Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74AHC1G126
CMOS IC
SINGLE BUS BUFFER GATE
WITH 3-STATE OUTPUT

DESCRIPTION
The U74AHC1G126 is a single bus buffer gate/line driver with
3-state output. When OE is low, the Y output are in a
high-impedance state. When OE is high, the device passes
noninverted data from the A input to the Y output.
To ensure the high-impedance state during power up or power
down, OE should be tied to GND through a pull-down resistor; the
minimum value of the resistor is determined by the current-sinking
capability of the driver.

FEATURES
* Wide supply voltage range from 2V to 5.5V
* Max tpd of 6 ns from A to Y at 5V
* Low power consumption, ICC = 1 μA (Max.) at 5.5V
* ±8 mA output driver at 5V

ORDERING INFORMATION
Order Number
U74AHC1G126G-AE5-R
U74AHC1G126G-AL5-R

Package
SOT-23-5
SOT-353
Packing
Tape Reel
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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
CMOS IC
PIN CONFIGURATION
VCC
5
1
OE

2
A
3
GND
FUNCTION TABLE
INPUT
OE
H
H
L

Y
4
A
H
L
X
OUTPUT
Y
H
L
Z
LOGIC DIAGRAM (positive logic)
OE
A
1
2
4
Y
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
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage Range
VCC
-0.5~7
V
Input Voltage Range
VIN
-0.5~7
V
Output Voltage Range
VOUT
-0.5~VCC +0.5
V
Input Clamp Current (VIN<0)
IIK
-20
mA
Output Clamp Current (VOUT<0, or VOUT>VCC)
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
SYMBOL
VCC
High-Level Input Voltage
VIH
Low-Level Input Voltage
VIL
Input Voltage
Output Voltage
VCC = 2V
VCC = 3V
VCC = 5.5V
VCC = 2V
VCC = 3V
VCC = 5.5V
VIN
VOUT
High-level Output Current
IOH
Low-level Output Current
IOL
Input Transition Rise or Fall Rate
Operating Temperature

CONDITIONS
t/v
MIN
2
1.5
2.1
3.85
0
0
VCC = 2V
VCC = 3.3±0.3V
VCC = 5±0.5V
VCC = 2V
VCC = 3.3±0.3V
VCC = 5±0.5V
VCC = 3.3±0.3V
VCC = 5±0.5V
TA
-40
TYP
MAX
5.5
0.5
0.9
1.65
5.5
VCC
-50
-4
-8
50
4
8
100
20
85
UNIT
V
V
V
V
V
V
V
V
V
μA
mA
mA
μA
mA
mA
ns/V
ns/V
°C
THERMAL DATA
PARAMETER
Junction to Ambient
SYMBOL
SOT-23-5
SOT-353
UNISONIC TECHNOLOGIES CO., LTD
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θJA
RATING
280
350
UNIT
°C/W
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ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
High-Level Output Voltage
Low-Level Output Voltage
Input Leakage Current
(A or OE input)
High-impedance state Current
Quiescent Supply Current
Input Capacitance
Output Capacitance

Propagation delay from input A to
output Y, tpd
Propagation delay from input OE to
output Y, ten
Propagation delay from input OE to
output Y, tdis
VOH
VOL
TEST CONDITIONS
IOH = -50 μA, VCC = 2V
IOH = -50 μA, VCC = 3V
IOH = -50 μA, VCC = 4.5V
IOH = -4 mA, VCC = 3V
IOH = -8 mA, VCC = 4.5V
IOH = 50 μA, VCC = 2V
IOH = 50 μA, VCC = 3V
IOH = 50 μA, VCC = 4.5V
IOH = 4 mA, VCC = 3V
IOH = 8 mA, VCC = 4.5V
MIN
1.9
2.9
4.4
2.58
3.94
TYP
2
3
4.5
MAX UNIT
V
0.1
0.1
0.1
0.36
0.36
V
II(LEAK)
VIN = 5.5V or GND, VCC = 0 to 5.5V
±0.1
μA
IOZ
ICC
CIN
COUT
VIN = VCC or GND, VCC = 5.5V
VIN = VCC or GND, IOUT = 0, VCC = 5.5V
VIN = VCC or GND, VCC=5V
VO = VCC or GND, VCC=5V
±0.25
1
10
μA
μA
pF
pF
4
10
SYMBOL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
TEST CONDITIONS
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
MIN
TYP
5.6
8.1
5.6
8.1
5.4
7.9
5.4
7.9
7
9.5
7
9.5
MAX UNIT
8
ns
11.5
8
ns
11.5
8
ns
11.5
8
ns
11.5
9.7
ns
13.2
9.7
ns
13.2
MIN
TYP
3.8
5.3
3.8
5.3
3.6
5.1
3.6
5.1
4.6
6.1
4.6
6.1
MAX UNIT
5.5
ns
7.5
5.5
ns
7.5
5.1
ns
7.1
5.1
ns
7.1
6.8
ns
8.8
6.8
ns
8.8
SWITCHING CHARACTERISTICS (VCC = 5V ± 0.5V, TA =25°C)
PARAMETER
Propagation delay from input A to
output Y, tpd
Propagation delay from input OE to
output Y, ten
Propagation delay from input OE to
output Y, tdis

SYMBOL
SWITCHING CHARACTERISTICS (VCC = 3.3V ± 0.3V, TA =25°C)
PARAMETER

CMOS IC
SYMBOL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
TEST CONDITIONS
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
OPERATING CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
Power dissipation capacitance
SYMBOL
Cpd
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TEST CONDITIONS
VCC = 5V, f=1MHz, No load
TYP
14
UNIT
pF
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CMOS IC
TEST CIRCUIT AND WAVEFORMS
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
VCC
Input
S1
Open
VLOAD
GND
VM
VLOAD
≤3ns
VCC/2
VCC
≤3ns
VCC/2
VCC
VIN
tr, tf
3.3V±0.3V
VCC
5V±0.5V
VCC
CL
15pF
50pF
15pF
50pF
RL
V∆
1kΩ
0.3V
1kΩ
0.5V
VIN
Input
VM
VM
tPLH
tPHL
0V
VOH
Output
VM
VOL
tPLH
tPHL
VOH
VM
Output
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VM
VOL
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
CMOS IC
TEST CIRCUIT AND WAVEFORMS(Cont.)
VIN
Input
VM
VM
0V
tPZL
tPLZ
VLOAD
Output
VM
S 1 at VLOAD
VOL ~ VΔ
tPZH
Output
VOL
tPHZ
VOH ~ VΔ
VOH
VM
S 1 at GND
0V
NoteS: 1. CL includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics: PRR ≤1MHz, ZO = 50Ω.
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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