74VHC157MTCX [ONSEMI]
四通道2输入复用器;型号: | 74VHC157MTCX |
厂家: | ONSEMI |
描述: | 四通道2输入复用器 光电二极管 逻辑集成电路 复用器 |
文件: | 总12页 (文件大小:371K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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May 2007
74VHC157
tm
Quad 2-Input Multiplexer
Features
General Description
■ High Speed: t = 4.1ns (Typ.) at V = 5V
The VHC157 is an advanced high speed CMOS Quad
2-Channel Multiplexer fabricated with silicon gate CMOS
technology. It achieves the high speed operation similar
to equivalent Bipolar Schottky TTL while maintaining the
CMOS low power dissipation.
PD
CC
■ Low power dissipation: I = 4µA (Max.) at T = 25°C
CC
A
■ High noise immunity: V
= V
= 28% V (Min.)
NIH
NIL
CC
■ Power down protection is provided on all inputs
■ Low noise: V = 0.8V (Max.)
OLP
It consists of four 2-input digital multiplexers with com-
mon select and enable inputs. When the ENABLE input
is held “H” level, selection of data is inhibited and all the
outputs become “L” level. The SELECT decoding deter-
■ Pin and function compatible with 74HC157
mines whether the I or I inputs get routed to their cor-
0x
1x
responding outputs.
An Input protection circuit ensures that 0V to 7V can be
applied to the input pins without regard to the supply
voltage. This device can be used to interface 5V to 3V
systems and on two supply systems such as battery
back up. This circuit prevents device destruction due to
mismatched supply and input voltages.
Ordering Information
Package
Order Number
Number
Package Description
74VHC157M
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150”
Narrow
74VHC157SJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74VHC157MTC
MTC16
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153,
4.4mm Wide
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the
ordering number.
Connection Diagram
Pin Description
Pin Names
Description
I
I
–I
Source 0 Data Inputs
0a 0d
–I
Source 1 Data Inputs
Enable Input
Select Input
1a 1d
E
S
Z –Z
Outputs
a
d
©1992 Fairchild Semiconductor Corporation
74VHC157 Rev. 1.2
www.fairchildsemi.com
Logic Symbols
Functional Description
The VHC157 is a quad 2-input multiplexer. It selects four
bits of data from two sources under the control of a
common Select input (S). The Enable input (E) is active-
LOW. When E is HIGH, all of the outputs (Z) are forced
LOW regardless of all other inputs. The VHC157 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:
Z = E • (I • S + I • S)
a
1a
0a
Z = E • (I • S + I • S)
IEEE/IEC
b
1b
0b
Z = E • (I • S + I • S)
c
1c
0c
Z = E • (I • S + I • S)
d
1d
0d
A common use of the VHC157 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 VHC157 can
generate any four of the sixteen different functions of two
variables with one variable common. This is useful for
implementing gating functions.
Truth Table
Inputs
Outputs
E
H
L
S
X
H
H
L
I
I
Z
L
0
1
X
X
X
L
X
L
L
L
H
X
X
H
L
L
L
L
H
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
©1992 Fairchild Semiconductor Corporation
74VHC157 Rev. 1.2
www.fairchildsemi.com
2
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to
estimate propagation delays.
©1992 Fairchild Semiconductor Corporation
74VHC157 Rev. 1.2
www.fairchildsemi.com
3
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
Parameter
Rating
V
Supply Voltage
–0.5V to +7.0V
–0.5V to +7.0V
CC
V
DC Input Voltage
DC Output Voltage
Input Diode Current
Output Diode Current
DC Output Current
IN
V
–0.5V to V + 0.5V
OUT
CC
I
–20mA
20mA
IK
I
OK
I
25mA
OUT
I
DC V / GND Current
50mA
CC
CC
T
Storage Temperature
–65°C to +150°C
260°C
STG
T
Lead Temperature (Soldering, 10 seconds)
L
(1)
Recommended Operating Conditions
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
Parameter
Rating
V
Supply Voltage
2.0V to +5.5V
0V to +5.5V
0V to V
CC
V
Input Voltage
IN
V
Output Voltage
OUT
CC
T
Operating Temperature
Input Rise and Fall Time,
–40°C to +85°C
OPR
t , t
r
f
V
V
= 3.3V 0.3V
= 5.0V 0.5V
0ns/V ∼ 100ns/V
0ns/V ∼ 20ns/V
CC
CC
Note:
