Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74HC21
CMOS IC
DUAL 4-INPUT AND GATES

DESCRIPTION
The U74HC21 contains two independent 4-input AND gates.They
perform the Boolean function Y=A  B  C  D or Y=A  B  C  D in
positive logic.

FEATURES
* Operation Voltage Range:
* Low Quiescent Current:
* High Speed:
* Low Input Current:

2~6V
ICC=2µA(Max)
tPD=11ns(Typ)
100nA Max
ORDERING INFORMATION
Ordering Number
U74HC21G-S14-R
U74HC21G-P14-R

Package
SOP-14
TSSOP-14
Packing
Tape Reel
Tape Reel
MARKING
SOP-14
14 13
12
11
10
9
8
UTC
U74HC21G
1
2
3
4
5
6
7
TSSOP-14
14 13 12 11 10 9
Date Code
Lot Code
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
8
UTC
U74HC21G
1
2 3
4
5
6
7
Date Code
Lot Code
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QW-R502-632.D
U74HC21


PIN CONFIGURATION
1A
1
14 VCC
1B
2
13 2D
NC
3
12 2C
1C
4
11 NC
1D
5
10 2B
1Y
6
9
2A
GND
7
8
2Y
FUNCTION TABLE
INPUT(A)
H
L
X
X
X

CMOS IC
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
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www.unisonic.com.tw
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QW-R502-632.D
U74HC21

CMOS IC
ABSOLUTE MAXIMUM RATING (TA = 25°С ,unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
-0.5~7
V
Input Clamp Current
IIK
-20
mA
Output Clamp Current
IOK
±20
mA
Output Current
IOUT
±25
mA
VCC or GND Current
ICC
±50
mA
Storage Temperature
TSTG
-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
VCC
VIN
VOUT
Supply Voltage
Input Voltage
Output Voltage
Input Transition Rise or Fall Rate
tR, tF
Operating Temperature

MIN
2
0
0
TYP
VCC=2V
VCC=4.5V
VCC=6V
TA
-40
MAX
6
Vcc
VCC
1000
500
400
85
UNIT
V
V
V
ns
°C
THERMAL DATA
PARAMETER
Junction to Ambient

CONDITIONS
SYMBOL
SOP-14
TSSOP-14
θJA
RATINGS
76
113
UNIT
°C/W
STATIC CHARACTERISTICS (TA = 25°С)
PARAMETER
SYMBOL
High-Level Input Voltage
VIH
Low-Level Input Voltage
VIL
High-Level Output Voltage
VOH
Low-Level Output Voltage
VOL
Input Leakage Current
Quiescent Supply Current
Input Capacitance
II(LEAK)
IQ
CIN
TEST CONDITIONS
VCC= 2 V
VCC= 4.5V
VCC= 6 V
VCC= 2 V
VCC= 4.5 V
VCC= 6 V
VCC= 2V, IOH = 20µA
VCC= 4.5V, IOH = 20µA
VCC= 6V, IOH = 20µA
VCC= 4.5V, IOH = 4mA
VCC= 6V, IOH = 5.2mA
VCC= 2V, IOL = 20µA
VCC= 4.5V, IOL = 20µA
VCC= 6V, IOL = 20µA
VCC= 4.5V, IOL = 4mA
VCC= 6V, IOL = 5.2mA
VCC= 6V ,VIN = VCC or GND
VCC= 6V, VIN = VCC or GND, IOUT = 0
VCC=2V~6V
UNISONIC TECHNOLOGIES CO., LTD
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MIN
1.5
3.15
4.2
TYP
MAX
V
0.5
1.35
1.8
1.9
4.4
5.9
3.98
5.48
UNIT
1.998
4.999
5.999
4.3
5.8
0.002
0.001
0.001
0.17
0.15
±0.1
3
V
V
0.1
0.1
0.1
0.26
0.26
±100
2
10
V
nA
µA
pF
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U74HC21

DYNAMIC CHARACTERISTICS (TA=25°С, Input: tR=tF=6ns, unless otherwise specified )
PARAMETER
Propagation delay from
Input(A, B, C or D) to Output(Y)
Output Transition Time

CMOS IC
SYMBOL
tPLH / tPHL
tT
TEST CONDITIONS
VCC=2V, CL=50pF
VCC=4.5V, CL=50pF
VCC=6V, CL=50pF
VCC=2V, CL=50pF
VCC=4.5V, CL=50pF
VCC=6V, CL=50pF
MIN
TYP
44
14
11
29
10
8
MAX
110
22
19
75
15
13
UNIT
ns
ns
OPERATING CHARACTERISTICS (TA=25°С, unless otherwise specified)
PARAMETER
Power Dissipation Capacitance
SYMBOL
TEST CONDITION
CPD
No Load
UNISONIC TECHNOLOGIES CO., LTD
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RATINGS
25
UNIT
pF
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U74HC21

CMOS IC
TEST CIRCUIT AND WAVEFORMS
Output
CL (Note)
Note : CL 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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