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DM74LS20N

Part # DM74LS20N
Description Logic Gates Dl 4-Input NAND Gate
Category IC
Availability In Stock
Qty 46
Manufacturer Available Qty
Fair-Rite Products Corp.
Date Code: 9848
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Fair-Rite Products Corp.
Date Code: 9952
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National Semiconductor Corp
Date Code: 8540
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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 DS006355 www.fairchildsemi.com
June 1986
Revised March 2000
DM74LS20 Dual 4-Input NAND Gate
DM74LS20
Dual 4-Input NAND Gate
General Description
This device contains two independent gates each of which
performs the logic NAND function.
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 = ABCD
H = HIGH Logic Level
L = LOW Logic Level
X = Either LOW or HIGH Logic Level
Order Number Package Number Package Description
DM74LS20M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
DM74LS20N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Inputs Output
ABCDY
XXXLH
XXLXH
XLXXH
LXXXH
HHHHL
www.fairchildsemi.com 2
DM74LS20
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.
Switching Characteristics
at V
CC
= 5V and T
A
= 25°C
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 0.4 mA
I
OL
LOW Level Output Current 8 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,
2.7 3.4 V
Output Voltage V
IL
= Max
V
OL
LOW Level V
CC
= Min, I
OL
= Max,
0.35 0.5
Output Voltage V
IH
= Min V
I
OL
= 4 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 0.36 mA
I
OS
Short Circuit Output Current V
CC
= Max (Note 3) 20 100 mA
I
CCH
Supply Current with Outputs HIGH V
CC
= Max 0.4 0.8 mA
I
CCL
Supply Current with Outputs LOW V
CC
= Max 1.2 2.2 mA
R
L
= 2 k
Symbol Parameter
C
L
= 15 pF C
L
= 50 pF
Units
Min Max Min Max
t
PLH
Propagation Delay Time
310415ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
310415ns
HIGH-to-LOW Level Output
3 www.fairchildsemi.com
DM74LS20
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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