1. Unused inputs must be held HIGH or LOW. They may not float.
©1992 Fairchild Semiconductor Corporation
74VHC157 Rev. 1.2
www.fairchildsemi.com
4
DC Electrical Characteristics
T = –40°C to
A
T = 25°C
+85°C
A
Symbol
Parameter
V
(V)
Conditions
Min.
Typ.
Max.
Min.
Max.
Units
CC
2.0
V
HIGH Level Input
Voltage
1.50
1.50
V
IH
3.0–5.5
2.0
0.7 x V
0.7 x V
CC
CC
V
LOW Level Input
Voltage
0.50
0.50
V
V
IL
3.0–5.5
2.0
0.3 x V
0.3 x V
CC
CC
V
HIGH Level
Output Voltage
V
or V
= V
I
= –50µA
1.9
2.9
2.0
3.0
4.5
1.9
2.9
OH
IN
IH
OH
IL
3.0
4.5
4.4
4.4
3.0
I
I
I
= –4mA
= –8mA
= 50µA
2.58
3.94
2.48
3.80
OH
OH
OL
4.5
V
LOW Level
Output Voltage
2.0
V
or V
= V
IH
IL
0.0
0.0
0.0
0.1
0.1
0.1
0.1
V
OL
IN
3.0
4.5
0.1
0.1
3.0
I
I
= 4mA
= 8mA
0.36
0.36
0.1
0.44
0.44
1.0
OL
OL
4.5
I
Input Leakage
Current
0–5.5
V
= 5.5V or GND
µA
µA
IN
IN
I
Quiescent
5.5
V
= V or GND
4.0
40.0
CC
IN
CC
Supply Current
Noise Characteristics
T = 25°C
A
Symbol
Parameter
V
(V)
Conditions
Typ.
Limits
Units
CC
(3)
V
Quiet Output Maximum
Dynamic V
5.0
C = 50pF
0.3
0.8
–0.8
3.5
V
OLP
L
OL
(3)
V
Quiet Output Minimum
Dynamic V
5.0
5.0
5.0
C = 50pF
–0.3
V
V
V
OLV
L
OL
(3)
V
Minimum HIGH Level
Dynamic Input Voltage
C = 50pF
IHD
L
(3)
V
Maximum LOW Level
Dynamic Input Voltage
C = 50pF
1.5
ILD
L
Note:
2. Parameter guaranteed by design.
©1992 Fairchild Semiconductor Corporation
74VHC157 Rev. 1.2
www.fairchildsemi.com
5
AC Electrical Characteristics
T = –40°C
A
T = 25°C
to +85°C
A
V
CC
Symbol
Parameter
(V)
Conditions Min. Typ. Max. Min. Max. Units
t
, t
Propagation Delay,
3.3 0.3 C = 15pF
6.2
8.7
4.1
5.6
8.4
10.9
5.3
6.8
8.7
11.2
5.6
7.1
4
9.7
13.2
6.4
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
11.5
15.0
7.5
ns
ns
ns
ns
ns
ns
PLH PHL
L
I to Z
n
n
C = 50pF
L
5.0 0.5 C = 15pF
L
C = 50pF
8.4
9.5
L
t
t
, t
Propagation Delay,
S to Z
3.3 0.3 C = 15pF
13.2
16.7
8.1
15.5
19.0
9.5
PLH PHL
L
n
C = 50pF
L
5.0 0.5 C = 15pF
L
C = 50pF
10.1
13.6
17.1
8.6
11.5
16.0
19.5
10.0
12.0
10
L
, t
Propagation Delay,
E to Z
3.3 0.3 C = 15pF
PLH PHL
L
n
C = 50pF
L
5.0 0.5 C = 15pF
L
C = 50pF
10.6
10
L
C
Input Capacitance
V
= Open
pF
pF
IN
CC
(3)
C
Power Dissipation
Capacitance
20
PD
Note:
3. C is defined as the value of the internal equivalent capacitance which is calculated from the operating
PD
current consumption without load. Average operating current can be obtained by the equation:
I
(opr.) = C • V • f + I
CC
PD CC IN CC
©1992 Fairchild Semiconductor Corporation
74VHC157 Rev. 1.2
www.fairchildsemi.com
6
Physical Dimensions
Dimensions are in millimeters unless otherwise noted.
