74HC126
QUADRUPLE 3-STATE BUFFERS OE HIGH
Description
The 74HC126 provides provides four independent buffer gates with
3-state outputs. Each buffer has a separate enable pin that if driven
with a low logic level places the corresponding output in the high
impedance state. The device is designed for operation with a power
supply range of 2.0V to 6.0V.
Pin Assignments
Features
•
•
•
•
•
Wide Supply Voltage Range from 2.0V to 6.0V
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)
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.
74HC126
Document number: DS35327 Rev. 3 - 2
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January 2013
© Diodes Incorporated
74HC126
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
Vcc
Function
Data Enable Input (active low)
Data Input
Data Output
Data Enable Input (active low)
Data Input
Data Output
Ground
Data Output
Data Input
Data Enable Input (active low)
Data Outp
Data Input
Data Enable Input (active low)
Supply Voltage
Logic Diagram
Function Table
Inputs
OE
H
H
L
A
H
L
X
Output
Y
H
L
Z
74HC126
Document number: DS35327 Rev. 3 - 2
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January 2013
© Diodes Incorporated
74HC126
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 V
CC
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
Conditions
Min
2.0
0
0
Max
6.0
V
CC
V
CC
625
140
85
Unit
V
V
V
ns/V
°C
V
CC
= 2.0V
Input Transition Rise or Fall Rate
Operating Free-Air Temperature
V
CC
= 4.5V
V
CC
= 6.0V
-40
6. Unused inputs should be held at V
CC
or ground.
+125
74HC126
Document number: DS35327 Rev. 3 - 2
3 of 9
www.diodes.com
January 2013
© Diodes Incorporated
74HC126
Electrical Characteristics
(@T
A
= +25°C, unless otherwise specified.)
Symbol
Parameter
Test Conditions
V
CC
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
I
OH
= -20μA
I
OH
= -20μA
V
OH
High-level Output Voltage
I
OH
= -20μA
I
OH
= -4.0mA
I
OH
= -5.2mA
I
OL
= 20μA
I
OL
= 20μA
V
OL
Low-level Output Voltage
I
OL
= 20μA
I
OL
= 4mA
I
OL
= 5.2mA
I
OZ
I
I
I
CC
Z State Leakage Current
Input Current
Supply Current
V
O
= 0 to 6.0V
V
I
= GND or 6.0V
V
I
= GND to 5.5V
V
I
= GND or V
CC
, I
O
=0
2.0V
4.5V
6.0V
4.5V
6.0V
2.0V
4.5V
6.0V
4.5V
6.0V
6.0V
6.0V
6.0V
T
A
= -40°C to +85°C
Min
Max
1.5
3.15
4.2
0.5
1.35
1.8
1.9
4.4
5.9
3.84
5.34
0.1
0.1
0.1
0.33
0.33
± 5.0
±1
20
T
A
= -40°C to +125°C
Min
Max
1.5
3.15
4.2
0.5
1.35
1.8
1.9
4.4
5.9
3.7
5.2
0.1
0.1
0.1
0.44
0.44
± 10
±1
40
μA
μA
μA
V
V
Unit
V
IH
High-level Input Voltage
V
V
IL
Low-level input voltage
V
Switching Characteristics
Symbol
Parameter
Propagation
Delay A
N
to Y
N
Enable Time
OE
N
to Y
N
Disable Time
OE
N
to Y
N
Transition Time
Test
Conditions
Figure 1
C
L
= 50pF
Figure 1
C
L
= 50pF
Figure 1
C
L
= 50pF
Figure 1
C
L
= 50pF
V
CC
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
T
A
= +25°C
Min
—
—
—
—
—
—
—
—
—
—
—
—
Typ
30
11
9
41
15
12
41
15
12
14
5
4
Max
100
20
17
125
25
21
125
25
21
60
12
10
-40°C to +85°C
Max
125
25
21
155
31
26
155
31
26
75
15
13
-40°C to +125°C
Max
150
30
26
190
38
32
190
38
32
90
18
15
Unit
t
PD
ns
t
EN
ns
t
DIS
ns
t
t
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
= 6V
Typ
22
4
Unit
pF
pF
74HC126
Document number: DS35327 Rev. 3 - 2
4 of 9
www.diodes.com
January 2013
© Diodes Incorporated
74HC126
Parameter Measurement Information
TEST
t
PLZ
(see Notes D and E)
t
PZL
(see Notes D and F)
Condition
Vload
Vload
V
CC
2.0V to 6.0V
Inputs
V
I
V
CC
t
r
/t
f
≤3ns
V
M
V
CC
/2
V
LOAD
2 X V
CC
C
L
15,50 pF
R
L
2 KΩ
V∆
10% of V
CC
Voltage Waveform
Pulse Duration
Voltage Waveform
Propagation Delay Times
Figure 1 Load Circuit and Voltage Waveforms
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 3 state 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
∆
74HC126
Document number: DS35327 Rev. 3 - 2
5 of 9
www.diodes.com
January 2013
© Diodes Incorporated
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