DM81LS98AWM [NSC]
TRI-STATE Octal Buffer; 三态八路缓冲器
| 型号： | DM81LS98AWM |
| 厂家： | 
National Semiconductor |
| 描述： | TRI-STATE Octal Buffer |
| 文件： | 总6页 (文件大小：120K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
September 1991
DM74LS465 (DM81LS95A)/DM74LS466 (DM81LS96A)/
DM74LS467 (DM81LS97A)/DM74LS468 (DM81LS98A)
TRI-STATE Octal Buffer
É
General Description
These devices provide eight, two-input buffers in each pack-
age. All employ the newest low-power-Schottky TTL tech-
nology. One of the two inputs to each buffer is used as a
control line to gate the output into the high-impedance
state, while the other input passes the data through the buff-
er. The ’LS465 and ’LS467 present true data at the outputs,
while the ’LS466 and ’LS468 are inverting. On the ’LS465
and ’LS466 versions, all eight TRI-STATE enable lines are
common, with access through a 2-input NOR gate. On the
’LS467 and ’LS468 versions, four buffers are enabled from
one common line, and the other four buffers are enabled
from another common line. In all cases the outputs are
placed in the TRI-STATE condition by applying a high logic
level to the enable pins. These devices represent octal, low
power-Schottky versions of the very popular DM54/74365,
366, 367, and 368 (DM8095, 96, 97, and 98) TRI-STATE
hex buffers.
Features
Y
Octal versions of popular DM74365, 366, 367, and 368
(DM8095, 96, 97 and 98)
Y
Typical power dissipation
LS465, 467, (LS95A, 97A) 80 mW
LS466, 468, (LS96A, 98A) 65 mW
Y
Typical propagation delay
LS465, 467 (LS95A, 97A) 15 ns
LS466, 468 (LS96A, 98A) 10 ns
Y
Low power-Schottky, TRI-STATE technology
Connection Diagrams
Dual-In-Line Packages
TL/F/6435–1
TL/F/6435–2
TL/F/6435–4
TL/F/6435–3
Order Numbers DM74LS465WM/DM81LS95AWM, DM74LS465N/DM81LS95AN,
DM74LS466WM/DM81LS96AWM, DM74LS466N/DM81LS96AN,
DM74LS467WM/DM81LS97AWM, DM74LS467N/DM81LS97AN,
DM74LS468WM/DM81LS98AWM or DM74LS468N/DM81LS98AN
See NS Package Number M20B or N20A
TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
TL/F/6435
RRD-B30M105/Printed in U. S. A.
Absolute Maximum Ratings (Note)
Supply Voltage
7V
7V
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.
Input Voltage
Operating Free Air Temperature Range
DM74LS/DM81LS
a
0 C to 70 C
§
§
§
b
a
65 C to 150 C
§
Storage Temperature Range
Recommended Operating Conditions
Symbol
Parameter
Supply Voltage
Min
4.75
2
Nom
Max
Units
V
V
V
V
5
5.25
CC
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Free Air Operating Temperature
V
IH
0.8
V
IL
b
I
I
5.2
24
70
mA
mA
OH
OL
T
A
0
C
§
’LS465 (’LS95A) and ’LS467 (’LS97A) Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Typ
Symbol
Parameter
Conditions
Min
Max
Units
(Note 1)
e
e
e b
e
b
1.5
V
V
Input Clamp Voltage
V
Min, I
Min, I
18 mA
V
V
I
CC
I
High Level Output
Voltage
V
V
Max
Min
OH
CC
OH
2.7
e
e
Max, V
IL
IH
e
e
e
V
OL
Low Level Output
Voltage
V
V
Min, I
Max
Min
CC
OL
0.5
e
Max, V
IH
V
IL
e
e
I
12 mA, V
Min
0.4
0.1
20
OL
CC
@
Input Current Max
e
e
I
V
Max, V
7V
I
CC
I
mA
Input Voltage
e
e
e
I
I
High Level Input Current
V
V
Max, V
Max
2.7V
mA
IH
IL
CC
I
e
e
b
Low Level Input
Current
V
0.5V
0.4V
A (Note 3)
A (Note 4)
G
20
50
50
CC
I
I
b
b
V
mA
e
e
I
I
Off-State Output Current
with High Level Output
Voltage Applied
V
V
Max, V
2.4V
OZH
OZL
OS
CC
O
e
e
Min, V
IL
Max
20
mA
mA
IH
e
Max, V
e
Off-State Output Current
with Low Level Output
Voltage Applied
V
V
0.4V
CC
O
e
e
b
20
Min, V
Max
IH
IL
e
(Note 2)
I
I
Short Circuit
V
CC
Max
b
b
20
100
mA
mA
Output Current
e
CC
Supply Current
V
Max (Note 3)
16
26
CC
e
e
25 C.
Note 1: All typicals are at V
5V, T
§
CC
A
Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 3: Both G inputs are at 2V.
