Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74AHCT02
CMOS IC
QUADRUPLE 2-INPUT
POSITIVE-NOR GATES

DESCRIPTION
The U74AHCT02 contains four independent 2-input NOR gates.
Each gate provides the function Y=A+B in positive logic.

SOP-14
FEATURES
* Inputs Are TTL-Voltage Compatible
* Low Power Dissipation
* Balanced Propagation Delays

ORDERING INFORMATION
Ordering Number
U74AHCT02G-S14-R

Package
SOP-14
Packing
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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QW-R502-452.B
U74AHCT02


CMOS IC
PIN CONFIGURATION
1Y 1
14 VCC
1A 2
13 4Y
1B 3
12 4B
2Y 4
11 4A
2A 5
10 3Y
2B 6
9
3B
GND 7
8
3A
FUNCTION TABLE (Each Gate)
INPUTS A
INPUTS B
OUTPUT
L
L
H
L
H
L
H
L
L
H
H
L
Note: H: HIGH voltage level; L: LOW voltage level.

LOGIC SYMBOL (Positive Logic)
Logic Symbol

Y
IEC Logic Symbol
LOGIC DIAGRAM (One Gate)
A
Y
B
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U74AHCT02

CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
-0.5 ~ +7
V
Input Voltage
VIN
-0.5 ~ +7
V
Output Voltage
VOUT
-0.5 ~ VCC +0.5
V
VCC or GND Current
ICC
±50
mA
Output Current (VOUT=0 ~ VCC)
IOUT
±25
mA
Input Clamping Current (VIN < 0V)
IIK
-20
mA
Output Clamping Current (VOUT<0 or VOUT> VCC)
IOK
±20
mA
Storage Temperature
TSTG
-65 ~ + 150
°C
Notes: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are
observed.
2. 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.

THERMAL DATA
PARAMETER
Junction to Ambient

UNIT
°C/W
SYMBOL
VCC
VIN
VOUT
VIH
VIL
IOH
IOL
t R / tF
TOPR
CONDITIONS
VCC =4.5V to 5.5V
VCC =4.5V to 5.5V
MIN
4.5
0
0
2.0
TYP
5.0
MAX UNIT
5.5
V
5.5
V
VCC
V
V
0.8
V
-8
mA
8
mA
20
ns/V
+85
°C
TYP
4.5
MAX
VCC=5.0±0.5V
-40
STATIC CHARACTERISTICS (TA=25°C)
PARAMETER
SYMBOL
High-Level Output Voltage
VOH
Low-Level Output Voltage
VOL
Input Leakage Current
Quiescent Supply Current
Additional Quiescent Supply
Current Per Input Pin
Input Capacitance

RATINGS
76
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
High-Level Input Voltage
Low-Level Input Voltage
High-Level Input Current
Low-Level Input Current
Input Transition Rise or Fall Rate
Ambient Operating Temperature

SYMBOL
θJA
II(LEAK)
IQ
∆IQ
CIN
TEST CONDITIONS
IOH=-50μA
VCC =4.5V
IOH =-8mA
VCC =4.5V
IOL=50μA
VCC =4.5V
IOL =8mA
VCC =4.5V
VIN= VCC or GND,VCC =0V to 5.5V
VIN=VCC or GND,IOUT=0,VCC =5.5V
One input at 3.4V, other inputs at
VCC or GND, IOUT=0, VCC = 5.5V
VIN = VCC or GND, VCC = 5V
MIN
4.4
3.94
0.1
0.36
±0.1
2
UNIT
V
V
V
V
μA
μA
1.35
mA
4
10
pF
TYP
MAX
5.5
7.5
UNIT
SWITCHING CHARACTERISTICS (TA=25°C)
PARAMETER
Propagation Delay, From Input(A
and B) To Output(Y)
Power Dissipation Capacitance
SYMBOL
tPLH / tPHL
CPD
TEST CONDITIONS
CL=15 pF
VCC =5±0.5 V
CL=50 pF
f =1MHz, No load
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
17
ns
pF
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U74AHCT02

CMOS IC
TEST CIRCUIT AND WAVEFORMS
From Output
CL
Test circuit for measuring propagation delay
Waveforms showing the Input(A and B) to Output(Y) propagation delays
Notes: 1. CL includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics: PRR ≤1MHz, Zo = 50Ω,
tR ≤3ns, tF ≤3ns.
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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