Figure 1. 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
Package Number M16A
©1992 Fairchild Semiconductor Corporation
74VHC157 Rev. 1.2
www.fairchildsemi.com
7
Physical Dimensions (Continued)
Dimensions are in millimeters unless otherwise noted.
Figure 2. 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M16D
©1992 Fairchild Semiconductor Corporation
74VHC157 Rev. 1.2
www.fairchildsemi.com
8
Physical Dimensions (Continued)
Dimensions are in millimeters unless otherwise noted.
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 3. 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC16
©1992 Fairchild Semiconductor Corporation
74VHC157 Rev. 1.2
www.fairchildsemi.com
9
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an
exhaustive list of all such trademarks.
ACEx®
i-Lo™
Power-SPM™
PowerTrench®
Programmable Active Droop™
QFET®
TinyBoost™
TinyBuck™
TinyLogic®
TINYOPTO™
TinyPower™
TinyWire™
TruTranslation™
µSerDes™
UHC®
Across the board. Around the world.™
ActiveArray™
Bottomless™
Build it Now™
CoolFET™
CROSSVOLT™
CTL™
Current Transfer Logic™
ImpliedDisconnect™
IntelliMAX™
ISOPLANAR™
MICROCOUPLER™
MicroPak™
MICROWIRE™
Motion-SPM™
MSX™
QS™
QT Optoelectronics™
Quiet Series™
RapidConfigure™
RapidConnect™
ScalarPump™
SMART START™
SPM®
STEALTH™
SuperFET™
SuperSOT™-3
SuperSOT™-6
SuperSOT™-8
SyncFET™
DOME™
UniFET™
VCX™
Wire™
MSXPro™
OCX™
E2CMOS™
EcoSPARK®
EnSigna™
OCXPro™
OPTOLOGIC®
OPTOPLANAR®
PACMAN™
PDP-SPM™
POP™
FACT Quiet Series™
FACT®
FAST®
FASTr™
Power220®
FPS™
FRFET®
Power247®
TCM™
PowerEdge™
PowerSaver™
The Power Franchise®
™
GlobalOptoisolator™
GTO™
HiSeC™
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS
HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE
APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER
ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S
WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR
SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
1. Life support devices or systems are devices or systems 2. A critical component in any component of a life support,
which, (a) are intended for surgical implant into the body or
(b) support or sustain life, and (c) whose failure to perform
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
result in a significant injury of the user.
device, or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Definition
Advance Information
Formative or In Design
This datasheet contains the design specifications for product
development. Specifications may change in any manner without notice.
Preliminary
First Production
Full Production
Not In Production
This datasheet contains preliminary data; supplementary data will be
published at a later date. Fairchild Semiconductor reserves the right to
make changes at any time without notice to improve design.
No Identification Needed
Obsolete
This datasheet contains final specifications. Fairchild Semiconductor
reserves the right to make changes at any time without notice to improve
design.
This datasheet contains specifications on a product that has been
discontinued by Fairchild Semiconductor. The datasheet is printed for
reference information only.
Rev. I26
©1992 Fairchild Semiconductor Corporation
74VHC157 Rev. 1.2
www.fairchildsemi.com
10
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are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent
coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.
ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,
regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or
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application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not
designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification
in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized
application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such
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