Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74AHCT1G126
CMOS IC
SINGLE BUS BUFFER GATE
WITH 3-STATE OUTPUT

DESCRIPTION
The UTC U74AHCT1G126 is a single bus buffer gate with
3-state output controlled by enable input (OE), When OE is LOW
and the output is disabled.

FEATURES
* Operation Voltage Range: 4.5~5.5V
* Low Power Dissipation:
ICC=1μA (Max.) @25°C
* Inputs are TTL-Voltage Compatible

ORDERING INFORMATION
Ordering Number
U74AHCT1G125G-AF5-R
U74AHCT1G125G-AL5-R

Package
SOT-25
SOT-353
Packing
Tape Reel
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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U74AHCT1G126

CMOS IC
PIN CONFIGURATION
VCC
5
1
OE

2
A
3
GND
FUNCTION TABLE (each gate)
INPUT
OE
H
H
L

Y
4
A
L
H
X
OUTPUT
Y
L
H
Z
LOGIC DIAGRAM (positive logic)
Logic symbol
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IEC logic symbol
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CMOS IC
ABSOLUTE MAXIMUM RATINGS (unless otherwise specified)(Note 1)
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
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
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.

RECOMMENDED OPERATING COMDITIONS
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
Input Transition Rise or Fall Rate
Operating Temperature

SYMBOL
CONDITIONS
VCC
VIN
VOUT
t/v
VCC=5.0±0.5V
TA
TYP
MAX
5.5
5.5
VCC
20
85
UNIT
V
V
V
ns/V
°C
MIN
2
TYP
MAX
UNIT
V
V
4.4
3.94
4.5
-40
STATIC CHARACTERISTICS (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
High-Level
VIH
VCC=4.5V~5.5V
Input Voltage
Low-Level
VIL
VCC=4.5V~5.5V
VCC=4.5V, IOH=-50μA
High-Level
VOH
VCC=4.5V, IOH=-8mA
Output Voltage
VCC=4.5V, IOL=50μA
Low-Level
VOL
VCC=4.5V, IOH=8mA
Input Leakage Current
II(LEAK) VCC=0V~5.5V, VIN=VCC or GND
Output Current, OFF-state
IOZ
VCC=5.5V, VOUT=VCC or GND
VCC=5.5V, VIN=VCC or GND
Quiescent Supply Current
IQ
IOUT=0
VCC=5.5V, One input at 3.4V,
Additional Quiescent Supply
∆ICC
Current
Other input at VCC or GND
Input Capacitance
CIN
VCC=5V, VIN=VCC or GND
Output Capacitance
COUT
VCC=5V, VOUT=VCC or GND

MIN
4.5
0
0
0.8
4
10
V
0.1
0.36
±0.1
±0.25
μA
μA
1
μA
1.35
mA
10
pF
pF
V
DYNAMIC CHARACTERISTICS (TA=25°C, Input: tR, tF≤3ns; PRR≤1MHz, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
tPLH
Propagation delay from A to Y
tPHL
tPZH
VCC=5V±0.5V, CL=15pF
Turn-on time OE to Y
tPZL
tPHZ
Turn-off time OE to Y
tPLZ
tPLH
Propagation delay from A to Y
tPHL
tPZH
VCC=5V±0.5V, CL=50pF
Turn-on time OE to Y
tPZL
tPHZ
Turn-off time OE to Y
tPLZ
OPERATING CHARACTERISTICS
Power Dissipation Capacitance
CPD
No load, f=1MHz, VCC=5V
UNISONIC TECHNOLOGIES CO., LTD
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MIN
TYP
3.8
3.8
3.6
3.6
4.6
4.6
5.3
5.3
5.1
5.1
6.1
6.1
14
MAX
5.5
5.5
5.1
5.1
6.8
6.8
7.5
7.5
7.1
7.1
8.8
8.8
UNIT
ns
ns
ns
ns
ns
ns
pF
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CMOS IC
TEST CIRCUIT AND WAVEFORMS
Note: CL includes probe and jig capacitance.
Fig-1 Propagation delay from A to Y
Fig-2 The turn-on and turn-off times.
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U74AHCT1G126
CMOS IC
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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