74LCX157MTC [ONSEMI]
低电压四路 2 输入多路复用器，带 5V 耐压输入;
| 型号： | 74LCX157MTC |
| 厂家： | 
ONSEMI |
| 描述： | 低电压四路 2 输入多路复用器，带 5V 耐压输入 光电二极管 逻辑集成电路 复用器 |
| 文件： | 总12页 (文件大小：417K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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April 2015
74LCX157
Low Voltage Quad 2-Input Multiplexer
with 5 V Tolerant Inputs
Features
General Description
• 5 V Tolerant Inputs
The LCX157 is a high-speed quad 2-input multiplexer.
Four bits of data from two sources can be selected using
the common Select and Enable inputs. The four outputs
present the selected data in the true (noninverted) form.
• 2.3 V – 3.6 V, VCC Specifications Provided
• 5.8 ns tPD max. (VCC = 3.3 V), 10 μA ICC max.
• Power Down High Impedance Inputs and Outputs
• ±24 mA Output Drive (VCC = 3.0 V)
• Implements Patented Noise/EMI Reduction Circuitry
• Latch-Up Performance Exceeds 500 mA
• ESD Performance:
The LCX157 can also be used as a function generator.
The 74LCX157 is fabricated with advanced CMOS tech-
nology to achieve high speed operation while maintain-
ing CMOS low power dissipation.
Human Body Model > 2000 V
Machine Model > 200 V
Ordering Information
Part Number
74LCX157M
Top Mark
LCX157
LCX157
LCX157
LCX157
Package
SOIC 16L
Packing Method
Rail
74LCX157MX
74LCX157MTC
74LCX157MTCX
SOIC 16L
Tape and Reel
Rail
TSSOP 16L
TSSOP 16L
Tape and Reel
© 1995 Fairchild Semiconductor Corporation
74LCX157 Rev. 1.3
www.fairchildsemi.com
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
Description
I
0a–I0d
1a–I1d
E
Source 0 Data Inputs
Source 1 Data Inputs
Enable Input
I
S
Select Input
Za–Zd
Outputs
Functional Description
Truth Table
The LCX157 is a quad 2-input multiplexer. It selects four
bits of data from two sources under the control of a com-
mon Select input (S). The Enable input (E) is active-LOW.
Inputs
Outputs
E
S
I0
I1
Z
When E is HIGH, all of the outputs (Z) are forced LOW
regardless of all other inputs. The LCX157 is the logic
implementation of a 4-pole, 2-position switch where the
position of the switch is determined by the logic levels
supplied to the Select input. The logic equations for the
outputs are shown below:
H
L
L
L
L
X
H
H
L
X
X
X
L
X
L
L
L
H
X
X
H
L
Za = E • (I1a • S + I0a • S)
Zb = E • (I1b • S + I0b • S)
Zc = E • (I1c • S + I0c • S)
Zd = E • (I1d • S + I0d • S)
L
H
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
A common use of the LCX157 is the moving of data from
two groups of registers to four common output busses.
The particular register from which the data comes is
determined by the state of the Select input. A less obvi-
ous use is as a function generator. The LCX157 can gen-
erate any four of the sixteen different functions of two
variables with one variable common. This is useful for
implementing gating functions.
© 1995 Fairchild Semiconductor Corporation
74LCX157 Rev. 1.3
www.fairchildsemi.com
2
Logic Diagram(1)
Note:
1. Please note that this diagram is provided only for the understanding of logic operations and should not be used to
estimate propagation delays.
Absolute Maximum Ratings(2)
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera-
ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi-
tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The
absolute maximum ratings are stress ratings only.
Symbol
VCC
VI
Parameter
Supply Voltage
Value
-0.5 to +7.0
-0.5 to +7.0
-0.5 to VCC+0.5
-50
Conditions
Unit
V
DC Input Voltage
V
VO
DC Output Voltage
DC Input Diode Current
Output in HIGH or LOW State(3)
VI < GND
V
IIK
mA
-50
VO < GND
IOK
DC Output Diode Current
mA
+50
VO > VCC
IO
DC Output Source/Sink Current
DC Supply Current per Supply Pin
DC Ground Current per Ground Pin
Storage Temperature
±50
mA
mA
mA
°C
ICC
±100
IGND
TSTG
Notes:
±100
-65 to +150
2. The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The
device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are
not guaranteed at the Absolute Maximum Ratings. The “Recommended Operating Conditions” table will define the
conditions for actual device operation.
