Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74AHC20
CMOS IC
DUAL 4-INPUT NAND GATES

DESCRIPTION
The U74AHC20 contains two independent 4-input NAND 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 power dissipation:
* ±8mA output drive at 5V

2~5.5V
ICC=2μA (Max.)
ORDERING INFORMATION
Ordering Number
U74AHC20G-S14-R
U74AHC20G-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-R126-011.A
U74AHC20


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 (each gate)
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)
L
H
H
H
H
LOGIC DIAGRAM (positive logic)
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QW-R126-011.A
U74AHC20

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(VI<0)
IIK
-20
mA
Output Clamp Current(VO<0 or VO>VCC)
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 △t/△V
Operating Temperature

TYP
MAX
5.5
Vcc
VCC
100
20
85
UNIT
V
V
V
ns
ns
°C
TYP
MAX
0.1
0.1
0.1
0.36
0.36
±0.1
2
4
UNIT
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
uA
µA
pF
TYP
6.2
8.7
4.5
5.8
MAX
8.8
12.3
5.9
7.9
UNIT
ns
ns
ns
ns
TYP
18
MAX
UNIT
pF
VCC=3V±0.3V
VCC=5V±0.5V
TA
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)
ICC
CIN
-40
TEST CONDITIONS
VCC= 2 V
VCC= 3V
VCC= 5.5 V
VCC= 2 V
VCC= 3V
VCC= 5.5 V
VCC= 2V, IOH = 50µA
VCC= 3V, IOH = 50µA
VCC= 4.5V, IOH =50µA
VCC= 3V, IOH = 4mA
VCC= 4.5V, IOH = 8mA
VCC= 2V, IOH = 50µA
VCC= 3V, IOH = 50µA
VCC= 4.5V, IOH =50µA
VCC= 3V, IOH = 4mA
VCC= 4.5V, IOH = 8mA
VCC= 6V ,VIN = VCC or GND
VCC= 5.5V, VIN = VCC or GND, IOUT = 0
VCC=5V
MIN
1.5
2.1
3.85
0.5
0.9
1.65
1.9
2.9
4.4
2.58
3.94
DYNAMIC CHARACTERISTICS ( Input: tR=tF=3ns, 25°C, unless otherwise specified )
PARAMETER
Propagation delay from input
(A ,B,C,D) to output(Y)

MIN
2
0
0
STATIC CHARACTERISTICS (TA = 25°С, unless otherwise specified)
PARAMETER

tR, tF
CONDITIONS
SYMBOL
tPLH
tPHL
TEST CONDITION
CL=15pF
VCC=3.3±0.3V
CL=50pF
CL=15pF
VCC=5±0.5V
CL=50pF
MIN
OPERATING CHARACTERISTICS (TA=25°С, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITION
Power Dissipation Capacitance
Cpd
No load, f=1MHz
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
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QW-R126-011.A
U74AHC20

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.
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www.unisonic.com.tw
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QW-R126-011.A
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