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Fairchild Semiconductor Electronic Components Datasheet

74LS20 Datasheet

Dual 4-Input NAND Gate

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June 1986
Revised March 2000
DM74LS20
Dual 4-Input NAND Gate
General Description
This device contains two independent gates each of which
performs the logic NAND function.
Ordering Code:
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
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
Y = ABCD
Inputs
ABC
XXX
XXL
XLX
LXX
HHH
H = HIGH Logic Level
L = LOW Logic Level
X = Either LOW or HIGH Logic Level
D
L
X
X
X
H
Output
Y
H
H
H
H
L
© 2000 Fairchild Semiconductor Corporation DS006355
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

74LS20 Datasheet

Dual 4-Input NAND Gate

No Preview Available !

Absolute Maximum Ratings(Note 1)
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range
65°C to +150°C
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
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
Min
4.75
2
0
Nom
5
Max
5.25
0.8
0.4
8
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
VCC = Min, II = −18 mA
VOH HIGH Level
Output Voltage
VCC = Min, IOH = Max,
VIL = Max
2.7
VOL LOW Level
VCC = Min, IOL = Max,
Output Voltage
VIH = Min
IOL = 4 mA, VCC = Min
II
Input Current @ Max Input Voltage
VCC = Max, VI = 7V
IIH HIGH Level Input Current
VCC = Max, VI = 2.7V
IIL LOW Level Input Current
VCC = Max, VI = 0.4V
IOS Short Circuit Output Current
VCC = Max (Note 3)
20
ICCH
Supply Current with Outputs HIGH
VCC = Max
ICCL
Supply Current with Outputs LOW
VCC = Max
Note 2: All typicals are at VCC = 5V, TA = 25°C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Typ
(Note 2)
3.4
0.35
0.25
0.4
1.2
Max
1.5
0.5
0.4
0.1
20
0.36
100
0.8
2.2
Units
V
V
V
mA
µA
mA
mA
mA
mA
Switching Characteristics
at VCC = 5V and TA = 25°C
Symbol
Parameter
tPLH Propagation Delay Time
LOW-to-HIGH Level Output
tPHL Propagation Delay Time
HIGH-to-LOW Level Output
RL = 2 k
CL = 15 pF
CL = 50 pF
Min Max Min Max
3 10 4 15
3 10 4 15
Units
ns
ns
www.fairchildsemi.com
2


Part Number 74LS20
Description Dual 4-Input NAND Gate
Maker Fairchild Semiconductor
PDF Download

74LS20 Datasheet PDF






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