74LVX157TTR [STMICROELECTRONICS]
LOW VOLTAGE QUAD 2 CHANNEL MULTIPLEXER WITH 5V TOLERANT INPUTS; 低电压四路2通道多路复用器，具有5V容限输入
| 型号： | 74LVX157TTR |
| 厂家： | 
ST |
| 描述： | LOW VOLTAGE QUAD 2 CHANNEL MULTIPLEXER WITH 5V TOLERANT INPUTS |
| 文件： | 总9页 (文件大小：190K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
74LVX157
LOW VOLTAGE QUAD 2 CHANNEL MULTIPLEXER
WITH 5V TOLERANT INPUTS
■
HIGH SPEED :
= 5.1 ns (TYP.) at V = 3.3V
t
PD
CC
■
■
5V TOLERANT INPUTS
INPUT VOLTAGE LEVEL :
V =0.8V, V =2V at V =3V
IL
IH
CC
■
■
■
■
■
■
LOW POWER DISSIPATION:
= 2 µA (MAX.) at T =25°C
SOP
TSSOP
I
CC
A
LOW NOISE:
= 0.3V (TYP.) at V = 3.3V
V
OLP
CC
SYMMETRICAL OUTPUT IMPEDANCE:
|I | = I = 4mA (MIN)
ORDER CODES
PACKAGE
OH
OL
TUBE
T & R
BALANCED PROPAGATION DELAYS:
SOP
74LVX157M
74LVX157MTR
74LVX157TTR
t
t
PLH
PHL
TSSOP
OPERATING VOLTAGE RANGE:
(OPR) = 2V to 3.6V (1.2V Data Retention)
V
CC
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 157
IMPROVED LATCH-UP IMMUNITY
POWER DOWN PROTECTION ON INPUTS
input is held high, selection of data is inhibited and
all the outputs become low. The SELECT
decoding determines whether the A or B inputs
get routed to their corresponding Y outputs.
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
system. It combines high speed performance with
the true CMOS low power consumption.
■
■
DESCRIPTION
The 74LVX157 is a low voltage CMOS QUAD 2
CHANNEL MULTIPLEXER fabricated with
sub-micron silicon gate and double-layer metal
wiring C MOS technology. It is ideal for low
power, battery operated and low noise 3.3V
applications.
2
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
It consists of four 2-input digital multiplexers with
common select and strobe inputs. When STROBE
PIN CONNECTION AND IEC LOGIC SYMBOLS
July 2001
1/9
74LVX157
INPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
NAME AND FUNCTION
1
SELECT
1A to 4A
1B to 4B
1Y to 4Y
Common Data Select
Inputs
2, 5, 11, 14
3, 6, 10, 13
Data Inputs From Source
A
Data Inputs From Source
B
4, 7, 9, 12
Multiplexer Outputs
15
8
STROBE Strobe Input
GND
Ground (0V)
16
V
Positive Supply Voltage
CC
TRUTH TABLE
INPUTS
OUTPUT
Y
STROBE
SELECT
A
B
H
L
L
L
L
X
L
X
L
X
X
X
L
L
L
L
H
X
X
H
L
H
H
H
H
X : Don’t Care
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
Supply Voltage
-0.5 to +7.0
-0.5 to +7.0
V
V
CC
V
DC Input Voltage
I
O
V
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Current
-0.5 to V + 0.5
V
CC
I
- 20
± 20
mA
mA
mA
mA
°C
°C
IK
I
OK
I
± 25
O
I
or I
T
DC V
or Ground Current
CC
± 50
CC
GND
Storage Temperature
-65 to +150
300
stg
T
Lead Temperature (10 sec)
L
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
V
Supply Voltage (note 1)
Input Voltage
2 to 3.6
0 to 5.5
V
V
CC
V
I
V
Output Voltage
0 to V
V
O
CC
T
Operating Temperature
-55 to 125
0 to 100
°C
ns/V
op
Input Rise and Fall Time (note 2) (V = 3.3V)
dt/dv
CC
1) Truth Table guaranteed: 1.2V to 3.6V
2) V from 0.8V to 2.0V
IN
2/9
74LVX157
DC SPECIFICATIONS
Test Condition
Value
-40 to 85°C -55 to 125°C Unit
T
= 25°C
Symbol
Parameter
A
V
CC
(V)
Min. Typ. Max. Min. Max. Min. Max.
V
High Level Input
Voltage
2.0
3.0
3.6
2.0
3.0
3.6
2.0
1.5
2.0
2.4
1.5
2.0
2.4
1.5
2.0
2.4
IH
V
V
V
Low Level Input
Voltage
0.5
0.8
0.8
0.5
0.8
0.8
0.5
0.8
0.8
IL
V
High Level Output
Voltage
I =-50 µA
1.9
2.9
2.0
3.0
1.9
2.9
1.9
2.9
2.4
OH
O
I =-50 µA
3.0
3.0
2.0
3.0
3.0
V
V
O
I =-4 mA
2.58
2.48
O
V
Low Level Output
Voltage
I =50 µA
0.0
0.0
0.1
0.1
0.1
0.1
0.1
0.1
OL
O
I =50 µA
O
I =4 mA
0.36
0.44
0.55
O
I
Input Leakage
Current
I
V = 5V or GND
3.6
3.6
± 0.1
± 1
± 1
µA
µA
I
I
Quiescent Supply
Current
CC
V = V
or GND
CC
2
20
20
I
DYNAMIC SWITCHING CHARACTERISTICS
Test Condition
Value
T
= 25°C
Symbol
Parameter
-40 to 85°C -55 to 125°C Unit
A
V
CC
(V)
Min. Typ. Max. Min. Max. Min. Max.
