CC
e
Max
b
30
b
130
mA
Output Current
(Note 2)
I
CC
Supply Current
V
CC
e
Max
60
mA
I
OZH
TRI-STATE Output OFF
V
CC
e
Max V
O
e
2 4V
20
m
A
Current HIGH
I
OZL
TRI-STATE Output OFF
V
CC
e
Max V
O
e
0 4V
b
20
m
A
Current LOW
Note 1
All typicals are at V
CC
e
5V T
A
e
25 C
Note 2
Not more than one output should be shorted at a time and the duration should not exceed one second
2
Switching Characteristics
V
CC
e a
5 0V T
A
e a
25 C
Symbol
Parameter
Min
Max
Units
t
PLH
Propagation Delay
28
ns
t
PHL
CP to On
28
t
PZH
Enable Time
28
ns
t
PZL
OE to On
28
t
PHZ
Enable Time
20
ns
t
PLZ
OE to On
25
t
s
Setup Time
20
ns
Dn to CP
t
h
Hold Time
5
ns
Dn to CP
t
w
(H)
Pulse Width
20
ns
t
w
(L)
(HIGH LOW) CP
15
Physical Dimensions
inches (millimeters)
20-Lead Wide Small Outline Molded Package (M)
Order Number DM74LS564WM
NS Package Number M20B
3
DM74LS564
Octal
D-Type
Flip-Flop
with
TRI-STATE
Outputs
Physical Dimensions
inches (millimeters) (Continued)
20-Lead Molded Dual-In-Line Package (N)
Order Number DM74LS564N
NS Package Number N20A
LIFE SUPPORT POLICY
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DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION As used herein
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support device or system whose failure to perform can
into the body or (b) support or sustain life and whose
be reasonably expected to cause the failure of the life
failure to perform when properly used in accordance
support device or system or to affect its safety or
with instructions for use provided in the labeling can
effectiveness
be reasonably expected to result in a significant injury
to the user
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