74LVC157AD [NXP]
Quad 2-input multiplexer; 四2输入多路复用器
| 型号： | 74LVC157AD |
| 厂家： | 
NXP |
| 描述： | Quad 2-input multiplexer |
| 文件： | 总10页 (文件大小：97K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
74LVC157A
Quad 2-input multiplexer
Product specification
1998 Jul 29
Supercedes data of 1997 Nov 07
IC24 Data Handbook
Philips
Semiconductors
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
input (S). The four outputs present the selected data in the true
(non-inverted) form. The enable input (E) is active LOW. When E is
HIGH, all of the outputs (1Y to 4Y) are forced LOW regardless of all
other input conditions. Moving the data from two groups of registers
to four common output buses is a common use of the 74LV157. The
state of the common data select input (S) determines the particular
register from which the data comes. It can also be used as function
generator.
FEATURES
• Wide supply voltage range of 1.2 to 3.6 V
• In accordance with JEDEC standard no. 8-1A
• CMOS lower power consumption
• Direct interface with TTL levels
• 5 Volt tolerant inputs, for interfacing with 5 Volt logic
The device is useful for implementing highly irregular logic by
generating any four of the 16 different functions of two variables with
one variable common.
DESCRIPTION
The 74LVC157A is a high-performance, low-power, Si-gate CMOS
device, superior to most advanced CMOS compatible TTL families.
The 74LVC157A is the logic implementation of a 4-pole, 2-position
switch, where the position of the switch is determined by the logic
levels applied to S.
Inputs can be driven from either 3.3V or 5.0V devices. In 3-State
operation, outputs can handle 5V. This feature allows the use of
these devices as translators in a mixed 3.3V/5V environment.
The 74LVC157A is a quad 2-input multiplexer which select 4 bits of
data from two sources under the control of a common data select
QUICK REFERENCE DATA
GND = 0 V; T
= 25°C; t = t ≤ 2.5 ns
amb
r f
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
Propagation delay
3.1
3.0
3.3
nl , nl1, to nY
C = 50 pF;
0
L
t
/t
ns
PHL PLH
E to nY
S to nY
V
CC
= 3.3 V
C
Input capacitance
5.0
33
pF
pF
I
1
C
Power dissipation capacitance per gate
V = GND to V
I CC
PD
NOTES:
1. C is used to determine the dynamic power dissipation (P in µW)
PD
D
2
2
P
= C × V
× f )Σ (C × V
× f ) where:
D
PD
CC
i
L
CC o
f = input frequency in MHz; C = output load capacitance in pF;
i
L
f = output frequency in MHz; V = supply voltage in V;
o
CC
2
Σ (C × V
× f ) = sum of the outputs.
L
CC
o
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE OUTSIDE NORTH AMERICA
NORTH AMERICA
74LVC157A D
PKG. DWG. #
SOT109-1
SOT338-1
SOT403-1
16-Pin Plastic SO
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
74LVC157A D
74LVC157A DB
74LVC157A PW
16-Pin Plastic SSOP Type II
16-Pin Plastic TSSOP Type I
74LVC157A DB
74LVC157APW DH
PIN CONFIGURATION
PIN DESCRIPTION
PIN
NUMBER
SYMBOL
FUNCTION
S
1
16
V
CC
2
1I
1I
15
14
E
1
S
Common data select input
Data inputs from sources 0
Data inputs from sources 1
Multiplexer outputs
0
1
2, 5, 11, 14
1l to 4l
0
3
4
5
6
0
1
4I
0
1
3, 6, 10, 13
1l to 4l
1
1Y
13 4I
4, 7, 9, 12
1Y to 4Y
GND
E
2I
12
11
4Y
0
1
8
Ground (0 V)
2I
3I
3I
0
1
15
16
Enable input (active LOW)
Positive supply voltage
2Y
7
8
10
9
V
CC
GND
3Y
SV00563
2
1998 Jul 29
853-1945 19802
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
LOGIC SYMBOL
FUNCTIONAL DIAGRAM
2
3
5
6
11
3I
10
3I
14
4I
13
4I
2
3
1I
1I
0
1
1Y
4
1I
1I
2I
2I
1
0
1
0
0
1
0
1
5
6
2I
2I
0
1
1
S
E
7
9
2Y
3Y
15
MULTIPLEXER
OUTPUTS
SELECTOR
11
10
3I
3I
0
1
1Y
4
2Y
7
3Y
9
4Y
12
14
13
4I
4I
0
1
4Y
12
SV00564
S
1
E
LOGIC SYMBOL (IEEE/IEC)
15
1
G1
SV00566
15
EN
FUNCTION TABLE
INPUTS
OUTPUTS
2
MUX
1
4
E
S
nl
nl
nY
0
1
3
1
H
X
X
X
L
5
L
L
L
L
L
L
H
H
L
H
X
X
X
X
L
L
H
L
7
9
6
H
H
11
10
14
13
NOTES:
H = HIGH voltage level
L
X
=
=
LOW voltage level
don’t care
12
LOGIC DIAGRAM
SV00565
S
E
1I
1
1Y
2Y
3Y
1I
0
2I
1
1
1
2I
0
3I
3I
0
4I
4Y
4I
0
SV00581
3
1998 Jul 29
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
PARAMETER
CONDITIONS
UNIT
MAX
MIN
2.7
1.2
0
DC supply voltage (for max. speed performance)
DC supply voltage (for low-voltage applications)
DC input voltage range
3.6
V
CC
V
3.6
V
I
5.5
V
V
V
O
DC output voltage range
0
V
CC
T
amb
Operating free-air temperature range
–40
+85
°C
V
CC
V
CC
= 1.2 to 2.7V
= 2.7 to 3.6V
0
0
20
10
t , t
r
Input rise and fall times
ns/V
f
1
ABSOLUTE MAXIMUM RATINGS
In accordance with the Absolute Maximum Rating System (IEC 134).
