NSC 54LS368ADMQB

54LS368A/DM54LS368A/DM74LS368A
Hex TRI-STATEÉ Inverting Buffers
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 significant 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 available. 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
YeA
Inputs
Output
A
G
Y
L
H
X
L
L
H
H
L
Hi-Z
H e High Logic Level
L e Low Logic Level
X e Either Low or High Logic Level
Hi-Z e TRI-STATE (Outputs are disabled)
TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.
C1995 National Semiconductor Corporation
TL/F/6430
RRD-B30M105/Printed in U. S. A.
54LS368A/DM54LS368A/DM74LS368A Hex TRI-STATE Inverting Buffers
May 1989
Absolute Maximum Ratings (Note)
Note: The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaranteed. 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.
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
b 55§ C to a 125§ C
DM54LS and 54LS
DM74LS
0§ C to a 70§ C
Storage Temperature Range
b 65§ C to a 150§ C
Recommended Operating Conditions
Symbol
DM54LS368A
Parameter
DM74LS368A
Units
Min
Nom
Max
Min
Nom
Max
4.5
5
5.5
4.75
5
5.25
VCC
Supply Voltage
VIH
High Level Input Voltage
VIL
Low Level Input Voltage
0.7
0.8
V
IOH
High Level Output Current
b1
b 2.6
mA
IOL
Low Level Output Current
24
mA
TA
Free Air Operating Temperature
70
§C
2
2
V
12
b 55
125
V
0
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
(Note 1)
Max
Units
b 1.5
V
VI
Input Clamp Voltage
VCC e Min, II e b18 mA
VOH
High Level Output
Voltage
VCC e Min, IOH e Max
VIL e Max, VIH e Min
VOL
Low Level Output
Voltage
VCC e Min, IOL e Max
VIL e Max, VIH e Min
DM54
0.25
0.4
DM74
0.35
0.5
IOL e 12 mA, VCC e Min
DM74
0.25
0.4
2.4
3.4
V
V
II
Input Current @ Max
Input Voltage
VCC e Max, VI e 7V
0.1
mA
IIH
High Level Input
Current
VCC e Max, VI e 2.7V
20
mA
IIL
Low Level Input
Current
VCC e Max, VI e 0.5V
(Note 4)
A Input
b 20
mA
VCC e Max, VI e 0.4V
(Note 5)
A Input
VCC e Max, VI e 0.4V
VCC e Max, VO e 2.4V
VIH e Min, VIL e Max
G Input
IOZH
IOZL
IOS
ICC
Off-State Output Current
with High Level Output
Voltage Applied
Off-State Output Current
with Low Level Output
Voltage Applied
VCC e Max, VO e 0.4V
VIH e Min, VIL e Max
Short Circuit
Output Current
VCC e Max
(Note 2)
Supply Current
VCC e Max (Note 3)
b 0.4
2
mA
b 20
mA
b 20
b 100
DM74
b 20
b 100
Note 3: ICC is measured with the DATA inputs grounded and the OUTPUT CONTROLS at 4.5V.
Note 5: Both G inputs at 0.4V.
20
DM54
Note 1: All typicals are at VCC e 5V, TA e 25§ C.
Note 2: 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.
mA
b 0.4
12
21
mA
mA
Switching Characteristics at VCC e 5V and TA e 25§ C (See Section 1 for Test Waveforms and Output Load)
RL e 667X
Symbol
Parameter
CL e 50 pF
Min
Max
CL e 150 pF
Min
Units
Max
tPLH
Propagation Delay Time Low
to High Level Output
15
25
ns
tPHL
Propagation Delay Time High
to Low Level Output
18
25
ns
tPZH
Output Enable Time to
High Level Output
30
35
ns
tPZL
Output Enable Time to
Low Level Output
30
40
ns
tPHZ
Output Disable Time from
High Level Output (Note 6)
20
ns
tPLZ
Output Disable Time from
Low Level Output (Note 6)
20
ns
Note 6: CL e 5 pF.
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
54LS368A/DM54LS368A/DM74LS368A Hex TRI-STATE Inverting Buffers
Physical Dimensions inches (millimeters) (Continued)
16-Lead Ceramic Flat Package (W)
Order Number 54LS368AFMQB or DM54LS368AW
NS Package Number W16A
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