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74AS21 반도체 회로 부품 판매점

DM74AS21



ETC 로고
ETC
74AS21 데이터시트, 핀배열, 회로
April 1984
Revised March 2000
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
s Switching specifications at 50 pF
s Switching specifications guaranteed over full
temperature and VCC range
s Advanced oxide-isolated, ion-implanted Schottky
TTL process
s Functionally and pin for pin compatible with Schottky,
low power Schottky, and advanced low power Schottky
TTL counterpart
s Improved AC performance over Schottky, low power
Schottky and advanced low power Schottky counter-
parts
Ordering Code:
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
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
Inputs
ABC
HHH
LXX
XLX
XXL
XXX
H = HIGH Logic Level
L = LOW Logic Level
X = Either LOW or HIGH Logic Level
D
H
X
X
X
L
Output
Y
H
L
L
L
L
© 2000 Fairchild Semiconductor Corporation DS006277
www.fairchildsemi.com


74AS21 데이터시트, 핀배열, 회로
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
Typical θJA
N Package
84.0°C/W
M Package
114.0°C/W
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 Nom Max
4.5 5 5.5
2
0.8
2
20
0 70
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.
Symbol
Parameter
Conditions
Min Typ
VIK Input Clamp Voltage
VCC = 4.5V, II = −18 mA
VOH HIGH Level
IOH = −2 mA,
Output Voltage
VCC = 4.5V to 5.5V
VOL LOW Level
VCC = 4.5V
Output Voltage
IOL = 20 mA
II Input Current @ Max Input Voltage VCC = 5.5V, VIH = 7V
IIH HIGH Level Input Current VCC = 5.5V, VIH = 2.7V
IIL LOW Level Input Current VCC = 5.5V, VIL = 0.4V
IO Output Drive Current
VCC = 5.5V, VO = 2.25V
ICC Supply Current
VCC = 5.5V
VCC 2
0.35
Outputs HIGH
Outputs LOW
30
2.9
7.4
Switching Characteristics
over recommended operating free air temperature range
Symbol
Parameter
tPLH Propagation Delay Time
LOW-to-HIGH Level Output
tPHL Propagation Delay Time
HIGH-to-LOW Level Output
Conditions
VCC = 4.5V to 5.5V
RL = 500
CL = 50 pF
Min
1
1
Units
V
V
V
mA
mA
°C
Max
1.2
Units
V
V
0.5
0.1
20
0.5
112
4.6
12
V
mA
µA
mA
mA
mA
mA
Max
6
6
Units
ns
ns
www.fairchildsemi.com
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