3. IO Absolute Maximum Rating must be observed.
© 1995 Fairchild Semiconductor Corporation
74LCX157 Rev. 1.3
www.fairchildsemi.com
3
Recommended Operating Conditions(4)
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to absolute maximum ratings.
Symbol
VCC
Parameter
Min.
2.0
0
Max.
3.6
5.5
VCC
±24
±12
±8
Unit
V
Supply Voltage
Input Voltage
Output Voltage
Operating
VIN
V
VOUT
HIGH or LOW State
0
V
VCC = 3.0 V - 3.6 V
I
OH/IOL
Output Current
VCC = 2.7 V - 3.0 V
VCC = 2.3 V - 2.7 V
mA
TA
Free-Air Operating Temperature
Input Edge Rate, VIN = 0.8 V - 2.0 V, VCC = 3.0 V
-40
0
85
°C
Δt/ΔV
10
ns/V
Note:
4. Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
TA = -40 to +85°C
Symbol
VIH
Parameter
Conditions
VCC (V)
Unit
V
Min.
1.7
Max.
2.3 - 2.7
2.7 - 3.6
2.3 - 2.7
2.7 - 3.6
2.3 - 3.6
2.3
HIGH Level Input Voltage
LOW Level Input Voltage
2.0
0.7
0.8
VIL
V
IOH = -100 μA
VCC - 0.2
1.8
I
OH = -8 mA
VOH
IOH = -12 mA
IOH = -18 mA
IOH = -24 mA
IOL = 100 μA
2.7
2.2
V
V
HIGH Level Output Voltage
LOW Level Output Voltage
3.0
2.4
3.0
2.2
2.3 - 3.6
2.3
0.2
0.6
0.4
0.4
0.55
±5.0
10
I
OL = 8 mA
VOL
IOL = 12 mA
2.7
IOL = 16 mA
3.0
IOL = 24 mA
3.0
II
0 ≤ VI ≤ 5.5 V
VI or VO = 5.5 V
VI = VCC or GND
3.6 V ≤ VI ≤ 5.5 V
2.3 - 3.6
0
μA
μA
Input Leakage Current
IOFF
Power-Off Leakage Current
2.3 - 3.6
2.3 - 3.6
10
ICC
μA
μA
Quiescent Supply Current
Increase in ICC per Input
±10
ΔICC
VIH = VCC - 0.6 V
2.3 - 3.6
500
© 1995 Fairchild Semiconductor Corporation
74LCX157 Rev. 1.3
www.fairchildsemi.com
4
AC Electrical Characteristics
TA = -40 to +85°C, RL = 500 Ω
VCC = 3.3 V ± 0.3 V
CL = 50 pF
VCC = 2.7 V
CL = 50 pF
V
CC = 2.5 V ± 0.2 V
Symbol
Parameter
Unit
CL = 30 pF
Min.
1.5
1.5
1.5
1.5
1.5
1.5
Max.
7.0
7.0
7.0
7.0
5.8
5.8
1.0
1.0
Min.
Max.
8.0
8.0
8.0
8.0
6.3
6.3
Min.
1.5
1.5
1.5
1.5
1.5
1.5
Max.
8.4
8.4
8.4
8.4
7.0
7.0
tPHL
tPLH
1.5
1.5
1.5
1.5
1.5
1.5
Propagation Delay
S -> Zn
ns
ns
ns
ns
tPHL
Propagation Delay
E -> Zn
tPLH
tPHL
Propagation Delay
In -> Zn
tPLH
tOSHL
tOSLH
Note:
Output to Output Skew(5)
5. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate
outputs of the same device. The specification applies to any outputs switching in the same direction, either HIGH-to-
LOW (tOSHL) or LOW-to-HIGH (tOSLH). Parameter guaranteed by design.
