74LVX126
LOW VOLTAGE CMOS QUAD BUS BUFFERS (3-STATE)
WITH 5V TOLERANT INPUTS
s
s
s
s
s
s
s
s
s
s
s
HIGH SPEED:
t
PD
=4.4ns (TYP.) at V
CC
= 3.3V
5V TOLERANT INPUTS
POWER-DOWN PROTECTION ON INPUTS
INPUT VOLTAGE LEVEL:
V
IL
= 0.8V, V
IH
= 2V at V
CC
=3V
LOW POWER DISSIPATION:
I
CC
= 2
µA
(MAX.) at T
A
=25°C
LOW NOISE:
V
OLP
= 0.3V (TYP.) at V
CC
=3.3V
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 4 mA (MIN) at V
CC
=3V
BALANCED PROPAGATION DELAYS:
t
PLH
≅
t
PHL
OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2V to 3.6V (1.2V Data Retention)
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 126
IMPROVED LATCH-UP IMMUNITY
SOP
TSSOP
Table 1: Order Codes
PACKAGE
SOP
TSSOP
T&R
74LVX126MTR
74LVX126TTR
DESCRIPTION
The 74LVX126 is a low voltage CMOS QUAD
BUS BUFFERs fabricated with sub-micron silicon
gate and double-layer metal wiring C
2
MOS
technology. It is ideal for low power, battery
operated and low noise 3.3V applications.
Figure 1: Pin Connection And IEC Logic Symbols
This device requires the 3-STATE control input G
to be set low to place the output go in to the high
impedance state.
Power down protection is provided on all inputs
and 0 to 7V can be accepted on inputs with no
regard to the supply voltage. This device can be
used to interface 5V to 3V. It combines high speed
performance with the true CMOS low power
consumption.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
August 2004
Rev. 2
1/12
74LVX126
Figure 2: Input Equivalent Circuit
Table 2: Pin Description
PIN N°
1, 4, 10, 13
2, 5, 9, 12
3, 6, 8, 11
7
14
SYMBOL
1G to 4G
1A to 4A
1Y to 4Y
GND
V
CC
NAME AND FUNCTION
Output Enable Inputs
Data Inputs
Data Outputs
Ground (0V)
Positive Supply Voltage
Table 3: Truth Table
A
X
L
H
X :Don‘t Care
Z : High Impedance
G
L
H
H
Y
Z
L
H
Table 4: Absolute Maximum Ratings
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Current
Parameter
Value
-0.5 to +7.0
-0.5 to +7.0
-0.5 to V
CC
+ 0.5
- 20
±
20
±
25
±
50
-65 to +150
300
Unit
V
V
V
mA
mA
mA
mA
°C
°C
I
CC
or I
GND
DC V
CC
or Ground Current
Storage Temperature
T
stg
T
L
Lead Temperature (10 sec)
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
Table 5: Recommended Operating Conditions
Symbol
V
CC
V
I
V
O
T
op
dt/dv
Supply Voltage (note 1)
Input Voltage
Output Voltage
Operating Temperature
Input Rise and Fall Time (note 2) (V
CC
= 3V)
Parameter
Value
2 to 3.6
0 to 5.5
0 to V
CC
-55 to 125
0 to 100
Unit
V
V
V
°C
ns/V
1) Truth Table guaranteed: 1.2V to 3.6V
2) V
IN
from 0.8V to 2.0V
2/12
74LVX126
Table 6: DC Specifications
Test Condition
Symbol
Parameter
V
CC
(V)
2.0
3.0
3.6
2.0
3.0
3.6
2.0
3.0
3.0
V
OL
Low Level Output
Voltage
2.0
3.0
3.0
I
OZ
High Impedance
Output Leakage
Current
Input Leakage
Current
Quiescent Supply
Current
3.6
3.6
3.6
I
O
=-50
µA
I
O
=-50
µA
I
O
=-4 mA
I
O
=50
µA
I
O
=50
µA
I
O
=4 mA
V
I
= V
IH
or V
IL
V
O
= V
CC
or GND
V
I
= 5.5V or GND
V
I
= V
CC
or GND
T
A
= 25°C
Min.
