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DM74AS21N

Part # DM74AS21N
Description IC GATE AND 2CH 4-INP 14-DIP
Category IC
Availability In Stock
Qty 15
Qty Price
1 + $0.93647
Manufacturer Available Qty
National Semiconductor Corp
Date Code: 9818
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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 DS006277 www.fairchildsemi.com
April 1984
Revised March 2000
DM74AS21 Dual 4-Input AND Gate
DM74AS21
Dual 4-Input AND Gate
General Description
This device contains two independent 4-input gates, each
of which performs the logic AND function.
Features
Switching specifications at 50 pF
Switching specifications guaranteed over full
temperature and V
CC
range
Advanced oxide-isolated, ion-implanted Schottky
TTL process
Functionally and pin for pin compatible with Schottky,
low power Schottky, and advanced low power Schottky
TTL counterpart
Improved AC performance over Schottky, low power
Schottky and advanced low power Schottky counter-
parts
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram Function Table
H = HIGH Logic Level
L = LOW Logic Level
X = Either LOW or HIGH Logic Level
Order Number Package Number Package Description
DM74AS21M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74AS21N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Inputs Output
ABCD Y
HHHH H
LXXX L
XLXX L
XXLX L
XXXL L
www.fairchildsemi.com 2
DM74AS21
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. All typical values are measured at V
CC
= 5V, T
A
= 25°C.
Switching Characteristics
over recommended operating free air temperature range
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range 65°C to +150°C
Typical θ
JA
N Package 84.0°C/W
M Package 114.0°C/W
Symbol Parameter Min Nom Max Units
V
CC
Supply Voltage 4.5 5 5.5 V
V
IH
HIGH Level Input Voltage 2 V
V
IL
LOW Level Input Voltage 0.8 V
I
OH
HIGH Level Output Current 2mA
I
OL
LOW Level Output Current 20 mA
T
A
Free Air Operating Temperature 0 70 °C
Symbol Parameter Conditions Min Typ Max Units
V
IK
Input Clamp Voltage V
CC
= 4.5V, I
I
= 18 mA 1.2 V
V
OH
HIGH Level I
OH
= 2 mA,
V
CC
2V
Output Voltage V
CC
= 4.5V to 5.5V
V
OL
LOW Level V
CC
= 4.5V
0.35 0.5 V
Output Voltage I
OL
= 20 mA
I
I
Input Current @ Max Input Voltage V
CC
= 5.5V, V
IH
= 7V 0.1 mA
I
IH
HIGH Level Input Current V
CC
= 5.5V, V
IH
= 2.7V 20 µA
I
IL
LOW Level Input Current V
CC
= 5.5V, V
IL
= 0.4V 0.5 mA
I
O
Output Drive Current V
CC
= 5.5V, V
O
= 2.25V 30 112 mA
I
CC
Supply Current V
CC
= 5.5V Outputs HIGH 2.9 4.6 mA
Outputs LOW 7.4 12 mA
Symbol Parameter Conditions Min Max Units
t
PLH
Propagation Delay Time V
CC
= 4.5V to 5.5V
16ns
LOW-to-HIGH Level Output R
L
= 500
t
PHL
Propagation Delay Time C
L
= 50 pF
16ns
HIGH-to-LOW Level Output
3 www.fairchildsemi.com
DM74AS21
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
Package Number M14A
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