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National Semiconductor |
May 1989
54LS368A DM54LS368A DM74LS368A
Hex TRI-STATE 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 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
YeA
Inputs
Output
AG
Y
LL
HL
XH
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-STATE is a registered trademark of National Semiconductor Corporation
C1995 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
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
DM54LS and 54LS
b55 C to a125 C
DM74LS
0 C to a70 C
Storage Temperature Range
b65 C to a150 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
VCC
VIH
VIL
IOH
IOL
TA
Parameter
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Free Air Operating Temperature
DM54LS368A
Min
Nom
Max
45 5 55
2
07
b1
12
b55
125
DM74LS368A
Min Nom Max
4 75 5 5 25
2
08
b2 6
24
0 70
Units
V
V
V
mA
mA
C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
VI Input Clamp Voltage
VOH
High Level Output
Voltage
VOL Low Level Output
Voltage
VCC e Min II e b18 mA
VCC e Min IOH e Max
VIL e Max VIH e Min
VCC e Min IOL e Max
VIL e Max VIH e Min
DM54
DM74
24
IOL e 12 mA VCC e Min
DM74
II
Input Current Max
VCC e Max VI e 7V
Input Voltage
IIH High Level Input
Current
VCC e Max VI e 2 7V
IIL Low Level Input
Current
VCC e Max VI e 0 5V
(Note 4)
A Input
VCC e Max VI e 0 4V
(Note 5)
A Input
IOZH
Off-State Output Current
with High Level Output
Voltage Applied
VCC e Max VI e 0 4V
VCC e Max VO e 2 4V
VIH e Min VIL e Max
G Input
IOZL
Off-State Output Current
with Low Level Output
Voltage Applied
VCC e Max VO e 0 4V
VIH e Min VIL e Max
IOS Short Circuit
Output Current
VCC e Max
(Note 2)
DM54
DM74
b20
b20
ICC Supply Current
VCC e Max (Note 3)
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 3 ICC is measured with the DATA inputs grounded and the OUTPUT CONTROLS at 4 5V
Note 4 Both G inputs are at 2V
Note 5 Both G inputs at 0 4V
Typ
(Note 1)
34
0 25
0 35
0 25
12
Max
b1 5
04
05
04
01
20
b20
b0 4
b0 4
20
b20
b100
b100
21
Units
V
V
V
mA
mA
mA
mA
mA
mA
mA
mA
2
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