74AHC126; 74AHCT126
Quad buffer/line driver; 3-state
Rev. 5 — 28 April 2020
Product data sheet
1. General description
The 74AHC126; 74AHCT126 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 are overvoltage tolerant. This feature allows the use of these devices as
translators in mixed voltage environments.
2. Features
•
•
•
•
Balanced propagation delays
All inputs have Schmitt-trigger action
Inputs accept voltages higher than V
CC
Input levels:
•
For 74AHC126: CMOS level
•
For 74AHCT126: TTL level
ESD protection:
•
HBM JESD22-A114E exceeds 2000 V
•
MM JESD22-A115-A exceeds 200 V
•
CDM JESD22-C101C exceeds 1000 V
Multiple package options
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
•
•
•
3. Ordering information
Table 1. Ordering information
Type number
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
DHVQFN14 plastic dual in-line compatible thermal
enhanced very thin quad flat package; no leads;
14 terminals; body 2.5 × 3 × 0.85 mm
Nexperia
74AHC126; 74AHCT126
Quad buffer/line driver; 3-state
4. Functional diagram
2
1
5
4
9
10
12
13
1A
1OE
2A
2OE
3A
3OE
4A
4OE
mna235
1Y
3
2Y
6
3Y
8
4Y
11
Fig. 1.
Functional diagram
2
1
5
4
9
10
nA
nY
1
EN1
3
6
8
12
13
11
mna236
nOE
mna234
Fig. 2.
Logic symbol
Fig. 3.
IEC logic symbol
74AHC_AHCT126
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2020. All rights reserved
Product data sheet
Rev. 5 — 28 April 2020
2 / 15
Nexperia
74AHC126; 74AHCT126
Quad buffer/line driver; 3-state
5. Pinning information
5.1. Pinning
74AHC126
74AHCT126
1OE
2
3
4
5
6
7
GND
3Y
8
GND
(1)
1
74AHC126
74AHCT126
1OE
1A
1Y
2OE
2A
2Y
GND
1
2
3
4
5
6
7
001aac982
terminal 1
index area
1A
14 V
CC
13 4OE
12 4A
11 4Y
10 3OE
9
3A
14 V
CC
13 4OE
12 4A
11 4Y
10 3OE
9
8
3A
3Y
1Y
2OE
2A
2Y
001aak180
Transparent top view
Fig. 4.
Pin configuration SOT108-1 (SO14) and
SOT402-1 (TSSOP14)
(1) This is not a ground pin. There is no electrical or
mechanical requirement to solder the pad. In case
soldered, the solder land should remain floating or
connected to GND.
Fig. 5.
Pin configuration SOT762-1 (DHVQFN14)
5.2. Pin description
Table 2. Pin description
Symbol
1OE
1A
1Y
2OE
2A
2Y
GND
3Y
3A
3OE
4Y
4A
4OE
V
CC
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
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2020. All rights reserved
Product data sheet
Rev. 5 — 28 April 2020
3 / 15
Nexperia
74AHC126; 74AHCT126
Quad buffer/line driver; 3-state
6. Functional description
Table 3. Function table
H = HIGH voltage state; L = LOW voltage state; X = don’t care; Z = high-impedance OFF-state.
Control
nOE
H
H
L
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 SOT108-1 (SO14) package: P
tot
derates linearly with 10.1 mW/K above 100 °C.
For SOT402-1 (TSSOP14) package: P
tot
derates linearly with 7.3 mW/K above 81 °C.
For SOT762-1 (DHVQFN14) package: P
tot
derates linearly with 9.6 mW/K above 98 °C.
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
Δt/ΔV
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
Conditions
Min
2.0
0
0
-40
-
-
74AHC126
Typ
5.0
-
-
+25
-
-
Max
5.5
5.5
V
CC
+125
100
20
Min
4.5
0
0
-40
-
-
74AHCT126
Typ
5.0
-
-
+25
-
-
Max
5.5
5.5
V
CC
+125
-
20
V
V
V
°C
ns/V
ns/V
Unit
74AHC_AHCT126
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2020. All rights reserved
Product data sheet
Rev. 5 — 28 April 2020
4 / 15
Nexperia
74AHC126; 74AHCT126
Quad buffer/line driver; 3-state
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
V
I
= V
IH
or V
IL
HIGH-level
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
V
I
= V
IH
or V
IL
LOW-level
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
I
I
I
OZ
input leakage
current
V
I
= 5.5 V or GND;
V
CC
= 0 V to 5.5 V
1.5
2.1
3.85
-
-
-
1.9
2.9
4.4
2.58
3.94
-
-
-
-
-
-
-
-
-
-
-
-
-
2.0
3.0
4.5
-
-
0
0
0
-
-
-
-
-
-
-
0.5
0.9
1.65
-
-
-
-
-
0.1
0.1
0.1
0.36
0.36
0.1
±0.25
1.5
2.1
3.85
-
-
-
1.9
2.9
4.4
2.48
3.80
-
-
-
-
-
-
-
-
-
-
0.5
0.9
1.65
-
-
-
-
-
0.1
0.1
0.1
0.44
0.44
1.0
±2.5
1.5
2.1
3.85
-
-
-
1.9
2.9
4.4
2.40
3.70
-
-
-
-
-
-
-
-
-
-
0.5
0.9
1.65
-
-
-
-
-
0.1
0.1
0.1
0.55
0.55
2.0
±10.0
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
μA
μA
Conditions
Min
25 °C
Typ
Max
-40 °C to +85 °C
Min
Max
-40 °C to +125 °C Unit
Min
Max
OFF-state
V
I
= V
IH
or V
IL
;
output current V
O
= V
CC
or GND;
V
CC
= 5.5 V
supply current V
I
= V
CC
or GND; I
O
= 0 A;
V
CC
= 5.5 V
input
capacitance
output
capacitance
V
I
= V
CC
or GND
I
CC
C
I
C
O
-
-
-
-
3
4
2.0
10
-
-
-
-
20
10
-
-
-
-
40
10
-
μA
pF
pF
74AHC_AHCT126
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2020. All rights reserved
Product data sheet
Rev. 5 — 28 April 2020
5 / 15
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