NSC DM54125J Quad tri-state buffer Datasheet

54125/DM54125/DM74125
Quad TRI-STATEÉ 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 permit 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 available. 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
YeA
Inputs
Output
A
C
Y
L
H
X
L
L
H
L
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-STATEÉ is a registered trademark of National Semiconductor Corporation.
C1995 National Semiconductor Corporation
TL/F/6540
RRD-B30M105/Printed in U. S. A.
54125/DM54125/DM74125 Quad TRI-STATE Buffers
June 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
5.5V
Operating Free Air Temperature Range
b 55§ C to a 125§ C
DM54 and 54
DM74
0§ C to a 70§ C
Storage Temperature Range
b 65§ C to a 150§ C
Recommended Operating Conditions
Symbol
DM54125
Parameter
DM74125
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
0.8
0.8
V
IOH
High Level Output Current
b2
b 5.2
mA
IOL
Low Level Output Current
16
mA
TA
Free Air Operating Temperature
70
§C
2
2
V
16
b 55
125
V
0
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
VI
Input Clamp Voltage
VCC e Min, II e b12 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
VIH e Min, VIL e Max
II
Input Current @ Max
Input Voltage
IIH
High Level Input Current
IIL
Low Level Input Current
IIZL
Off-State Input Current
with Low Level Input
Voltage Applied
VCC e Max, VI e 0.4V
Off-State Output Current
with High Level Output
Voltage Applied
IOZH
IOZL
IOS
ICC
Min
2.4
Typ
(Note 1)
Max
Units
b 1.5
V
3.3
0.2
V
0.4
V
VCC e Max, VI e 5.5V
1
mA
VCC e Max, VI e 2.4V
VCC e Max, VI e 0.4V
40
mA
b 1.6
mA
b 40
mA
VCC e Max, VO e 2.4V
VIH e Min, VIL e Max
40
mA
Off-State Output Current
with Low Level Output
Voltage Applied
VCC e Max, VO e 0.4V
VIH e Min, VIL e Max
b 40
mA
Short Circuit
Output Current
VCC e Max
(Note 2)
Supply Current
VCC e Max (Note 3)
DM54
b 30
b 70
DM74
b 28
b 70
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.
Note 3: ICC is measured with the output control (C) inputs at 4.5V, the data inputs grounded, and the outputs open.
2
36
54
mA
mA
Switching Characteristics at VCC e 5V and TA e 25§ C (See Section 1 for Test Waveforms and Output Load)
RL e 400X
Symbol
Parameter
CL e 5 pF
Min
CL e 50 pF
Max
Min
Units
Max
tPLH
Propagation Delay Time
Low to High Level Output
15
ns
tPHL
Propagation Delay Time
High to Low Level Output
18
ns
tPZH
Output Enable Time to
High Level Output
18
ns
tPZL
Output Enable Time to
Low Level Output
25
ns
tPHZ
Output Disable Time from
High Level Output
8
ns
tPLZ
Output Disable Time from
Low Level Output
14
ns
Physical Dimensions inches (millimeters)
14-Lead Ceramic Dual-In-Line Package (J)
Order Number 54125DMQB or DM54125J
NS Package Number J14A
3
54125/DM54125/DM74125 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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