Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74HCT21
CMOS IC
DUAL 4-INPUT AND GATES
„
DESCRIPTION
The U74HCT21 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: 4.5V~5.5V
* Low Quiescent Current: ICC=2μA(Max)
* High Speed:
tPD=15ns @ 4.5V (Typ)
* Low Input Current:
100nA Max
* Inputs are TTL Voltage Compatiabel
„
ORDERING INFORMATION
Ordering Number
Lead Free
U74HCT21L-P14-T
U74HCT21L-P14-R
Halogen Free
U74HCT21G-P14-T
U74HCT21G-P14-R
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Copyright © 2011 Unisonic Technologies Co., Ltd
Package
Packing
TSSOP-14
TSSOP-14
Tube
Tape Reel
1 of 4
QW-R502-656.A
U74HCT21
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PIN CONFIGURATION
1A
1
1B
2
14 VCC
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)
INPUT(D)
OUTPUT(Y)
H
X
X
L
X
H
X
X
X
L
H
L
L
L
L
LOGIC DIAGRAM (positive logic)
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QW-R502-656.A
U74HCT21
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CMOS IC
ABSOLUTE MAXIMUM RATING (unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
Supply Voltage
VCC
-0.5 ~ 7
Input Clamp Current
IIK
-20
Output Clamp Current
IOK
±20
Output Current
IOUT
±25
VCC or GND Current
ICC
±50
Storage Temperature
TSTG
-65 ~ +150
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
Supply Voltage
Input Voltage
Output Voltage
Input Transition Rise or Fall Rate
Operating Temperature
„
High-Level Output Voltage
Low-Level Output Voltage
Input Leakage Current
Quiescent Supply Current
Additional Quiescent Supply
Current
Input Capacitance
MIN
4.5
0
0
TYP
MAX
5.5
Vcc
VCC
500
85
UNIT
V
V
V
ns
℃
MIN
2.0
TYP
MAX
UNIT
V
V
4.4
3.98
4.999
4.3
0.001
0.17
±0.1
-40
SYMBOL
TEST CONDITIONS
VIH
VCC= 4.5V to 5.5V
VIL
VCC= 4.5V to 5.5V
VCC= 4.5V, IO = -20µA
VOH
VCC= 4.5V, IO = -4mA
VCC= 4.5V, IO = 20µA
VOL
VCC= 4.5V, IO = 4mA
VCC= 5.5V ,VIN = VCC or GND
II(LEAK)
ICC
VCC= 5.5V, VIN = VCC or GND, IO = 0
One input at VCC -2.1V,
△ICC
other inputs at 0 or VCC
CIN
VCC=4.5V~5.5V
0.8
V
0.1
0.26
±100
2
nA
µA
100
360
uA
3
10
pF
TYP
MAX
UNIT
15
27
ns
7
15
ns
V
DYNAMIC CHARACTERISTICS (TA=25°С, Input: tR=tF=6ns, unless otherwise specified )
PARAMETER
Propagation delay from
Input(A or B) to Output(Y)
Output Transition Time
„
SYMBOL
CONDITIONS
VCC
VIN
VOUT
tR, tF
VCC=4.5V
TA
STATIC CHARACTERISTICS (TA = 25°С)
PARAMETER
High-Level Input Voltage
Low-Level Input Voltage
„
UNIT
V
mA
mA
mA
mA
℃
SYMBOL
TEST CONDITIONS
MIN
tPLH, tPHL VCC=4.5V, CL=50pF
tT
VCC=4.5V, CL=50pF
OPERATING CHARACTERISTICS (TA=25°С, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITION
Power Dissipation Capacitance
CPD
No Load
UNISONIC TECHNOLOGIES CO., LTD
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RATINGS
42
UNIT
pF
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QW-R502-656.A
U74HCT21
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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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QW-R502-656.A