Note 4: Both G inputs are at 0.4V.
2
’LS465 and ’LS467 Switching Characteristics
5V, T
e
e
25 C
V
CC
§
A
e
R
L
667X
e
e
L
Symbol
Parameter
C
50 pF
Max
C
150 pF
Max
Units
L
Min
Min
t
t
t
t
t
t
Propagation Delay Time
Low to High Level Output
PLH
PHL
PZH
PZL
PHZ
PLZ
16
28
25
30
20
27
25
40
30
42
ns
ns
ns
ns
ns
ns
Propagation Delay Time
High to Low Level Output
Output Enable Time
to High Level Output
Output Enable Time
to Low Level Output
Output Disable Time
from High Level Output (Note 1)
Output Disable Time
from Low Level Output (Note 1)
e
Note 1: C
5 pF.
L
’LS466 (’LS96A) and ’LS468 (’LS98A) Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Typ
Symbol
Parameter
Conditions
Min
Max
Units
(Note 2)
e
e
e b
e
b
1.5
V
V
Input Clamp Voltage
V
Min, I
Min, I
18 mA
V
V
I
CC
I
High Level Output
Voltage
V
V
Max
Min
OH
CC
OH
2.7
e
e
Max, V
IL
IH
e
e
e
V
OL
Low Level Output
Voltage
V
V
Min, I
Max
Min
CC
OL
0.5
V
e
Max, V
IH
IL
e
e
I
12 mA, V
Min
0.4
0.1
20
OL
CC
@
Input Current Max
e
e
I
V
Max, V
7V
I
CC
I
mA
Input Voltage
e
e
e
I
I
High Level Input Current
V
V
Max, V
Max
2.7V
mA
IH
IL
CC
I
e
e
b
Low Level Input
Current
V
0.5V
0.4V
A (Note 4)
A (Note 5)
G
20
50
50
CC
I
I
b
b
V
mA
e
e
I
I
Off-State Output Current
with High Level Output
Voltage Applied
V
V
Max, V
2.4V
OZH
OZL
OS
CC
O
e
e
Min, V
IL
Max
20
mA
mA
IH
e
Max, V
e
Off-State Output Current
with Low Level Output
Voltage Applied
V
V
0.4V
CC
O
e
e
b
20
Min, V
Max
IH
IL
e
(Note 3)
I
I
Short Circuit
V
CC
Max
b
b
20
100
mA
mA
Output Current
e
CC
Supply Current
V
Max (Note 5)
13
21
CC
e
e
25 C.
Note 2: All typicals are at V
5V, T
§
CC
A
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 4: Both G inputs are at 2V.
Note 5: Both G inputs are at 0.4V.
3
’LS466 and ’LS468 Switching Characteristics
5V, T
e
e
25 C
for test waveforms and output load. V
§
CC
A
e
R
L
667X
e
e
L
Symbol
Parameter
C
50 pF
C
150 pF
Max
Units
L
Min
Max
Min
t
t
t
t
t
t
Propagation Delay Time
PLH
PHL
PZH
PZL
PHZ
PLZ
10
16
30
30
45
ns
ns
ns
ns
ns
ns
Low to High Level Output
Propagation Delay Time
High to Low Level Output
17
15
35
20
27
Output Enable Time
to High Level Output
Output Enable Time
to Low Level Output
Output Disable Time
from High Level Output (Note 1)
Output Disable Time
from Low Level Output (Note 1)
e
Note 1: C
5 pF.
L
Function Tables
LS465 (LS95A)
LS466 (LS96A)
Inputs
G2
Output
Y
Inputs
G2
Output
Y
G1
A
G1
A
H
X
L
X
H
L
X
X
H
L
Hi-Z
Hi-Z
H
H
X
L
X
H
L
X
X
H
L
Hi-Z
Hi-Z
L
L
L
L
L
L
H
LS467 (LS97A)
LS468 (LS98A)
Inputs
Output
Y
Inputs
Output
Y
G
A
G
A
H
L
L
X
H
L
Hi-Z
H
H
L
L
X
H
L
Hi-Z
L
L
H
e
e
e
H
L
High Logic Level
Low Logic Level
X
Either High or Low Logic Level
e
Hi-Z
High Impedance (Off) State
4
Physical Dimensions inches (millimeters)
20-Lead Wide Small Outline Molded Package (M)
Order Numbers DM74LS465WM/DM81LS95AWM, DM74LS466WM/DM81LS96AWM,
DM74LS467WM/DM81LS97AWM or DM74LS468WM/DM81LS98AWM
NS Package Number M20B
5
Physical Dimensions inches (millimeters) (Continued)
20-Lead Molded Dual-In-Line Package (N)
Order Numbers DM74LS465N/DM81LS95AN, DM74LS466N/DM81LS96AN,
DM74LS467N/DM81LS97AN or DM74LS468N/DM81LS98AN
NS Package Number N20A
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