74HCT125
QUADRUPLE 3-STATE BUFFERS OE LOW
Description
The 74HCT125 provides provides four independent buffer gates with
3-state outputs. Each buffer has a separate enable pin that if driven
with a high logic level places the corresponding output in the high
impedance state. The device is designed for operation with a power
supply range of 4.5V to 5.5V.
Pin Assignments
( Top View )
1OE
1A
1Y
2OE
2A
2Y
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Vcc
4OE
4A
4Y
3OE
3A
3Y
Features
•
•
•
•
•
•
•
Wide Supply Voltage Range from 4.5V to 5.5V
Pin Compatible with Low Power Schottky (LSTTL)
Inputs Are TTL Voltage Level Compatible
Sinks or Sources 4mA at V
CC
= 4.5V
CMOS Low Power Consumption
Schmitt Trigger Action at All Inputs
ESD Protection Exceeds JESD 22
200-V Machine Model (A115-A)
2000-V Human Body Model (A114-A)
Exceeds 1000-V Charged Device Model (C101C)
•
•
•
Range of Package Options SO-14 and TSSOP-14
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
SO-14 / TSSOP-14
Applications
•
•
General Purpose Logic
Wide array of products such as:
PCs, networking, notebooks, netbooks
Computer peripherals, hard drives, CD/DVD ROM
TV, DVD, DVR, set top box
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
74HCT125
Document number: DS35336 Rev. 3 - 2
1 of 8
www.diodes.com
January 2013
© Diodes Incorporated
74HCT125
Pin Descriptions
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Pin Name
1OE
1A
1Y
2OE
2A
2Y
GND
3Y
3A
3OE
4Y
4A
4OE
V
CC
Description
Data Enable Input
Data Input
Data Output
Data Enable Input
Data Input
Data Output
Ground
Data Output
Data Input
Data Enable Input
Data Outp
Data Input
Data Enable Input
Supply Voltage
(active low)
(active low)
(active low)
(active low)
Logic Diagram
Function Table
Inputs
Output
A
H
L
X
Y
H
L
Z
OE
L
L
H
74HCT125
Document number: DS35336 Rev. 3 - 2
2 of 8
www.diodes.com
January 2013
© Diodes Incorporated
74HCT125
Absolute Maximum Ratings
(Note 4) (@T
A
= +25°C, unless otherwise specified.)
Symbol
ESD HBM
ESD CDM
ESD MM
V
CC
V
I
I
IK
I
OK
I
O
I
CC
I
GND
T
J
T
STG
P
TOT
Notes:
Description
Human Body Model ESD Protection
Charged Device Model ESD Protection
Machine Model ESD Protection
Supply Voltage Range
Input Voltage Range (Note 5)
Input Clamp Current
Output Clamp Current
V
I
< -0.5V or Vi > V
CC
+0.5V
V
O
< -0.5V or V
O
> V
CC
+0.5V
Rating
2
1
200
-0.5 to +7.0
-0.5 to +7.0
±20
±20
+/-25
50
-50
-40 to +150
-65 to +150
500
Unit
KV
KV
V
V
V
mA
mA
mA
mA
mA
°C
°C
mW
Continuous Output Current -0.5V < V
O
V
CC
+0.5V
Continuous Current Through Vcc
Continuous Current Through GND
Operating Junction Temperature
Storage Temperature
Total Power Dissipation
4. Stresses beyond the absolute maximum may result in immediate failure or reduced reliability. These are stress values and device operation should
be within recommend values.
5. Input Voltage cannot exceed V
CC
to the extent the Maximum clamp current is exceeded.
Recommended Operating Conditions
(Note 6) (@T
A
= +25°C, unless otherwise specified.)
Symbol
V
CC
V
I
V
O
Δt/ΔV
T
A
Note:
Parameter
Supply Voltage
Input Voltage
Output Voltage
Input Transition Rise or Fall Rate
Operating Free-Air Temperature
Conditions
Min
4.5
0
0
Max
5.5
V
CC
V
CC
500
+125
Unit
V
V
V
ns/V
°C
V
CC
= 4.5V to 5.5V
-40
6. Unused inputs should be held at V
CC
or Ground.
