UNISONIC TECHNOLOGIES CO., LTD
U74AHC21
DUAL 4-INPUT AND GATES
DESCRIPTION
The
U74AHC21
contains two independent 4-input AND gates.
They perform the Boolean function Y=A
B
C
D or
CMOS IC
Y=A
B
C
D
in positive logic.
FEATURES
2~5.5V
I
CC
=2μA (Max.)
* Operation voltage range:
* Low power dissipation:
* ±8mA output drive at 5V
ORDERING INFORMATION
Ordering Number
U74AHC21G-S14-R
U74AHC21G-P14-R
Package
SOP-14
TSSOP-14
Packing
Tape Reel
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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QW-R126-012.A
U74AHC21
PIN CONFIGURATION
1A
1B
NC
1C
1D
1Y
GND
1
2
3
4
5
6
7
14 V
CC
13 2D
12 2C
11 NC
10 2B
9
8
2A
2Y
CMOS IC
FUNCTION TABLE
(each gate)
INPUT(A)
H
L
X
X
X
INPUT(B)
H
X
L
X
X
INPUT(C)
H
X
X
L
X
INPUT(D)
H
X
X
X
L
OUTPUT(Y)
H
L
L
L
L
LOGIC DIAGRAM
(positive logic)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R126-012.A
U74AHC21
ABSOLUTE MAXIMUM RATING
(unless otherwise specified)
PARAMETER
CMOS IC
SYMBOL
RATINGS
UNIT
Supply Voltage
V
CC
-0.5~7
V
Input Clamp Current(V
I
<0)
I
IK
-20
mA
Output Clamp Current(V
O
<0 or V
O
>V
CC
)
I
OK
±20
mA
Output Current
I
OUT
±25
mA
V
CC
or GND Current
I
CC
±50
mA
Storage Temperature
T
STG
-65 ~ +150
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
V
CC
V
IN
V
OUT
t
R
, t
F
T
A
(T
A
= 25°С)
TEST CONDITIONS
V
CC
= 2 V
V
CC
= 3V
V
CC
= 5.5 V
V
CC
= 2 V
V
CC
= 3V
V
CC
= 5.5 V
V
CC
= 2V, I
OH
= 50µA
V
CC
= 3V, I
OH
= 50µA
V
CC
= 4.5V, I
OH
=50µA
V
CC
= 3V, I
OH
= 4mA
V
CC
= 4.5V, I
OH
= 8mA
V
CC
= 2V, I
OH
= 50µA
V
CC
= 3V, I
OH
= 50µA
V
CC
= 4.5V, I
OH
=50µA
V
CC
= 3V, I
OH
= 4mA
V
CC
= 4.5V, I
OH
= 8mA
V
CC
= 6V ,V
IN
= V
CC
or GND
V
CC
= 5.5V, V
IN
= V
CC
or GND, I
OUT
= 0
V
CC
=5V
MIN
1.5
2.1
3.85
TYP
MAX
UNIT
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
uA
µA
pF
CONDITIONS
MIN
2
0
0
TYP
MAX
5.5
Vcc
V
CC
100
20
85
UNIT
V
V
V
ns
ns
°C
Supply Voltage
Input Voltage
Output Voltage
Input Transition Rise or Fall Rate
△
t/
△
V
Operating Temperature
V
CC
=3V±0.3V
V
CC
=5V±0.5V
-40
STATIC CHARACTERISTICS
PARAMETER
SYMBOL
V
IH
High-Level Input Voltage
Low-Level Input Voltage
V
IL
0.5
0.9
1.65
1.9
2.9
4.4
2.58
3.94
0.1
0.1
0.1
0.36
0.36
±0.1
2
4
High-Level Output Voltage
V
OH
Low-Level Output Voltage
V
OL
Input Leakage Current
Quiescent Supply Current
Input Capacitance
I
I(LEAK)
I
cc
C
IN
DYNAMIC CHARACTERISTICS
( Input: t
R
=t
F
=3ns, 25°C, unless otherwise specified )
PARAMETER
SYMBOL
t
PLH
t
PHL
TEST CONDITION
C
L
=15pF
V
CC
=3.3±0.3V
C
L
=50pF
C
L
=15pF
V
CC
=5±0.5V
C
L
=50pF
MIN
TYP
6.2
8.7
4.5
5.8
MAX
8.8
12.3
5.9
7.9
UNIT
ns
ns
ns
ns
Propagation delay from input
(A ,B,C,D) to output(Y)
OPERATING CHARACTERISTICS
(T
A
=25°С, unless otherwise specified)
TEST CONDITION
MIN
TYP
18
MAX
UNIT
pF
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PARAMETER
SYMBOL
Power Dissipation Capacitance
Cpd
No load
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
U74AHC21
TEST CIRCUIT AND WAVEFORMS
Output
C
L
(Note)
CMOS IC
Note : C
L
includes probe and jig capacitance.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R126-012.A
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