54LS368ALMQB [NSC]
Hex TRI-STATE Inverting Buffers; 十六进制三态反相缓冲器
| 型号： | 54LS368ALMQB |
| 厂家： | 
National Semiconductor |
| 描述： | Hex TRI-STATE Inverting Buffers |
| 文件： | 总6页 (文件大小：140K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
May 1989
54LS368A/DM54LS368A/DM74LS368A
Hex TRI-STATE Inverting Buffers
É
General Description
This device contains six independent gates each of which
performs an inverting buffer function. The outputs have the
TRI-STATE feature. When enabled, the outputs exhibit the
low impedance characteristics of a standard LS output with
additional drive capability to permit the driving of bus lines
without external resistors. When disabled, both the output
transistors are turned off presenting a high-impedance state
to the bus line. Thus the output will act neither as a signifi-
cant load nor as a driver. To minimize the possibility that two
outputs will attempt to take a common bus to opposite logic
levels, the disable time is shorter than the enable time of the
outputs.
Features
Y
Alternate Military/Aerospace device (54LS368) is avail-
able. Contact a National Semiconductor Sales Office/
Distributor for specifications.
Connection Diagram
Dual-In-Line Package
TL/F/6430–1
Order Number 54LS368ADMQB, 54LS368AFMQB, 54LS368ALMQB,
DM54LS368AJ, DM54LS368AW, DM74LS368AM or DM74LS368AN
See NS Package Number E20A, J16A, M16A, N16E or W16A
Function Table
e
Y
A
Inputs
Output
Y
A
G
L
H
X
L
L
H
L
H
Hi-Z
e
e
e
H
L
High Logic Level
Low Logic Level
X
Either Low or High Logic Level
e
Hi-Z
TRI-STATE (Outputs are disabled)
TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
TL/F/6430
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.
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.
Supply Voltage
Input Voltage
7V
7V
Operating Free Air Temperature Range
DM54LS and 54LS
DM74LS
b
b
a
a
55 C to 125 C
§
§
0 C to 70 C
§
§
a
65 C to 150 C
Storage Temperature Range
§
§
Recommended Operating Conditions
DM54LS368A
DM74LS368A
Symbol
Parameter
Units
Min
4.5
2
Nom
Max
Min
4.75
2
Nom
Max
V
V
V
Supply Voltage
5
5.5
5
5.25
V
V
CC
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Free Air Operating Temperature
IH
0.7
0.8
V
IL
b
b
I
I
1
2.6
24
70
mA
mA
OH
OL
12
b
T
A
55
125
0
C
§
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Typ
(Note 1)
Symbol
Parameter
Conditions
Min
Max
Units
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
2.4
3.4
e
e
Max, V
IL
IH
e
e
e
V
OL
Low Level Output
Voltage
V
V
Min, I
Max
Min
DM54
DM74
DM74
0.25
0.35
0.25
0.4
CC
OL
e
Max, V
IH
IL
0.5
0.4
V
e
e
I
12 mA, V
Min
OL
CC
@
Input Current Max
Input Voltage
e
e
I
I
I
V
V
V
Max, V
Max, V
Max, V
7V
I
CC
I
I
I
I
0.1
20
mA
mA
mA
e
e
e
e
e
High Level Input
Current
2.7V
0.5V
0.4V
0.4V
IH
IL
CC
CC
e
(Note 4)
Low Level Input
Current
A Input
A Input
G Input
b
20
e
(Note 5)
V
CC
Max, V
b
b
0.4
0.4
mA
e
e
V
CC
Max, V
Max, V
I
e
I
I
Off-State Output Current
with High Level Output
Voltage Applied
V
CC
V
IH
2.4V
Max
OZH
OZL
O
e
e
Min, V
IL
20
mA
mA
e
Max, V
e
Off-State Output Current
with Low Level Output
Voltage Applied
V
CC
V
IH
0.4V
Max
O
e
e
b
20
Min, V
IL
e
(Note 2)
b
b
b
b
I
I
Short Circuit
Output Current
V
CC
Max
DM54
DM74
20
20
100
100
OS
CC
mA
mA
e
Supply Current
V
CC
Max (Note 3)
12
21
e
e
25 C.
Note 1: All typicals are at V
5V, T
§
CC
Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 3: I is measured with the DATA inputs grounded and the OUTPUT CONTROLS at 4.5V.
A
CC
Note 4: Both G inputs are at 2V.
Note 5: Both G inputs at 0.4V.
2
e
e
25 C (See Section 1 for Test Waveforms and Output Load)
Switching Characteristics at V
5V and T
§
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
15
18
30
30
20
20
25
25
35
40
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 6)
Output Disable Time from
Low Level Output (Note 6)
e
Note 6: C
5 pF.
L
3
Physical Dimensions inches (millimeters)
Ceramic Leadless Chip Carrier Package (E)
Order Number 54LS368ALMQB
NS Package Number E20A
16-Lead Ceramic Dual-In-Line Package (J)
Order Number 54LS368ADMQB or DM54LS368AJ
NS Package Number J16A
4
Physical Dimensions inches (millimeters) (Continued)
16-Lead Small Outline Molded Package (M)
Order Number DM74LS368AM
NS Package Number M16A
16-Lead Molded Dual-In-Line Package (N)
Order Number DM74LS368AN
NS Package Number N16E
5
Physical Dimensions inches (millimeters) (Continued)
16-Lead Ceramic Flat Package (W)
Order Number 54LS368AFMQB or DM54LS368AW
NS Package Number W16A
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and whose
failure to perform, when properly used in accordance
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.
2. A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or
effectiveness.
National Semiconductor
Corporation
National Semiconductor
Europe
National Semiconductor
Hong Kong Ltd.
National Semiconductor
Japan Ltd.
a
1111 West Bardin Road
Arlington, TX 76017
Tel: 1(800) 272-9959
Fax: 1(800) 737-7018
Fax:
(
49) 0-180-530 85 86
@
13th Floor, Straight Block,
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Tel: (852) 2737-1600
Fax: (852) 2736-9960
Tel: 81-043-299-2309
Fax: 81-043-299-2408
Email: cnjwge tevm2.nsc.com
a
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Deutsch Tel:
English Tel:
Fran3ais Tel:
Italiano Tel:
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(
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49) 0-180-530 85 85
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National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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