74LVC2G126
Dual bus buffer/line driver; 3-state
Rev. 08 — 5 May 2008
Product data sheet
1. General description
The 74LVC2G126 is a dual non-inverting buffer/line driver with 3-state outputs. Each
3-state output is controlled by an output enable input (pin nOE). A LOW-level at pin nOE
causes the output to assume a high-impedance OFF-state. Schmitt trigger action at all
inputs makes the circuit highly tolerant of slower input rise and fall times.
Inputs can be driven from either 3.3 V or 5 V devices. This feature allows the use of the
74LVC2G126 as a translator in a mixed 3.3 V and 5 V environment.
It is fully specified for partial power-down applications using I
OFF
. The I
OFF
circuitry
disables the output, preventing a damaging backflow current through the device when it is
powered down.
2. Features
I
I
I
I
Wide supply voltage range from 1.65 V to 5.5 V
5 V tolerant input/output for interfacing with 5 V logic
High noise immunity
Complies with JEDEC standard:
N
JESD8-7 (1.65 V to 1.95 V)
N
JESD8-5 (2.3 V to 2.7 V)
N
JESD8-B/JESD36 (2.7 V to 3.6 V)
ESD protection:
N
HBM JESD22-A114E exceeds 2000 V
N
MM JESD22-A115-A exceeds 200 V
±24
mA output drive (V
CC
= 3.0 V)
CMOS low power consumption
Latch-up performance exceeds 250 mA
Direct interface with TTL levels
Inputs accept voltages up to 5 V
Multiple package options
Specified from
−40 °C
to +85
°C
and
−40 °C
to +125
°C
I
I
I
I
I
I
I
I
NXP Semiconductors
74LVC2G126
Dual bus buffer/line driver; 3-state
3. Ordering information
Table 1.
Ordering information
Package
Temperature range Name
74LVC2G126DP
74LVC2G126DC
74LVC2G126GT
74LVC2G126GD
74LVC2G126GM
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
TSSOP8
VSSOP8
XSON8
XSON8U
XQFN8U
Description
plastic thin shrink small outline package; 8 leads;
body width 3 mm; lead length 0.5 mm
Version
SOT505-2
Type number
plastic very thin shrink small outline package; 8 leads; SOT765-1
body width 2.3 mm
plastic extremely thin small outline package; no leads; SOT833-1
8 terminals; body 1
×
1.95
×
0.5 mm
plastic extremely thin small outline package; no leads; SOT996-2
8 terminals; UTLP based; body 3
×
2
×
0.5 mm
plastic extremely thin quad flat package; no leads;
8 terminals; UTLP based; body 1.6
×
1.6
×
0.5 mm
SOT902-1
4. Marking
Table 2.
Marking codes
Marking code
V26
V26
V26
V26
V26
Type number
74LVC2G126DP
74LVC2G126DC
74LVC2G126GT
74LVC2G126GD
74LVC2G126GM
5. Functional diagram
1A
1OE
2A
2OE
1Y
2Y
nA
nY
nOE
001aah787
mna234
Fig 1.
Logic symbol
Fig 2.
Logic diagram (one gate)
74LVC2G126_8
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 08 — 5 May 2008
2 of 17
NXP Semiconductors
74LVC2G126
Dual bus buffer/line driver; 3-state
6. Pinning information
6.1 Pinning
74LVC2G126
1OE
1
8
V
CC
1A
2
7
2OE
74LVC2G126
1OE
1A
2Y
GND
1
2
3
4
001aab740
8
7
6
5
V
CC
2OE
1Y
2A
2Y
3
6
1Y
GND
4
5
2A
001aab741
Transparent top view
Fig 3.
Pin configuration SOT505-2 (TSSOP8) and
SOT765-1 (VSSOP8)
Fig 4.
Pin configuration SOT833-1 (XSON8)
74LVC2G126
terminal 1
index area
2OE
1
V
CC
8
7
1OE
1OE
1A
2Y
GND
1
2
8
7
V
CC
1Y
2OE
1Y
2A
2A
3
4
5
2Y
2
6
1A
74LVC2G126
3
4
6
5
GND
001aaf056
001aah949
Transparent top view
Transparent top view
Fig 5.
Pin configuration SOT996-2 (XSON8U)
Fig 6.
Pin configuration SOT902-1 (XQFN8U)
6.2 Pin description
Table 3.
Symbol
Pin description
Pin
SOT505-2, SOT765-1,
SOT833-1 and SOT996-2
1OE
1A
2Y
GND
2A
74LVC2G126_8
Description
SOT902-1
7
6
5
4
3
Rev. 08 — 5 May 2008
1
2
3
4
5
output enable input (active HIGH)
data input
data output
ground (0 V)
data input
© NXP B.V. 2008. All rights reserved.
Product data sheet
3 of 17
NXP Semiconductors
74LVC2G126
Dual bus buffer/line driver; 3-state
Table 3.
