74LX1G126
SINGLE BUS BUFFER (3-STATE)
■
■
■
■
■
■
■
■
5V TOLERANT INPUTS
HIGH SPEED: t
PD
= 4.5ns (MAX.) at V
CC
I
LOW POWER DISSIPATION:
CC
= 1
µ
A (MAX.) at T
A
= 25°C
= 3V
POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 24mA (MIN) at V
CC
= 3V t
BALANCED PROPAGATION DELAYS:
PLH
≅ t
PHL
OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 1.65V to 5.5V
(1.2V Data Retention)
IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The 74LX1G126 is a low voltage CMOS SINGLE
BUS BUFFER fabricated with sub-micron silicon gate and double-layer metal wiring C
2
MOS technology.
3-STATE control input G has to be set LOW to place the output into the high impedance state.
SOT23-5L SOT323-5L
ORDER CODES
PACKAGE
SOT23-5L
SOT323-5L
T & R
74LX1G126STR
74LX1G126CTR
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.
All inputs and outputs are equipped with protection circuits against static discharge.
PIN CONNECTION AND IEC LOGIC SYMBOLS
April 2004 1/12
74LX1G126
INPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN N°
1
2
4
3
5
SYMBOL
1G
1A
1Y
GND
V
CC
NAME AND FUNCTION
Output Enable Input
Data Input
Data Output
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
A
X
L
H
X : Don’t Care
Z : High Impedance
G
L
H
H
Y
Z
L
H
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
CC
V
I
V
O
V
O
I
IK
I
OK
I
O
I
CC or I
GND
T stg
T
L
Supply Voltage
DC Input Voltage
DC Output Voltage (V
CC
= 0V)
DC Output Voltage (High or Low State) (note 1)
DC Input Diode Current
DC Output Diode Current (note 2)
DC Output Current
DC V
CC or Ground Current per Supply Pin
Storage Temperature
Lead Temperature (10 sec)
-0.5 to +7.0
-0.5 to +7.0
-0.5 to +7.0
-0.5 to V
CC
+ 0.5
- 50
- 50
±
50
±
50
-65 to +150
300
V
V
V
V mA mA mA mA
°C
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied
1) I
O
2) V
O absolute maximum rating must be observed Obsolete Product(s) - Obsolete Product(s)
2/12
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter
V
CC
V
I
V
O
V
O
I
OH
, I
OL
I
OH
, I
OL
I
OH
, I
OL
I
OH
, I
OL
I
OH
, I
OL
T op dt/dv
Supply Voltage (note 1)
Input Voltage
Output Voltage (V
CC
= 0V)
Output Voltage (High or Low State)
High or Low Level Output Current (V
CC
High or Low Level Output Current (V
CC
High or Low Level Output Current (V
CC
High or Low Level Output Current (V
CC
High or Low Level Output Current (V
Operating Temperature
Input Rise and Fall Time (note 2)
1) Truth Table guaranteed: 1.2V to 3.6V
2) V
IN from 0.8V to 2V at V
CC
= 3.0V
CC
= 4.5 to 5.5V)
= 3.0 to 3.6V)
= 2.7 to 3.0V)
= 2.3 to 2.7V)
= 1.65 to 2.3V)
74LX1G126
Value
1.65 to 5.5
0 to 5.5
0 to 5.5
0 to V
CC
±
32
±
24
±
12
±
8
±
4
-55 to 125
0 to 10
Unit
V
V
V
V mA mA mA mA mA
°C ns/V
3/12
74LX1G126
DC SPECIFICATIONS
Symbol
V
V
V
I
I
V
I
IH
IL
OH
OL
OZ
I
I off
CC
Test Condition
Parameter
High Level Input
Voltage
Low Level Input
Voltage
V
CC
(V)
1.65 to 1.95
2.3 to 2.7
3.0 to 5.5
1.65 to 1.95
2.3 to 2.7
3.0 to 5.5
1.65 to 4.5
1.65
2.3
High Level Output
Voltage
Low Level Output
Voltage
3.0
4.5
1.65 to 4.5
1.65
2.3
3.0
4.5
I
O
=-100
µ
A
I
O
=-4 mA
I
O
=-8 mA
I
O
=-16 mA
I
O
=-24 mA
I
O
=-32 mA
I
O
=100
µ
A
I
O
=4 mA
I
O
=8 mA
I
O
=16 mA
I
O
=24 mA
I
O
=32 mA
High Impedance
Output Leakage
Current
Input Leakage
Current
Power Off Leakage
Current
Quiescent Supply
Current
3.6
1.65 to 5.5
0
1.65 to 5.5
3.6
V
V
I
I
= 0 to 5.5V
= 0 to 5.5V
V
I or V
O
= 5.5V
V
I
= V
CC or GND
V
I or V
O
= 3.6 to 5.5V
Value
-40 to 85 °C
Min.
