Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74AHCT125
CMOS IC
QUADRUPLE BUS BUFFER
GATES WITH 3-STATE
OUTPUTS

DESCRIPTION
The U74AHCT125 is a quadruple bus buffer gates with 3-state
output. When OE is high, the Y output is in a high-impedance
state. When OE is low, 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 VCC through a pull-up resistor; the
minimum value of the resistor is determined by the current-sinking
capability of the driver.

FEATURES
* TTL-Voltage Compatible
* Max tPD of 3.8ns from A to Y at 5V, CL=15pF
* Low Quiescent Current: ICC = 2 μA (Max) at 5.5V
* ±8 mA Output Driver at 5V

ORDERING INFORMATION
Ordering Number
U74AHCT125G-P14-R
U74AHCT125G-S14-R

Package
TSSOP-14
SOP-14
Packing
Tape Reel
Tape Reel
MARKING
SOP-14
14 13
12
11
10
9
8
UTC
AHCT125G
1
2
3
4
5
6
7
TSSOP-14
14 13 12 11 10 9
Date Code
Lot Code
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
8
UTC
AHCT125G
1
2 3
4
5
6
7
Date Code
Lot Code
1 of 6
QW-R502-670.C
U74AHCT125
CMOS IC

PIN CONFIGURATION

FUNCTION TABLE
INPUTS

OE
A
OUTPUTS
Y
L
L
H
H
L
X
H
L
Z
LOGIC DIAGRAM
OE
A
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
Y
2 of 6
QW-R502-670.C
U74AHCT125

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
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
Note: 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
High-Level Input Voltage
Low-Level Input Voltage
Input Voltage
Output Voltage
High-level Output Current
Low-level Output Current
Input Transition Rise or Fall Rate
Operating Temperature

SYMBOL
VCC
VIH
VIL
VIN
VOUT
IOH
IOL
t/v
TA
RATINGS
4.5 ~ 5.5
2
0.8
0 ~ 5.5
0 ~ VCC
-8
8
20
-40 ~ 85
UNIT
V
V
V
V
V
mA
mA
ns/V
°C
ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
SYMBOL
High-Level Output Voltage
VOH
Low-Level Output Voltage
VOL
TEST CONDITIONS
IOH = -50 μA, VCC = 4.5V
IOH = -8 mA, VCC = 4.5V
IOH = 50 μA, VCC = 4.5V
IOH = 8 mA, VCC = 4.5V
MIN TYP MAX UNIT
4.4
4.5
V
3.94
0.1
V
0.36
Input Leakage Current
(A or OE input)
II(LEAK)
VIN = 5.5V or GND, VCC = 0 to 5.5V
±0.1
μA
High-impedance state Current
Quiescent Supply Current
Additional quiescent supply current
Input Capacitance
Output Capacitance
IOZ
ICC
ΔICC
CIN
COUT
VOUT = VCC or GND, VCC = 5.5V
VIN = VCC or GND, IOUT = 0, VCC = 5.5V
±0.25
2
1.35
10
μA
μA
mA
pF
pF
One input at 3.4V,other inputs at VCC or GND
VIN = VCC or GND, VCC=5V
VOUT = VCC or GND, VCC=5V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4
15
3 of 6
QW-R502-670.C
U74AHCT125

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

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
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
OPERATING CHARACTERISTICS (TA =25°C)
PARAMETER
Power Dissipation Capacitance
SYMBOL
TEST CONDITIONS
CPD
VCC = 5V, f=1MHz, No load
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
RATINGS
14
UNIT
pF
4 of 6
QW-R502-670.C
U74AHCT125

CMOS IC
TEST CIRCUIT AND WAVEFORMS
VCC
5V±0.5V
Input
VIN
tR, tF
VCC
≤3ns
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
VLOAD
GND
VM
VLOAD
CL
RL
V∆
VCC/2
VCC
15pF
50pF
1kΩ
0.5V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 6
QW-R502-670.C
U74AHCT125

CMOS IC
TEST CIRCUIT AND WAVEFORMS(Cont.)
VIN
Input
VM
VM
tPLH
tPHL
0V
VOH
Output
VM
VM
VOL
tPLH
tPHL
VOH
VM
Output
VM
VOL
Voltage Waveforms Propagation Delay Times
Notes: 1. CL includes probe and jig capacitance.
Notes: 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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
6 of 6
QW-R502-670.C
Similar pages