74HC126; 74HCT126
Quad buffer/line driver; 3-state
Rev. 3 — 22 September 2014
Product data sheet
1. General description
The 74HC126; 74HCT126 is a quad buffer/line driver with 3-state outputs controlled by
the output enable inputs (nOE). A LOW on nOE causes the outputs to assume
a high-impedance OFF-state. Inputs include clamp diodes. This enables the use of
current limiting resistors to interface inputs to voltages in excess of V
CC
.
2. Features and benefits
Inverting outputs
Complies with JEDEC standard no. 7A
Input levels:
For 74HC126: CMOS level
For 74HCT126: TTL level
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from
40 C
to +85
C
and
40 C
to +125
C
3. Ordering information
Table 1.
Ordering information
Package
Temperature range
74HC126N
74HCT126N
74HC126D
74HCT126D
74HC126DB
74HCT126DB
74HC126PW
74HCT126PW
40 C
to +125
C
TSSOP14
40 C
to +125
C
SSOP14
40 C
to +125
C
SO14
plastic small outline package; 14 leads;
body width 3.9 mm
plastic shrink small outline package; 14 leads;
body width 5.3 mm
plastic thin shrink small outline package; 14 leads;
body width 4.4 mm
SOT108-1
SOT337-1
SOT402-1
40 C
to +125
C
Name
DIP14
Description
plastic dual in-line package; 14 leads (300 mil)
Version
SOT27-1
Type number
NXP Semiconductors
74HC126; 74HCT126
Quad buffer/line driver; 3-state
4. Functional diagram
Fig 1.
Logic symbol
Fig 2.
IEC logic symbol
Fig 3.
Logic diagram (one buffer/line driver)
5. Pinning information
5.1 Pinning
Fig 4.
Pin configuration for SOT27-1 and SOT108-1
Fig 5.
Pin configuration for SOT337-1 and SOT402-1
74HC_HCT126
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet
Rev. 3 — 22 September 2014
2 of 16
NXP Semiconductors
74HC126; 74HCT126
Quad buffer/line driver; 3-state
5.2 Pin description
Table 2.
Symbol
1OE, 2OE, 3OE, 4OE
1A, 2A, 3A, 4A
1Y, 2Y, 3Y, 4Y
GND
V
CC
Pin description
Pin
1, 4, 10, 13
2, 5, 9, 12
3, 6, 8, 11
7
14
Description
data enable input (active HIGH)
data input
data output
ground (0 V)
supply voltage
6. Functional description
Table 3.
Control
nOE
H
H
L
[1]
Function table
[1]
Input
nA
L
H
X
Output
nY
L
H
Z
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
7. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
V
CC
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
Parameter
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
T
amb
=
40 C
to +125
C
DIP14 package
SO14 and (T)SSOP14 packages
[1]
[2]
[3]
[2]
[3]
Conditions
V
I
<
0.5
V or V
I
> V
CC
+ 0.5 V
V
O
<
0.5
V or V
O
> V
CC
+ 0.5 V
0.5
V < V
O
< V
CC
+ 0.5 V
[1]
[1]
Min
0.5
-
-
-
-
70
65
-
-
Max
+7
20
20
35
70
-
+150
750
500
Unit
V
mA
mA
mA
mA
mA
C
mW
mW
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
For DIP14 package: P
tot
derates linearly with 12 mW/K above 70
C.
For SO14 package: P
tot
derates linearly with 8 mW/K above 70
C.
For (T)SSOP14 packages: P
tot
derates linearly with 5.5 mW/K above 60
C.
74HC_HCT126
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet
Rev. 3 — 22 September 2014
3 of 16
NXP Semiconductors
74HC126; 74HCT126
Quad buffer/line driver; 3-state
8. Recommended operating conditions
Table 5.
