TL F 6540
54125DM54125DM74125
Quad
TRI-STATE
Buffers
June 1989
54125 DM54125 DM74125
Quad TRI-STATE
Buffers
General Description
This device contains four independent gates each of which
performs a non-inverting buffer function The outputs have
the TRI-STATE feature When enabled the outputs exhibit
the low impedance characteristics of a standard TTL output
with additional drive capability at the high Logic level to per-
mit the driving of bus lines without external pull-up 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 (54125) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Dual-In-Line Package
TL F 6540 1
Order Number 54125DMQB 54125FMQB DM54125J DM54125W or DM74125N
See NS Package Number J14A N14A or W14B
Function Table
Y
e
A
Inputs
Output
A
C
Y
L
L
L
H
L
H
X
H
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
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
5 5V
Operating Free Air Temperature Range
DM54 and 54
b
55 C to
a
125 C
DM74
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
DM54125
DM74125
Units
Min
Nom
Max
Min
Nom
Max
V
CC
Supply Voltage
4 5
5
5 5
4 75
5
5 25
V
V
IH
High Level Input Voltage
2
2
V
V
IL
Low Level Input Voltage
0 8
0 8
V
I
OH
High Level Output Current
b
2
b
5 2
mA
I
OL
Low Level Output Current
16
16
mA
T
A
Free Air Operating Temperature
b
55
125
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
12 mA
b
1 5
V
V
OH
High Level Output
V
CC
e
Min I
OH
e
Max
2 4
3 3
V
Voltage
V
IL
e
Max V
IH
e
Min
V
OL
Low Level Output
V
CC
e
Min I
OL
e
Max
0 2
0 4
V
Voltage
V
IH
e
Min V
IL
e
Max
I
I
Input Current
Max
V
CC
e
Max V
I
e
5 5V
1
mA
Input Voltage
I
IH
High Level Input Current
V
CC
e
Max V
I
e
2 4V
40
m
A
I
IL
Low Level Input Current
V
CC
e
Max V
I
e
0 4V
b
1 6
mA
I
IZL
Off-State Input Current
V
CC
e
Max V
I
e
0 4V
with Low Level Input
b
40
m
A
Voltage Applied
I
OZH
Off-State Output Current
V
CC
e
Max V
O
e
2 4V
with High Level Output
V
IH
e
Min V
IL
e
Max
40
m
A
Voltage Applied
I
OZL
Off-State Output Current
V
CC
e
Max V
O
e
0 4V
with Low Level Output
V
IH
e
Min V
IL
e
Max
b
40
m
A
Voltage Applied
I
OS
Short Circuit
V
CC
e
Max
DM54
b
30
b
70
mA
Output Current
(Note 2)
DM74
b
28
b
70
I
CC
Supply Current
V
CC
e
Max (Note 3)
36
54
mA
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
Note 3
I
CC
is measured with the output control (C) inputs at 4 5V the data inputs grounded and the outputs open
2
Switching Characteristics
at V
CC
e
5V and T
A
e
25 C (See Section 1 for Test Waveforms and Output Load)
R
L
e
400X
Symbol
Parameter
C
L
e
5 pF
C
L
e
50 pF
Units
Min
Max
Min
Max
t
PLH
Propagation Delay Time
15
ns
Low to High Level Output
t
PHL
Propagation Delay Time
18
ns
High to Low Level Output
t
PZH
Output Enable Time to
18
ns
High Level Output
t
PZL
Output Enable Time to
25
ns
Low Level Output
t
PHZ
Output Disable Time from
8
ns
High Level Output
t
PLZ
Output Disable Time from
14
ns
Low Level Output
Physical Dimensions
inches (millimeters)
14-Lead Ceramic Dual-In-Line Package (J)
Order Number 54125DMQB or DM54125J
NS Package Number J14A
3
54125DM54125DM74125
Quad
TRI-STATE
Buffers
Physical Dimensions
inches (millimeters) (Continued)
14-Lead Molded Dual-In-Line Package (N)
Order Number DM74125N
NS Package Number N14A
14-Lead Ceramic Flat Package (W)
Order Number 54125FMQB or DM54125W
NS Package Number W14B
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