Electrical Characteristics
(@T
A
= +25°C, unless otherwise specified.)
Symbol
V
IH
V
IL
V
OH
V
OL
I
OZ
I
I
I
CC
ΔI
CC
Parameter
High-Level Input Voltage
Low-Level Input Voltage
High-Level Output Voltage
Low-Level Output Voltage
Z State Leakage Current
Input Current
Supply Current
Additional Supply Current
I
OH
= -20μA
I
OH
= -4mA
I
OL
= 20μA
I
OL
= 4.0mA
V
O
= 0 to 5.5V
V
I
=GND to 6.0V
V
I
= GND or V
CC
, I
O
= 0
One Input at V
CC
–2.1V
Other Pins at V
CC
or GND
Test Conditions
V
CC
4.5V to 5.5V
4.5V to 5.5V
4.5V
4.5V
4.5V
4.5V
5.5V
6.0V
6.0V
4.5V to 5.5V
4.4
3.84
0.1
0.33
± 5.0
±1
20
675
T
A
= -40°C to +85°C
Min
Max
2.0
0.8
4.4
3.70
0.1
0.4
± 10
±1
40
735
T
A
= -40°C to +125°C
Min
Max
2.0
0.8
Unit
V
V
V
V
μA
μA
μA
μA
74HCT125
Document number: DS35336 Rev. 3 - 2
3 of 8
www.diodes.com
January 2013
© Diodes Incorporated
74HCT125
Switching Characteristics
Symbol
t
PD
t
EN
t
DIS
t
t
Parameter
Propagation
Delay A
N
to Y
N
Enable Time
OE
N
to Y
N
DisableTime
OE
N
to Y
N
Transition Time
Test Conditions
V
CC
T
A
= +25°C
Min
—
Figure 1
C
L
= 50pF
4.5V
—
—
—
Typ
15
15
15
5
Max
25
28
25
12
-40°C to +85°C
Max
31
35
31
15
-40°C to +125°C
Max
38
42
38
18
Unit
ns
ns
ns
ns
Operating Characteristics
(@T
A
= +25°C, unless otherwise specified.)
Parameter
C
pd
C
I
Power Dissipation
Capacitance per Gate
Input Capacitance
Test Conditions
f = 1 MHz
V
I
= V
CC
– or GND
V
CC
= 5.5V
Typ
24
3.5
Unit
pF
pF
Parameter Measurement Information
TEST
t
PLZ
(see Notes D and E)
t
PZL
(see Notes D and F)
Condition
Vload
Vload
V
CC
4.5V
Inputs
V
I
1.5V
t
r
/t
f
≤6ns
V
M
3.0V
V
LOAD
2 X V
CC
C
L
50pF
R
L
2KΩ
V∆
10% of V
CC
Voltage Waveform
Pulse Duration
Voltage Waveform
Propagation Delay Times
Notes:
A. Includes test lead and test apparatus capacitance.
B. All pulses are supplied at pulse repetition rate
≤
1 MHz
C. The inputs are measured one at a time with one transition per measurement.
D. For the open drain device t
PLZ
and t
PZL
are the same as t
PD
E. t
PZL
is measured at V
M
.
D. t
PLZ
is measured at V
OL
+V
∆
F. A Thevenin equivalent load may be used in place of V
CC
X 2 and resistor divider
Figure 1 Load Circuit and Voltage Waveforms
74HCT125
Document number: DS35336 Rev. 3 - 2
4 of 8
www.diodes.com
January 2013
© Diodes Incorporated
74HCT125
Ordering Information
Device
74HCT125S14-13
74HCT125T14-13
Package Code
S14
T14
Packaging
SO-14
TSSOP-14
7” Tape and Reel
Quantity
Part Number Suffix
2500/Tape & Reel
-13
2500/Tape & Reel
-13
Marking Information
(1) SO-14, TSSOP-14
Part Number
74HCT125S14
74HCT125T14
Package
SO-14
TSSOP-14
74HCT125
Document number: DS35336 Rev. 3 - 2
5 of 8
www.diodes.com
January 2013
© Diodes Incorporated
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