Symbol
Pin description
…continued
Pin
SOT505-2, SOT765-1,
SOT833-1 and SOT996-2
SOT902-1
2
1
8
data output
output enable input (active HIGH)
supply voltage
Description
1Y
2OE
V
CC
6
7
8
7. Functional description
Table 4.
Input
nOE
H
H
L
[1]
Function table
[1]
Output
nA
L
H
X
nY
L
H
Z
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
8. Limiting values
Table 5.
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
V
I
I
OK
V
O
I
O
I
CC
I
GND
P
tot
T
stg
[1]
[2]
[3]
Parameter
supply voltage
input clamping current
input voltage
output clamping current
output voltage
output current
supply current
ground current
total power dissipation
storage temperature
Conditions
V
I
< 0 V
[1]
Min
−0.5
−50
−0.5
-
[1]
[1][2]
Max
+6.5
-
+6.5
±50
V
CC
+ 0.5
+6.5
±50
+100
-
300
+150
Unit
V
mA
V
mA
V
V
mA
mA
mA
mW
°C
V
O
> V
CC
or V
O
< 0 V
Active mode
Power-down mode
V
O
= 0 V to V
CC
−0.5
−0.5
-
-
−100
T
amb
=
−40 °C
to +125
°C
[3]
-
−65
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
When V
CC
= 0 V (Power-down mode), the output voltage can be 5.5 V in normal operation.
For TSSOP8 packages: above 55
°C
the value of P
tot
derates linearly at 2.5 mW/K.
For VSSOP8 packages: above 110
°C
the value of P
tot
derates linearly at 8.0 mW/K.
For XSON8, XSON8U and XQFN8U packages: above 45
°C
the value of P
tot
derates linearly at 2.4 mW/K.
74LVC2G126_8
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 08 — 5 May 2008
4 of 17
NXP Semiconductors
74LVC2G126
Dual bus buffer/line driver; 3-state
9. Recommended operating conditions
Table 6.
Symbol
V
CC
V
I
V
O
T
amb
∆t/∆V
Operating conditions
Parameter
supply voltage
input voltage
output voltage
ambient temperature
input transition rise and fall rate
V
CC
= 1.65 V to 2.7 V
V
CC
= 2.7 V to 5.5 V
Active mode
V
CC
= 0 V; Power-down mode
Conditions
Min
1.65
0
0
0
−40
-
-
Max
5.5
5.5
V
CC
5.5
+125
20
10
Unit
V
V
V
V
°C
ns/V
ns/V
10. Static characteristics
Table 7.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
T
amb
=
−40 °C
to +85
°C
V
IH
HIGH-level input voltage
V
CC
= 1.65 V to 1.95 V
V
CC
= 2.3 V to 2.7 V
V
CC
= 2.7 V to 3.6 V
V
CC
= 4.5 V to 5.5 V
V
IL
LOW-level input voltage
V
CC
= 1.65 V to 1.95 V
V
CC
= 2.3 V to 2.7 V
V
CC
= 2.7 V to 3.6 V
V
CC
= 4.5 V to 5.5 V
V
OL
LOW-level output voltage
V
I
= V
IH
or V
IL
I
O
= 100
µA;
V
CC
= 1.65 V to 5.5 V
I
O
= 4 mA; V
CC
= 1.65 V
I
O
= 8 mA; V
CC
= 2.3 V
I
O
= 12 mA; V
CC
= 2.7 V
I
O
= 24 mA; V
CC
= 3.0 V
I
O
= 32 mA; V
CC
= 4.5 V
V
OH
HIGH-level output voltage V
I
= V
IH
or V
IL
I
O
=
−100 µA;
V
CC
= 1.65 V to 5.5 V
I
O
=
−4
mA; V
CC
= 1.65 V
I
O
=
−8
mA; V
CC
= 2.3 V
I
O
=
−12
mA; V
CC
= 2.7 V
I
O
=
−24
mA; V
CC
= 3.0 V
I
O
=
−32
mA; V
CC
= 4.5 V
I
I
I
OZ
input leakage current
OFF-state output current
V
I
= 5.5 V or GND; V
CC
= 0 V to 5.5 V
V
I
= V
IH
or V
IL
; V
O
= 5.5 V or GND;
V
CC
= 3.6 V
V
CC
−
0.1
1.2
1.9
2.2
2.3
3.8
-
-
-
-
-
-
-
-
±0.1
±0.1
-
-
-
-
-
-
±5
±10
V
V
V
V
V
V
µA
µA
-
-
-
-
-
-
-
-
-
-
-
-
0.1
0.45
0.3
0.4
0.55
0.55
V
V
V
V
V
V
0.65
×
V
CC
-
1.7
2.0
0.7
×
V
CC
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.35
×
V
CC
0.7
0.8
0.3
×
V
CC
V
V
V
V
V
V
V
V
Conditions
Min
Typ
[1]
Max
Unit
74LVC2G126_8
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 08 — 5 May 2008
5 of 17
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