0.75V
CC
0.7V
CC
0.7V
CC
Max.
0.25V
CC
0.3V
CC
0.3V
CC
V
CC
-0.1
1.2
1.9
2.4
2.2
3.8
0.1
0.45
0.3
0.4
0.55
0.55
-55 to 125 °C
Min.
0.75V
CC
0.7V
CC
0.7V
CC
V
CC
-0.1
1.2
1.9
2.4
2.2
3.8
Max.
0.25V
0.3V
0.3V
0.1
0.45
0.3
0.4
0.55
0.55
CC
CC
CC
±
±
10
10
10
10
±
10
±
±
10
10
10
10
±
10
Unit
µ
µ
µ
µ
V
V
V
V
A
A
A
A
4/12
74LX1G126
AC ELECTRICAL CHARACTERISTICS (Input t r
= t f
= 3ns)
Symbol t
PLH t
PHL t
PLZ t
PHZ t
PZL t
PZH
Test Condition
Parameter
V
CC
(V)
C
L
(pF)
R
L
(
Ω
) t s
= t
(ns)
Propagation Delay
Time
1.65 to 1.95
2.3 to 2.7
3.0 to 3.6
4.5 to 5.5
15 1M
Ω
3.0
1.65 to 1.95
30 1000 2.0
2.3 to 2.7
30 500 2.0
2.7
3.0 to 3.6
4.5 to 5.5
50
50
50
500
500
500
2.5
2.5
2.5
Output Disable Time 1.65 to 1.95
2.3 to 2.7
15 1M
Ω
3.0
3.0 to 3.6
4.5 to 5.5
1.65 to 1.95
30 1000 2.0
2.3 to 2.7
2.7
3.0 to 3.6
4.5 to 5.5
Output Enable Time 1.65 to 1.95
2.3 to 2.7
3.0 to 3.6
30
50
50
50
15
500
500
500
500
1M
Ω
3.0
2.0
2.5
2.5
2.5
4.5 to 5.5
1.65 to 1.95
30 1000 2.0
2.3 to 2.7
2.7
30
50
500
500
2.0
2.5
3.0 to 3.6
4.5 to 5.5
50
50
500
500
2.5
2.5
r
-40 to 85 °C
Min.
1
2
2
1
1
1
1
1
2
1
1
1
2
2
2
1
1
1
1
2
2
2
2
2
2
1
1
Max.
5.5
9.4
6.6
5.6
5.3
5.0
5.5
5.0
9.8
6.0
5.7
5.5
4.2
12.0
7.0
6.0
12.0
7.0
4.7
4.1
8.0
5.5
5.2
4.5
4.0
12.0
7.0
Value
-55 to 125 °C
Min.
1
2
2
1
1
1
1
1
2
1
1
1
2
2
2
1
1
1
1
2
2
2
2
2
2
1
1
Max.
5.5
9.4
6.6
5.6
5.3
5.0
5.5
5.0
9.8
6.0
5.7
5.5
4.2
12.0
7.0
6.0
12.0
7.0
4.7
4.1
8.0
5.5
5.2
4.5
4.0
12.0
7.0
Unit ns ns ns
CAPACITIVE CHARACTERISTICS
Test Condition Value
Symbol Parameter
V
CC
(V)
T
A
= 25 °C Unit
Min.