1.5
2
2.4
0.5
0.8
0.8
1.9
2.9
2.58
0.0
0.0
0.1
0.1
0.36
±0.25
±
0.1
2
2.0
3.0
1.9
2.9
2.48
0.1
0.1
0.44
±
2.5
±
1
20
Typ.
Max.
Value
-40 to 85°C
Min.
1.5
2
2.4
0.5
0.8
0.8
1.9
2.9
2.4
0.1
0.1
0.55
±
5
±
1
20
µA
µA
µA
V
V
Max.
-55 to 125°C
Min.
1.5
2
2.4
0.5
0.8
0.8
Max.
V
Unit
V
IH
High Level Input
Voltage
Low Level Input
Voltage
High Level Output
Voltage
V
IL
V
V
OH
I
I
I
CC
Table 7: Dynamic Switching Characteristics
Test Condition
Symbol
Parameter
V
CC
(V)
3.3
T
A
= 25°C
Min.
Typ.
0.3
-0.5
C
L
= 50 pF
2.0
-0.3
V
Max.
0.5
Value
-40 to 85°C
Min.
Max.
-55 to 125°C
Min.
Max.
Unit
V
OLP
V
OLV
V
IHD
V
ILD
Dynamic Low
Voltage Quiet
Output (note 1, 2)
Dynamic High
Voltage Input
(note 1, 3)
Dynamic Low
Voltage Input
(note 1, 3)
3.3
3.3
0.8
1) Worst case package.
2) Max number of outputs defined as (n). Data inputs are driven 0V to 3.3V, (n-1) outputs switching and one output at GND.
3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.3V. Inputs under test switching: 3.3V to threshold (V
ILD
), 0V to threshold
(V
IHD
), f=1MHz.
3/12
74LVX126
Table 8: AC Electrical Characteristics
(Input t
r
= t
f
= 3ns)
Test Condition
Symbol
Parameter
V
CC
(V)
2.7
2.7
3.3
(*)
3.3
(*)
t
PZL
t
PZH
Output Enable
Time
2.7
2.7
3.3
(*)
3.3
(*)
t
PLZ
t
PHZ
t
OSLH
t
OSHL
Output Disable
Time
Output to Output
Skew Time (note
1,2)
2.7
3.3
(*)
2.7
3.3
(*)
C
L
(pF)
15
50
15
50
15
50
15
50
50
50
50
50
T
A
= 25°C
Min.
Typ.
5.8
7.0
4.4
5.9
8.9
10.0
8.0
8.9
7.2
6.0
0.5
0.5
Max.
8.0
10.5
6.2
9.7
11.5
14.0
10.4
12
11.0
8.5
1.0
1.0
Value
-40 to 85°C
Min.
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Max.
9.6
12.6
8.5
12.0
12.5
16.0
11.5
13.0
13.0
11.0
1.5
1.5
-55 to 125°C
Min.
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Max.
11.5
15.0
9.5
13.5
12.5
16.0
11.5
13.0
15.6
13.0
1.5
1.5
ns
ns
ns
ns
Unit
t
PLH
t
PHL
Propagation Delay
Time
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-
ing in the same direction, either HIGH or LOW
2) Parameter guaranteed by design
(*) Voltage range is 3.3V
±
0.3V
Table 9: Capacitive Characteristics
Test Condition
Symbol
Parameter
V
CC
(V)
3.3
3.3
3.3
T
A
= 25°C
Min.
Typ.
4
6
14
Max.
10
Value
-40 to 85°C
Min.
Max.
10
-55 to 125°C
Min.
Max.
10
pF
pF
pF
Unit
C
IN
C
OUT
C
PD
Input Capacitance
Output
Capacitance
Power Dissipation
Capacitance
(note 1)
1) C
PD
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
CC(opr)
= C
PD
x V
CC
x f
IN
+ I
CC
/4 (per circuit)
4/12
74LVX126
Figure 3: Test Circuit
TEST
t
PLH
, t
PHL
t
PZL
, t
PLZ
t
PZH
, t
PHZ
C
L
=15/50pF or equivalent (includes jig and probe capacitance)
R
L
= R1 = 1KΩ or equivalent
R
T
= Z
OUT
of pulse generator (typically 50Ω)
SWITCH
Open
V
CC
GND
Figure 4: Waveform - Propagation Delays
(f=1MHz; 50% duty cycle)
5/12
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