Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74AHC126
CMOS IC
QUADRUPLE BUS BUFFER
GATES WITH 3-STATE
OUTPUTS

DESCRIPTION
SOP-14
The U74HC126 is a quadruple bus buffer gate with 3-state
outputs and 4 channels.

FEATURES
* Operate from 2V to 5.5V
* Max tpd of 5.5ns at 5 V(CL=15pF)
* Typical VIH< 2.1V at VCC=3V, Ta=25°C
* Typical VIL> 0.9V at VCC=3V, Ta=25°C

ORDERING INFORMATION
Ordering Number
U74AHC126G-S14-R

Package
SOP-14
Packing
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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U74AHC126


CMOS IC
PIN CONFIGURATION
1OE
1
14
VCC
1A
2
13
4OE
1Y
3
12
4A
2OE
4
11
4Y
2A
5
10
3OE
2Y
6
9
3A
GND
7
8
3Y
FUNCTION TABLE
INPUTS(OE)
H
H
L
Note: H: HIGH voltage level

INPUTS(A)
L
H
X
L: LOW voltage level
OUTPUT(Y)
L
H
Z
Z: high impedance
X: don’t care
LOGIC DIAGRAM
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U74AHC126

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
IOUT
±25
mA
Input Clamp Current
IIK
-20
mA
Output Clamp Current
IOK
±20
mA
Operating Temperature
TOPR
-40 ~ + 85
°C
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.

THERMAL DATA
PARAMETER
Junction to Ambient

SYMBOL
θJA
TYP
MAX
76
UNIT
°C/W
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
SYMBOL
VCC
High-Level Input Voltage
VIH
Low-Level Input Voltage
VIL
Input Voltage
Output Voltage
IOH
Low-Level Input Current
IOL
Input Transition Rise or Fall rate
TEST CONDITIONS
VCC=2V
VCC=3V
VCC=5.5V
VCC=2V
VCC=3V
VCC=5.5V
VIN
VOUT
High-Level Input Current

MIN
tR, tF
MIN
2
1.5
2.1
3.85
TYP
MAX
5.5
UNIT
V
V
0.5
0.9
1.65
5.5
VCC
-50
-4
-8
50
4
8
100
20
0
0
VCC=2V
VCC=3.3V±0.3V
VCC=5V±0.5V
VCC=2V
VCC=3.3V±0.3V
VCC=5V±0.5V
VCC=3.3V±0.3V
VCC=5V±0.5V
V
V
V
μA
mA
mA
μA
mA
mA
ns/V
ELECTRICAL CHARACTERISTICS (TA=25°С)
PARAMETER
Output Voltage High-Level
SYMBOL
VOH
Output Voltage Low-Level
VOL
Input Leakage Current
Output Off-State Current
Quiescent Supply Current
Input Capacitance
II(LEAK)
IOZ
IQ
CI
TEST CONDITIONS
VCC=2V, IOH=-50μA
VCC=3V, IOH=-50μA
VCC=4.5V, IOH=-50μA
VCC=3V, IOH=-4mA
VCC=4.5V, IOH=-8mA
VCC=2V, IOL=50μA
VCC=3V, IOL=50μA
VCC=4.5V, IOL=50μA
VCC=3V, IOL=4mA
VCC=4.5V, IOL=8mA
VCC=0V~5.5V, VIN= VCC or GND
VCC=5.5V, VOUT= VCC or GND
VCC=5.5V, VIN=VCC or GND, IOUT=0
VCC=5V
UNISONIC TECHNOLOGIES CO., LTD
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MIN
1.9
2.9
4.4
2.58
3.94
TYP
2
3
4.5
4
MAX
UNIT
V
0.1
0.1
0.1
0.36
0.36
±100
±250
4
10
V
nA
nA
μA
pF
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CMOS IC
SWITCHING CHARACTERISTICS(TA=25°С,CL=15pF)
PARAMETER
SYMBOL
Propagation Delay From Input A to Output Y
tPLH/tPHL
Propagation Delay From Input OE to Output Y
tPZH/tPZL
Propagation Delay From Input OE to Output Y
tPHZ/tPLZ

MIN
1
1
1
1
1
1
TYP
MIN
1
1
1
1
1
1
TYP
MIN
TYP
14
MAX
9.5
6.5
9.5
6
11.5
8
UNIT
MAX
13
8.5
13
8
15
10
UNIT
MAX
UNIT
pF
ns
ns
ns
SWITCHING CHARACTERISTICS(TA=25°С,CL=50pF)
PARAMETER
SYMBOL
Propagation Delay From Input A to Output Y
tPLH/tPHL
Propagation Delay From Input OE to Output Y
tPZH/tPZL
Propagation Delay From Input OE to Output Y
tPHZ/tPLZ

TEST CONDITIONS
VCC=3.3V±0.3V
VCC=5V±0.5V
VCC=3.3V±0.3V
VCC=5V±0.5V
VCC=3.3V±0.3V
VCC=5V±0.5V
TEST CONDITIONS
VCC=3.3V±0.3V
VCC=5V±0.5V
VCC=3.3V±0.3V
VCC=5V±0.5V
VCC=3.3V±0.3V
VCC=5V±0.5V
ns
ns
ns
OPERATING CHARACTERISTICS(TA=25°С)
PARAMETER
Power Dissipation Capacitance
SYMBOL TEST CONDITIONS
Cpd
No Load, f=1MHz
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CMOS IC
TEST CIRCUIT AND WAVEFORMS
t PLH
t PZL
t PLZ
t PZH
t PHZ
t PHL
Note: CL includes probe and jig capacitance.
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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