Typ.
Max.
C
C
IN
OUT
PD
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
(note 1)
1.8
2.5
3.3
V
IN
= 0 or V
CC
V
IN
= 0 or V
CC f
IN
= 10MHz
4
5
18
18
21
10 pF pF pF
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
5/12
74LX1G126
TEST CIRCUIT
R
T
= Z
OUT of pulse generator (typically 50
Ω
)
TEST CIRCUIT AND WAVEFORM SYMBOL VALUE
Symbol
C
L
R
L
=R
1
V
IH
V
M t r
= t r
1.65 to 1.95V
15pF/30pF
1M
Ω/
1000
Ω
V
CC
V
CC
/2
<2.0ns
V
CC
2.3 to 2.7V
15pF/30pF
1M
Ω/
500
Ω
V
CC
V
CC
/2
<2.0ns
WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
2.7 to 5.5V
15pF/50pF
1M
Ω/
500
Ω
V
CC
V
CC
/2
<2.5ns
6/12
WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)
74LX1G126
7/12
74LX1G126
DIM.
e
H
L
D
E b
C
A
A1
A2
0.35
0.09
2.80
1.50
MIN.
0.90
0.00
0.90
2.60
0.10
SOT23-5L MECHANICAL DATA
mm.
TYP
0.50
0.20
3.00
1.75
MAX.
1.45
0.10
1.30
13.7
3.5
110.2
59.0
MIN.
35.4
0.0
35.4
0.95
3.00
0.60
102.3
3.9
mils
TYP.
37.4
19.7
7.8
118.1
68.8
MAX.
57.1
3.9
51.2
118.1
23.6
.
7049676C
8/12
DIM.
E1 e
D
E e1
L
A
A1
A2 b
C
74LX1G126
MIN.
0.80
0.00
0.80
0.15
0.10
1.80
1.80
1.15
0.10
SOT323-5L MECHANICAL DATA
mm.
TYP MAX.
1.10
0.10
1.00
0.30
0.18
2.20
2.40
1.35
MIN.
31.5
0.0
31.5
5.9
3.9
70.9
70.9
45.3
0 .65
1.3
0.30
3.9
mils
TYP.
25.6
51.2
MAX.
43.3
3.9
39.4
11.8
7.1
86.6
94.5
53.1
11.8
9/12
74LX1G126
DIM.
A
C
D
N
T
Ao
Bo
Ko
Po
P
3.13
3.07
1.27
3.9
3.9
MIN.
12.8
20.2
60
Tape & Reel SOT23-xL MECHANICAL DATA
mm.
TYP MIN.
inch
TYP.
13.0
MAX.
180
13.2
0.512
0.504
0.795
2.362
3.23
3.17
1.37
4.0
4.0
14.4
3.33
3.27
1.47
4.1
4.1
0.123
0.120
0.050
0.153
0.153
0.127
0.124
0.054
0.157
0.157
MAX.
7.086
0.519
0.567
0.131
0.128
0.0.58
0.161
0.161
10/12
DIM.
T
Ao
Bo
Ko
Po
P
A
C
D
N
74LX1G126
MIN.
175
12.8
20.2
59.5
Tape & Reel SOT323-xL MECHANICAL DATA
mm.
TYP
180
13
MAX.
185
13.2
MIN.
6.889
0.504
0.795
inch
TYP.
7.086
0.512
60 2.362
60.5
14.4
3.9
3.8
2.25
2.7
1.2
4
4
4.1
4.2
0.153
0.149
0.088
0.106
0.047
0.157
0.157
MAX.
7.283
0.519
0.567
0.161
0.165
11/12
74LX1G126
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from Obsolete Product(s) - Obsolete Product(s) mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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All other names are the property of their respective owners
© 2004 STMicroelectronics - All Rights Reserved
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