V
Dynamic Low
Voltage Quiet
Output (note 1, 2)
0.3
0.5
0.8
OLP
3.3
3.3
V
-0.5
2
-0.3
OLV
V
Dynamic High
Voltage Input (note
1, 3)
IHD
C = 50 pF
V
L
V
Dynamic Low
Voltage Input (note
1, 3)
3.3
ILD
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 ), 0V to threshold
ILD
(V ), f=1MHz.
IHD
3/9
74LVX157
AC ELECTRICAL CHARACTERISTICS (Input t = t = 3ns)
r
f
Test Condition
Value
T
= 25°C
Symbol
Parameter
-40 to 85°C -55 to 125°C Unit
A
V
C
L
CC
(V) (pF)
Min. Typ. Max. Min. Max. Min. Max.
t
t
t
t
Propagation Delay
Time
(A, B - Y)
2.7
2.7
15
50
15
6.6
9.1
5.1
12.5
16.0
7.9
1.0
1.0
1.0
15.5
19.0
9.5
1.0
1.0
1.0
16.5
20.0
11.0
PLH PHL
ns
ns
(*)
3.3
3.3
(*)
50
15
50
15
7.6
8.9
11.4
16.9
1.0
1.0
1.0
1.0
13.0
20.5
24.0
13.0
1.0
1.0
1.0
1.0
14.0
21.5
26.0
14.0
t
Propagation Delay
Time
(SELECT - Y)
2.7
2.7
PLH PHL
11.4 20.4
(*)
7.0
9.5
9.1
11.0
14.5
17.6
3.3
3.3
(*)
50
15
50
15
1.0
1.0
1.0
1.0
16.5
20.5
20.4
13.5
1.0
1.0
1.0
1.0
17.5
21.5
21.4
14.5
t
Propagation Delay
Time
(STROBE - Y)
2.7
2.7
PLH PHL
11.6 21.1
ns
ns
(*)
7.2
11.5
3.3
3.3
(*)
50
50
9.7
0.5
0.5
15.0
1.0
1.0
17.0
1.5
1.0
18.0
1.5
t
t
Output To Output
Skew Time (note1,
2)
2.7
OSLH
OSHL
(*)
1.0
1.5
1.5
3.3
50
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
CAPACITIVE CHARACTERISTICS
Test Condition
Value
T
= 25°C
Symbol
Parameter
-40 to 85°C -55 to 125°C Unit
A
V
CC
(V)
Min. Typ. Max. Min. Max. Min. Max.
C
Input Capacitance
3.3
4
10
10
pF
pF
IN
C
Power Dissipation
Capacitance
(note 1)
PD
f
= 10MHz
3.3
20
IN
1) C is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
PD
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
= C x V x f + I /n (per circuit)
CC(opr)
PD CC IN CC
4/9
74LVX157
TEST CIRCUIT
C
R
=15/50pF or equivalent (includes jig and probe capacitance)
L
T
= Z
of pulse generator (typically 50Ω)
OUT
WAVEFORM 1 : PROPAGATION DELAYS FOR INVERTING CONDITIONS (f=1MHz; 50% duty cycle)
5/9
74LVX157
WAVEFORM 2 : PROPAGATION DELAYS FOR NON-INVERTING CONDITIONS
(f=1MHz; 50% duty cycle)
6/9
74LVX157
SO-16 MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
TYP
MAX.
1.75
0.2
MIN.
MAX.
0.068
0.007
0.064
0.018
0.010
A
a1
a2
b
0.1
0.003
1.65
0.46
0.25
0.35
0.19
0.013
0.007
b1
C
0.5
0.019
c1
D
45° (typ.)
9.8
5.8
10
0.385
0.228
0.393
0.244
E
6.2
e
1.27
8.89
0.050
0.350
e3
F
3.8
4.6
0.5
4.0
5.3
0.149
0.181
0.019
0.157
0.208
0.050
0.024
G
L
1.27
0.62
M
S
8° (max.)
PO13H
7/9
74LVX157
TSSOP16 MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
TYP
MAX.
1.2
MIN.
MAX.
0.047
0.006
0.041
0.012
0.0089
0.201
0.260
0.176
A
A1
A2
b
0.05
0.8
0.15
1.05
0.30
0.20
5.1
0.002
0.031
0.007
0.004
0.193
0.244
0.169
0.004
0.039
1
0.19
0.09
4.9
c
D
5
6.4
0.197
0.252
E
6.2
6.6
E1
e
4.3
4.4
4.48
0.173
0.65 BSC
0.0256 BSC
K
0°
8°
0°
8°
L
0.45
0.60
0.75
0.018
0.024
0.030
A2
A
K
L
b
e
A1
c
E
D
E1
PIN 1 IDENTIFICATION
1
0080338D
8/9
74LVX157
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
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
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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© 2001 STMicroelectronics - Printed in Italy - All Rights Reserved
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9/9
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