Recommended operating conditions
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
V
CC
V
I
V
O
T
amb
t/V
supply voltage
input voltage
output voltage
ambient temperature
input transition rise and fall rate
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
Conditions
Min
2.0
0
0
40
-
-
-
74HC126
Typ
5.0
-
-
+25
-
1.67
-
Max
6.0
V
CC
V
CC
+125
625
139
83
Min
4.5
0
0
40
-
-
-
74HCT126
Typ
5.0
-
-
+25
-
1.67
-
Max
5.5
V
CC
V
CC
+125
-
139
-
V
V
V
C
ns/V
ns/V
ns/V
Unit
9. Static characteristics
Table 6.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
T
amb
= 25
C
Min
74HC126
V
IH
HIGH-level
input voltage
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
IL
LOW-level
input voltage
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
OH
HIGH-level
output voltage
V
I
= V
IH
or V
IL
I
O
=
20 A;
V
CC
= 2.0 V
I
O
=
20 A;
V
CC
= 4.5 V
I
O
=
20 A;
V
CC
= 6.0 V
I
O
=
6.0
mA; V
CC
= 4.5 V
I
O
=
7.8
mA; V
CC
= 6.0 V
V
OL
LOW-level
output voltage
V
I
= V
IH
or V
IL
I
O
= 20
A;
V
CC
= 2.0 V
I
O
= 20
A;
V
CC
= 4.5 V
I
O
= 20
A;
V
CC
= 6.0 V
I
O
= 6.0 mA; V
CC
= 4.5 V
I
O
= 7.8 mA; V
CC
= 6.0 V
I
I
I
OZ
input leakage
current
OFF-state
output current
V
I
= V
CC
or GND; V
CC
= 6.0 V
V
I
= V
IH
or V
IL
; V
O
= V
CC
or
GND; other inputs at V
CC
or
GND; V
CC
= 6.0 V; I
O
= 0 A
-
-
-
-
-
-
-
0
0
0
0.15
0.16
-
0.5
0.1
0.1
0.1
0.26
0.26
0.1
-
-
-
-
-
-
-
5.0
0.1
0.1
0.1
0.33
0.33
1.0
-
-
-
-
-
-
-
10
0.1
0.1
0.1
0.4
0.4
1.0
-
V
V
V
V
V
A
A
1.9
4.4
5.9
3.98
5.48
2.0
4.5
6.0
4.32
5.81
-
-
-
-
-
1.9
4.4
5.9
3.84
5.34
-
-
-
-
-
1.9
4.4
5.9
3.7
5.2
-
-
-
-
-
V
V
V
V
V
1.5
3.15
4.2
-
-
-
1.2
2.4
3.2
0.8
2.1
2.8
-
-
-
0.5
1.35
1.8
1.5
3.15
4.2
-
-
-
-
-
-
0.5
1.35
1.8
1.5
3.15
4.2
-
-
-
-
-
-
0.5
1.35
1.8
V
V
V
V
V
V
Typ
Max
T
amb
=
40 C
to +85
C
Min
Max
T
amb
=
40 C
to +125
C
Min
Max
Unit
74HC_HCT126
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet
Rev. 3 — 22 September 2014
4 of 16
NXP Semiconductors
74HC126; 74HCT126
Quad buffer/line driver; 3-state
Table 6.
Static characteristics
…continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
T
amb
= 25
C
Min
I
CC
C
I
supply current
input
capacitance
HIGH-level
input voltage
LOW-level
input voltage
HIGH-level
output voltage
V
CC
= 4.5 V to 5.5 V
V
CC
= 4.5 V to 5.5 V
V
I
= V
IH
or V
IL
; V
CC
= 4.5 V
I
O
=
20 A
I
O
=
6.0
mA
V
OL
LOW-level
output voltage
V
I
= V
IH
or V
IL
; V
CC
= 4.5 V
I
O
= 20
A
I
O
= 6.0 mA
I
I
I
OZ
input leakage
current
OFF-state
output current
supply current
additional
supply current
V
I
= V
CC
or GND; V
CC
= 5.5 V
V
I
= V
IH
or V
IL
; V
O
= V
CC
or
GND; other inputs at V
CC
or
GND; V
CC
= 5.5 V; I
O
= 0 A
V
I
= V
CC
or GND; I
O
= 0 A;
V
CC
= 5.5 V
per input pin; I
O
= 0 A;
V
I
= V
CC
2.1 V;
other inputs at V
CC
or GND;
V
CC
= 4.5 V to 5.5 V;
nA, nOE inputs
-
-
-
-
0
0.16
-
-
0.1
0.26
0.1
0.5
-
-
-
-
0.1
0.33
1.0
5.0
-
-
-
-
0.1
0.4
1.0
10
V
V
A
A
4.4
3.98
4.5
4.32
-
-
4.4
3.84
-
-
4.4
3.7
-
-
V
V
V
I
= V
CC
or GND; I
O
= 0 A;
V
CC
= 6.0 V
-
-
Typ
-
3.5
Max
8.0
-
T
amb
=
40 C
to +85
C
Min
-
-
Max
80
-
T
amb
=
40 C
to +125
C
Min
-
-
Max
160
-
A
pF
Unit
74HCT126
V
IH
V
IL
V
OH
2.0
-
1.6
1.2
-
0.8
2.0
-
-
0.8
2.0
-
-
0.8
V
V
I
CC
I
CC
-
-
-
100
8.0
360
-
-
80
450
-
-
160
490
A
A
C
I
input
capacitance
-
3.5
-
-
-
-
-
pF
10. Dynamic characteristics
Table 7.
Dynamic characteristics
GND = 0 V; C
L
= 50 pF; for test circuit, see
Figure 8.
Symbol Parameter
74HC126
t
pd
propagation delay nA to nY; see
Figure 6
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 5.0 V; C
L
= 15 pF
V
CC
= 6.0 V
74HC_HCT126
Conditions
T
amb
= 25
C
Min
[1]
T
amb
=
40 C
to +125
C
Max (85
C)
Max (125
C)
Unit
Typ
Max
-
-
-
-
30
11
9
9
100
20
-
17
125
25
-
21
150
30
-
26
ns
ns
ns
ns
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet
Rev. 3 — 22 September 2014
5 of 16
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