74AHC126; 74AHCT126
Quad buffer/line driver; 3-state
Rev. 04 — 12 August 2009
Product data sheet
1. General description
The 74AHC126; 74AHCT126 is a high-speed Si-gate CMOS device and is pin compatible
with Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard
No. 7-A.
The 74AHC126; 74AHCT126 provides four non-inverting buffer/line drivers with 3-state
outputs. The 3-state outputs (nY) are controlled by the output enable input (nOE).
A LOW-level at pin nOE causes the outputs to assume a high-impedance OFF-state.
The 74AHC126; 74AHCT126 is identical to the 74AHC125; 74AHCT125 but has active
HIGH output enable inputs.
2. Features
I
I
I
I
Balanced propagation delays
All inputs have Schmitt-trigger action
Inputs accept voltages higher than V
CC
Input levels:
N
For 74AHC126: CMOS level
N
For 74AHCT126: TTL level
I
ESD protection:
N
HBM JESD22-A114E exceeds 2000 V
N
MM JESD22-A115-A exceeds 200 V
N
CDM JESD22-C101C exceeds 1000 V
I
Multiple package options
I
Specified from
−40 °C
to +85
°C
and from
−40 °C
to +125
°C
Nexperia
74AHC126; 74AHCT126
Quad buffer/line driver; 3-state
3. Ordering information
Table 1.
Ordering information
Package
Temperature range
74AHC126D
74AHCT126D
74AHC126PW
74AHCT126PW
74AHC126BQ
74AHCT126BQ
−40 °C
to +125
°C
−40 °C
to +125
°C
TSSOP14
−40 °C
to +125
°C
Name
SO14
Description
plastic small outline package; 14 leads;
body width 3.9 mm
plastic thin shrink small outline package; 14 leads;
body width 4.4 mm
Version
SOT108-1
SOT402-1
SOT762-1
Type number
DHVQFN14 plastic dual in-line compatible thermal enhanced very
thin quad flat package; no leads; 14 terminals;
body 2.5
×
3
×
0.85 mm
4. Functional diagram
2
1
5
4
9
10
12
13
1A
1OE
2A
2OE
3A
3OE
4A
4OE
1Y
3
2Y
6
3Y
8
4Y
11
mna235
Fig 1.
Functional diagram
2
1
5
EN1
1
3
6
4
9
8
10
nA
nY
12
11
13
nOE
mna234
mna236
Fig 2.
Logic symbol
Fig 3.
IEC logic symbol
74AHC_AHCT126_4
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 04 — 12 August 2009
2 of 15
Nexperia
74AHC126; 74AHCT126
Quad buffer/line driver; 3-state
5. Pinning information
5.1 Pinning
74AHC126
74AHCT126
1OE
1A
1Y
2OE
2A
2Y
GND
1
2
3
4
5
6
7
001aac982
74AHC126
74AHCT126
1OE
2
3
4
5
6
7
GND
3Y
8
GND
(1)
1
13 4OE
12 4A
11 4Y
10 3OE
9
8
3A
3Y
14 V
CC
terminal 1
index area
1A
1Y
2OE
2A
2Y
14 V
CC
13 4OE
12 4A
11 4Y
10 3OE
9
3A
001aak180
Transparent top view
(1) The die substrate is attached to this pad using
conductive die attach material. It can not be used as
a supply pin or input.
Fig 4. Pin configuration SO14 and TSSOP14
Fig 5. Pin configuration DHVQFN14
5.2 Pin description
Table 2.
Symbol
1OE
1A
1Y
2OE
2A
2Y
GND
3Y
3A
3OE
4Y
4A
4OE
V
CC
Pin description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Description
output enable input 1 (active HIGH)
data input 1
data output 1
output enable input 2 (active HIGH)
data input 2
data output 2
ground (0 V)
data output 3
data input 3
output enable input 3 (active HIGH)
data output 4
data input 4
output enable input 4 (active HIGH)
supply voltage
74AHC_AHCT126_4
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 04 — 12 August 2009
3 of 15
Nexperia
74AHC126; 74AHCT126
Quad buffer/line driver; 3-state
6. Functional description
Table 3.
Control
nOE
H
H
L
[1]
H = HIGH voltage state;
L = LOW voltage state;
X = don’t care;
Z = high-impedance OFF-state.
