UNISONIC TECHNOLOGIES CO., LTD
U74HCT125
QUADRUPLE BUS BUFFER
GATES WITH 3-STATE OUTPUTS
DESCRIPTION
The
U74HCT125
is a quadruple bus buffer gates with 3-state
output. When
OE
is high, the Y outputs are 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 V
CC
through a pull-up resistor; the
minimum value of the resistor is determined by the current-sinking
capability of the driver.
CMOS IC
FEATURES
* TTL-Voltage Compatible
* Max t
PD
of 12 ns from A to Y at 5.5 V, C
L
= 50 pF
* Low power consumption, I
CC
= 8μA (Max) at 5.5V
* ±6mA output driver at 5V
ORDERING INFORMATION
Ordering Number
Lead Free
U74HCT125L-S14-T
U74HCT125L-S14-R
U74HCT125L-P14-T
U74HCT125L-P14-R
Halogen Free
U74HCT125G-S14-T
U74HCT125G-S14-R
U74HCT125G-P14-T
U74HCT125G-P14-R
Package
SOP-14
SOP-14
TSSOP-14
TSSOP-14
Packing
Tube
Tape Reel
Tube
Tape Reel
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Copyright © 2012 Unisonic Technologies Co., Ltd
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QW-R502-700.B
U74HCT125
PIN CONFIGURATION
CMOS IC
FUNCTION TABLE
(each buffer)
INPUTS
OE
OUTPUTS
A
H
L
X
Y
H
L
Z
L
L
H
LOGIC DIAGRAM
(each buffer)
OE
A
Y
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U74HCT125
ABSOLUTE MAXIMUM RATING
(unless otherwise specified)
PARAMETER
CMOS IC
SYMBOL
RATINGS
UNIT
Supply Voltage
V
CC
-0.5~7
V
Input Voltage
V
IN
-0.5~7
V
Output Voltage
V
OUT
-0.5~V
CC
+0.5
V
Input Clamp Current (V
IN
<0, or V
IN
>0)
I
IK
±20
mA
Output Clamp Current (V
OUT
<0, or V
OUT
>V
CC
)
I
OK
±20
mA
Output Current
I
OUT
±35
mA
V
CC
or GND Current
I
CC
±70
mA
Storage Temperature
T
STG
-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 (V
CC
=4.5V to 5.5V)
Low-Level Input Voltage (V
CC
= 4.5V to 5.5V)
Input Voltage
Output Voltage
Input Transition Rise or Fall Rate
Operating Temperature
SYMBOL
V
CC
V
IH
V
IL
V
IN
V
OUT
Δt/Δv
T
A
MIN
4.5
2
0
0
-40
25
TYP
5
MAX
5.5
0.8
V
CC
V
CC
500
85
UNIT
V
V
V
V
V
ns/V
°C
ELECTRICAL CHARACTERISTICS
(T
A
=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
Additional Quiescent Supply Current
Input Capacitance
SYMBOL
V
OH
V
OL
I
I(LEAK)
I
OZ
I
CC
ΔI
CC
C
IN
TEST CONDITIONS
I
OH
= -20μA, V
CC
=4.5 V
I
OH
= -6 mA, V
CC
=4.5 V
I
OL
= 20
μA,
V
CC
=4.5 V
I
OL
= 6 mA , V
CC
=4.5 V
V
IN
= 5.5V or GND, V
CC
=5.5 V
V
OUT
= V
CC
or GND, V
CC
=5.5 V
V
IN
= V
CC
or GND, I
OUT
= 0, V
CC
=5.5 V
One input at 0.5V or 2.4V, V
CC
=5.5 V,
other inputs at V
CC
or GND
V
CC
=4.5V to 5.5 V
MIN
4.4
3.98
TYP
4.5
4.3
0.001
0.17
±0.1
±0.01
1.4
3
MAX UNIT
V
0.1
0.26
±100
±0.5
8
2.4
10
V
μA
μA
μA
mA
pF
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U74HCT125
SWITCHING CHARACTERISTICS
(C
L
= 50 pF, T
A
=25°C)
PARAMETER
SYMBOL
TEST CONDITIONS
V
CC
=4.5 V
Propagation Delay from Input A to
t
PLH
/ t
PHL
Output Y, t
PD
V
CC
=5.5 V
V
CC
=4.5 V
Propagation Delay from Input
OE
t
PZH
/ t
PZL
V
CC
=5.5 V
to Output Y, t
EN
V
CC
=4.5 V
Propagation delay from input OE to
t
PHZ
/ t
PLZ
output Y, t
DIS
V
CC
=5.5 V
V
CC
=4.5 V
Output transition (rise and fall) time,
t
TLH
/ t
THL
t
T
V
CC
=5.5 V
(C
L
= 150 pF, T
A
=25°C)
PARAMETER
SYMBOL
TEST CONDITIONS
V
CC
=4.5 V
Propagation Delay from Input A to
t
PLH
/ t
PHL
Output Y, t
PD
V
CC
=5.5 V
V
CC
=4.5 V
Propagation Delay from Input
OE
t
PZH
/ t
PZL
V
CC
=5.5 V
to Output Y, t
EN
V
CC
=4.5 V
Output transition (rise and fall) time,
t
TLH
/ t
THL
t
T
V
CC
=5.5 V
MIN
CMOS IC
TYP
15
12
18
15
15
13
8
7
TYP
19
16
25
21
17
14
MAX
26
23
28
25
26
23
15
14
MAX
36
32
40
35
42
38
UNIT
ns
ns
ns
ns
UNIT
ns
ns
ns
MIN
OPERATING CHARACTERISTICS
(T
A
=25°C)
PARAMETER
Power dissipation capacitance
SYMBOL
C
PD
TEST CONDITIONS
TYP
35
UNIT
pF
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QW-R502-700.B
U74HCT125
TEST CIRCUIT AND WAVEFORMS
CMOS IC
TEST
t
PLH
/t
PHL
t
PLZ
/t
PZL
t
PHZ
/t
PZH
S1
Open
V
LOAD
GND
V
CC
5V±0.5V
Input
V
IN
V
CC
t
R
, t
F
≤3ns
V
M
V
CC
/2
V
LOAD
V
CC
C
L
50pF
150pF
R
L
1kΩ
V
Δ
0.5V
V
IN
Input
V
M
V
M
0V
t
PLH
t
PHL
V
OH
Output
V
M
t
R
t
PHL
t
PLH
V
OH
V
M
V
M
V
OL
V
M
t
F
V
OL
Output
t
F
t
R
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