Dynamic Switching Characteristics
TA = 25°C
Symbol
VOLP
Parameter
Conditions
VCC (V)
Unit
V
Typical
0.8
CL = 50 pF, VIH = 3.3 V, VIL = 0 V
CL = 30 pF, VIH = 2.5 V, VIL = 0 V
CL = 50 pF, VIH = 3.3 V, VIL = 0 V
CL = 30 pF, VIH = 2.5 V, VIL = 0 V
3.3
2.5
3.3
2.5
Quiet Output Dynamic Peak VOL
Quiet Output Dynamic Valley VOL
0.6
-0.8
VOLV
V
-0.6
Capacitance
Symbol
Parameter
Conditions
VCC = Open, VI = 0 V or VCC
VCC = 3.3 V, VI = 0 V or VCC
Typical
Unit
pF
CIN
COUT
CPD
Input Capacitance
7
8
Output Capacitance
pF
Power Dissipation Capacitance VCC = 3.3 V, VI = 0 V or VCC, f = 10 MHz
25
pF
© 1995 Fairchild Semiconductor Corporation
74LCX157 Rev. 1.3
www.fairchildsemi.com
5
AC Loading and Waveforms Generic for LCX Family
Figure 1. AC Test Circuit (CL includes probe and jig capacitance)
Test
Switch
tPLH, tPHL
tPZL, tPLZ
Open
6V at VCC = 3.3 0.3V
VCC x 2 at VCC = 2.5 0.2V
tPZH, tPHZ
GND
3-STATE Output Low Enable and
Disable Times for Logic
Waveform for Inverting and Non-Inverting Functions
Setup Time, Hold Time and Recovery Time for Logic
Propagation Delay. Pulse Width and trec Waveforms
3-STATE Output High Enable and
Disable Times for Logic
t
rise and tfall
Figure 2. Waveforms
(Input Characteristics; f = 1 MHz, tr = tf = 3 ns)
VCC
Symbol
3.3V 0.3V
1.5V
2.7V
1.5V
2.5V 0.2V
Vmi
Vmo
Vx
VCC/2
VCC/2
1.5V
1.5V
VOL + 0.3V
VOH − 0.3V
VOL + 0.3V
VOH − 0.3V
VOL + 0.15V
VOH − 0.15V
Vy
© 1995 Fairchild Semiconductor Corporation
74LCX157 Rev. 1.3
www.fairchildsemi.com
6
Schematic Diagram Generic for LCX Family
© 1995 Fairchild Semiconductor Corporation
74LCX157 Rev. 1.3
www.fairchildsemi.com
7
Physical Dimensions
10.00
9.80
A
8.89
16
9
B
1.75
4.00
3.80
6.00
5.6
1
8
PIN ONE
INDICATOR
0.51
0.35
1.27
(0.30)
1.27
0.65
M
0.25
C B A
LAND PATTERN RECOMMENDATION
1.75 MAX
1.50
SEE DETAIL A
1.25
0.25
0.19
0.25
0.10
C
0.10
C
0.50
0.25
X 45°
NOTES: UNLESS OTHERWISE SPECIFIED
(R0.10)
A) THIS PACKAGE CONFORMS TO JEDEC
MS-012, VARIATION AC, ISSUE C.
GAGE PLANE
0.36
(R0.10)
B) ALL DIMENSIONS ARE IN MILLIMETERS.
C) DIMENSIONS ARE EXCLUSIVE OF BURRS, MOLD
FLASH AND TIE BAR PROTRUSIONS
8°
0°
D) CONFORMS TO ASME Y14.5M-1994
E) LANDPATTERN STANDARD: SOIC127P600X175-16AM
F) DRAWING FILE NAME: M16AREV12.
SEATING PLANE
0.90
0.50
(1.04)
DETAIL A
SCALE: 2:1
Figure 3. 16-LEAD, SOIC, JEDEC MS-012, 0.150 INCH, NARROW BODY
© 1995 Fairchild Semiconductor Corporation
74LCX157 Rev. 1.3
www.fairchildsemi.com
8
Physical Dimensions (Continued)
5.00 0.10
4.55
5.90
4.45 7.35
0.65
4.4 0.1
1.45
5.00
0.11
12°
MTC16rev4
Figure 4. 16-LEAD, TSSOP, JEDEC MO-153, 4.4 MM WIDE
© 1995 Fairchild Semiconductor Corporation
74LCX157 Rev. 1.3
www.fairchildsemi.com
9
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Rev. I74
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Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9137LG
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9122E
500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
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