DM74ALS20A [FAIRCHILD]
Dual 4-Input NAND Gate; 两个4输入与非门
| 型号： | DM74ALS20A |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Dual 4-Input NAND Gate |
| 文件： | 总4页 (文件大小：49K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
October 1986
Revised February 2000
DM74ALS20A
Dual 4-Input NAND Gate
General Description
This device contains two independent gates, each of which
Features
■ Switching specifications at 50 pF
performs the logic NAND function.
■ Switching specifications guaranteed over full tempera-
ture and VCC range
■ Advanced oxide-isolated, ion-implanted Schottky TTL
process
■ Functionally and pin for pin compatible with Schottky
and low power Schottky TTL counterpart
■ Improved AC performance over Schottky and low power
Schottky counterparts
Ordering Code:
Order Number Package Number
Package Description
DM74ALS20AM
DM74ALS20AN
M14A
N14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
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
Output
A
X
X
X
L
B
X
X
L
C
X
L
D
L
Y
H
H
H
H
L
X
X
X
H
X
X
H
X
H
H
H = HIGH Logic Level
L = LOW Logic Level
X = Either LOW or HIGH Logic Level
© 2000 Fairchild Semiconductor Corporation
DS006184
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Absolute Maximum Ratings(Note 1)
Supply Voltage
Input Voltage
7V
7V
Operating Free Air Temperature Range
Storage Temperature Range
Typical θJA
0°C to +70°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.
−65°C to +150°C
N Package
86.5°C/W
M Package
116.0°C/W
Recommended Operating Conditions
Symbol
Parameter
Min
4.5
2
Nom
Max
Units
V
VCC
VIH
VIL
IOH
IOL
TA
Supply Voltage
5
5.5
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Free Air Operating Temperature
V
0.8
−0.4
8
V
mA
mA
°C
0
70
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at VCC = 5V, T = 25°C.
A
Symbol
Parameter
Conditions
= 4.5V, I = −18 mA
Min
Typ
Max
Units
V
V
Input Clamp Voltage
HIGH Level
V
−1.5
V
V
IK
CC
I
I
= −0.4 mA
OH
OH
V
− 2
CC
Output Voltage
V
V
= 4.5V to 5.5V
= 4.5V
CC
CC
V
LOW Level
I
I
= 4 mA
= 8 mA
0.25
0.35
0.4
0.5
V
V
OL
OL
OL
Output Voltage
I
Input Current @ Max
Input Voltage
I
V
= 5.5V, V = 7V
0.1
mA
CC
IH
I
I
I
I
HIGH Level Input Current
LOW Level Input Current
Output Drive Current
Supply Current
V
V
V
V
= 5.5V, V = 2.7V
20
−0.1
−112
0.4
µA
mA
mA
mA
mA
IH
IL
CC
CC
CC
CC
IH
= 5.5V, V = 0.4V
IL
= 5.5V
= 5.5V
V
= 2.25V
O
−30
O
Outputs HIGH
Outputs LOW
0.22
1.2
CC
1.7
Switching Characteristics
over recommended operating free air temperature range.
Symbol
Parameter
Conditions
Min
Max
Units
t
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
V
R
C
= 4.5V to 5.5V
PLH
CC
3
11
10
ns
ns
= 500Ω
= 50 pF
L
L
t
PHL
3
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2
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
Package Number M14A
3
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N14A
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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