Function table
[1]
Input
nA
L
H
X
Output
nY
L
H
Z
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
V
I
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
[1]
[2]
Parameter
supply voltage
input voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
Conditions
Min
−0.5
−0.5
Max
+7.0
+7.0
-
+20
+25
+75
-
+150
500
Unit
V
V
mA
mA
mA
mA
mA
°C
mW
V
I
<
−0.5
V
V
O
<
−0.5
V or V
O
> V
CC
+ 0.5 V
V
O
=
−0.5
V to (V
CC
+ 0.5 V)
[1]
[1]
−20
−20
−25
-
−75
−65
T
amb
=
−40 °C
to +125
°C
[2]
-
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
For SO14 packages: above 70
°C
the value of P
tot
derates linearly at 8 mW/K.
For TSSOP14 packages: above 60
°C
the value of P
tot
derates linearly at 5.5 mW/K.
For DHVQFN14 packages: above 60
°C
the value of P
tot
derates linearly at 4.5 mW/K.
74AHC_AHCT126_4
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 04 — 12 August 2009
4 of 15
Nexperia
74AHC126; 74AHCT126
Quad buffer/line driver; 3-state
8. Recommended operating conditions
Table 5.
Symbol
74AHC126
V
CC
V
I
V
O
T
amb
∆t/∆V
74AHCT126
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
= 4.5 V to 5.5 V
4.5
0
0
−40
-
5.0
-
-
+25
-
5.5
5.5
V
CC
+125
20
V
V
V
°C
ns/V
supply voltage
input voltage
output voltage
ambient temperature
input transition rise and fall rate
V
CC
= 3.0 V to 3.6 V
V
CC
= 4.5 V to 5.5 V
2.0
0
0
−40
-
-
5.0
-
-
+25
-
-
5.5
5.5
V
CC
+125
100
20
V
V
V
°C
ns/V
ns/V
Operating conditions
Parameter
Conditions
Min
Typ
Max
Unit
9. Static characteristics
Table 6.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
74AHC126
V
IH
HIGH-level
input voltage
V
CC
= 2.0 V
V
CC
= 3.0 V
V
CC
= 5.5 V
V
IL
LOW-level
input voltage
V
CC
= 2.0 V
V
CC
= 3.0 V
V
CC
= 5.5 V
V
OH
HIGH-level
V
I
= V
IH
or V
IL
output voltage
I
O
=
−50 µA;
V
CC
= 2.0 V
I
O
=
−50 µA;
V
CC
= 3.0 V
I
O
=
−50 µA;
V
CC
= 4.5 V
I
O
=
−4.0
mA; V
CC
= 3.0 V
I
O
=
−8.0
mA; V
CC
= 4.5 V
V
OL
LOW-level
V
I
= V
IH
or V
IL
output voltage
I
O
= 50
µA;
V
CC
= 2.0 V
I
O
= 50
µA;
V
CC
= 3.0 V
I
O
= 50
µA;
V
CC
= 4.5 V
I
O
= 4.0 mA; V
CC
= 3.0 V
I
O
= 8.0 mA; V
CC
= 4.5 V
74AHC_AHCT126_4
Conditions
Min
1.5
2.1
3.85
-
-
-
1.9
2.9
4.4
2.58
3.94
-
-
-
-
-
25
°C
Typ
-
-
-
-
-
-
2.0
3.0
4.5
-
-
0
0
0
-
-
Max
-
-
-
0.5
0.9
1.65
-
-
-
-
-
0.1
0.1
0.1
0.36
0.36
−40 °C
to +85
°C −40 °C
to +125
°C
Unit
Min
1.5
2.1
3.85
-
-
-
1.9
2.9
4.4
2.48
3.80
-
-
-
-
-
Max
-
-
-
0.5
0.9
1.65
-
-
-
-
-
0.1
0.1
0.1
0.44
0.44
Min
1.5
2.1
3.85
-
-
-
1.9
2.9
4.4
2.40
3.70
-
-
-
-
-
©
Max
-
-
-
0.5
0.9
1.65
-
-
-
-
-
0.1
0.1
0.1
0.55
0.55
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 04 — 12 August 2009
5 of 15
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