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DM74LS125AN

Part # DM74LS125AN
Description IC BUFF TRI-ST QD N-INV 14DIP
Category IC
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National Semiconductor Corp
Date Code: 8416
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

© 2000 Fairchild Semiconductor Corporation DS006387 www.fairchildsemi.com
August 1986
Revised March 2000
DM74LS125A Quad 3-STATE Buffer
DM74LS125A
Quad 3-STATE Buffer
General Description
This device contains four independent gates each of which
performs a non-inverting buffer function. The outputs have
the 3-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-imped-
ance state to the bus line. Thus the output will act neither
as a significant load nor as a driver. To minimize the possi-
bility 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.
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram Function Table
Y = A
H = HIGH Logic Level
L = LOW Logic Level
X = Either LOW or HIGH Logic Level
Hi-Z = 3-STATE (Outputs are disabled)
Order Number Package Number Package Description
DM74LS125AM M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
DM74LS125ASJ M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74LS125AN N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Inputs Output
ACY
LLL
HLH
X H Hi-Z
www.fairchildsemi.com 2
DM74LS125A
Absolute Maximum Ratings(Note 1)
Note 1: 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 tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Recommended Operating Conditions
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Note 2: All typicals are at V
CC
= 5V, T
A
= 25°C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 4: I
CC
is measured with the data control (C) inputs at 4.5V and the data inputs grounded.
Switching Characteristics
at V
CC
= 5V and T
A
= 25°C
Note 5: C
L
= 5pF.
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range 65°C to +150°C
Symbol Parameter Min Nom Max Units
V
CC
Supply Voltage 4.75 5 5.25 V
V
IH
HIGH Level Input Voltage 2 V
V
IL
LOW Level Input Voltage 0.8 V
I
OH
HIGH Level Output Current 2.6 mA
I
OL
LOW Level Output Current 24 mA
T
A
Free Air Operating Temperature 0 70 °C
Symbol Parameter Conditions Min
Typ
Max Units
(Note 2)
V
I
Input Clamp Voltage V
CC
= Min, I
I
= 18 mA 1.5 V
V
OH
HIGH Level V
CC
= Min, I
OH
= Max
2.4 3.4 V
Output Voltage V
IL
= Max, V
IH
= Min
V
OL
LOW Level V
CC
= Min, I
OL
= Max
0.35 0.5
Output Voltage V
IL
= Max V
I
OL
= 12 mA, V
CC
= Min 0.25 0.4
I
I
Input Current @ Max Input Voltage V
CC
= Max, V
I
= 7V 0.1 mA
I
IH
HIGH Level Input Current V
CC
= Max, V
I
= 2.7V 20 µA
I
IL
LOW Level Input Current V
CC
= Max, V
I
= 0.4V 0.4 mA
I
OZH
Off-State Output Current with V
CC
= Max, V
O
= 2.4V
20 µA
HIGH Level Output Voltage Applied V
IH
= Min, V
IL
= Max
I
OZL
Off-State Output Current with V
CC
= Max, V
O
= 0.4V
20 µA
LOW Level Output Voltage Applied V
IH
= Min, V
IL
= Max
I
OS
Short Circuit Output Current V
CC
= Max (Note 3) 20 100 mA
I
CC
Supply Current V
CC
= Max (Note 4) 11 20 mA
R
L
= 667
Symbol Parameter C
L
= 50 pF C
L
= 150 pF Units
Min Max Min Max
t
PLH
Propagation Delay Time LOW-to-HIGH Level Output 15 21 ns
t
PHL
Propagation Delay Time HIGH-to-LOW Level Output 18 22 ns
t
PZH
Output Enable Time to HIGH Level Output 25 35 ns
t
PZL
Output Enable Time to LOW Level Output 25 40 ns
t
PHZ
Output Disable Time from HIGH Level Output (Note 5) 20 ns
t
PLZ
Output Disable Time from LOW Level Output (Note 5) 20 ns
3 www.fairchildsemi.com
DM74LS125A
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
Package Number M14A
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