Voltages are referenced to GND (ground = 0V).
SYMBOL
PARAMETER
DC supply voltage
CONDITIONS
RATING
–0.5 to +6.5
–50
UNIT
V
V
CC
I
IK
DC input diode current
DC input voltage
V t 0
mA
V
I
V
I
Note 2
–0.5 to +5.5
"50
I
DC output diode current
DC output voltage
V
O
uV or V t 0
mA
V
OK
CC
O
V
O
Note 2
= 0 to V
CC
–0.5 to V +0.5
CC
I
O
DC output diode current
V
O
"50
"100
mA
mA
°C
I
, I
DC V or GND current
GND CC
CC
T
stg
Storage temperature range
–65 to +150
Power dissipation per package
– plastic mini-pack (SO)
– plastic shrink mini-pack (SSOP and TSSOP)
P
TOT
above +70°C derate linearly with 8 mW/K
above +60°C derate linearly with 5.5 mW/K
500
500
mW
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
4
1998 Jul 29
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions. Voltages are referenced to GND (ground = 0V).
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
Temp = -40°C to +85°C
UNIT
1
MIN
TYP
MAX
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 1.2V
V
CC
V
HIGH level Input voltage
LOW level Input voltage
V
V
IH
= 2.7 to 3.6V
= 1.2V
2.0
GND
0.8
V
IL
= 2.7 to 3.6V
= 2.7V; V = V or V ; I = –12mA
V
V
V
V
*0.5
I
IH
IL
O
CC
CC
CC
CC
= 3.0V; V = V or V ; I = –100µA
*0.2
*0.6
*0.8
V
CC
I
IH
IL
O
V
OH
HIGH level output voltage
LOW level output voltage
V
= 3.0V; V = V or V I
= –18mA
I = –24mA
I
IH
IL; O
= 3.0V; V = V or V
IL; O
I
IH
= 2.7V; V = V or V ; I = 12mA
0.40
0.20
0.55
"5
10
I
IH
IL
O
= 3.0V; V = V or V ; I = 100µA
GND
V
OL
V
I
IH
IL
O
= 3.0V; V = V or V
I = 24mA
IL; O
I
IH
I
Input leakage current
= 3.6V; V = 5.5V or GND
"0.1
µA
µA
I
I
I
Quiescent supply current
= 3.6V; V = V or GND; I = 0
0.1
CC
I
CC
O
Additional quiescent supply current per
input pin
∆I
CC
V
CC
= 2.7V to 3.6V; V = V –0.6V; I = 0
5
500
µA
I
CC
O
NOTE:
1. All typical values are measured at V = 3.3V and T
= 25°C.
amb
CC
AC CHARACTERISTICS
GND = 0 V; t = t v 2.5 ns; C = 50 pF; R = 500W; T
= –40_C to +85_C
r
f
L
L
amb
LIMITS
SYMBOL
PARAMETER
WAVEFORM
V
CC
= 3.3V ±0.3V
V
CC
= 2.7V
V = 1.2V
CC
UNIT
1
MIN
TYP
MAX
MIN
MAX
TYP
Propagation delay
nl to nY;
0
t
/t
Figure 2, 3
1.5
3.1
5.7
1.5
6.7
12
ns
PHL PLH
nl to nY
1
Propagation delay
E to nY
t
t
/t
Figure 1, 3
Figure 2, 3
1.5
1.5
3.0
3.3
6.3
6.8
1.5
1.5
7.3
7.8
11
13
ns
ns
PHL PLH
Propagation delay
S to nY
/t
PHL PLH
NOTE:
1. These typical values are at V = 3.3V and T
= 25°C.
amb
CC
5
1998 Jul 29
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
AC WAVEFORMS
TEST CIRCUIT
V
V
= 0.5 × V at V < 2.7 V
M
CC CC
S
1
= 1.5 V at V ≥ 2.7 V
M
CC
2 * V
CC
V
CC
V = V + 0.3 V at V ≥ 2.7 V
X
OL
CC
Open
GND
V = V + 0.1 × V at V < 2.7 V
X
OL
CC
CC
V
V
V
= V – 0.3 V at V ≥ 2.7V
OH CC
Y
500Ω
= V – 0.1 × V at V < 2.7 V
V
V
O
Y
OH
CC
CC
I
and V are the typical output voltage drop that occur with the
PULSE
GENERATOR
OL
OH
D.U.T.
output load.
50pF
500Ω
R
T
C
L
V
I
E INPUT
GND
V
M
SWITCH POSITION
TEST
S
V
V
I
t
t
1
CC
PHL
PLH
V
OH
t
t
Open
< 2.7V
2.7–3.6V
V
CC
PLH/ PHL
nY OUTPUTS
V
2.7V
M
V
OL
SV00903
SV00561
Figure 3. Load circuitry for switching times.
Figure 1. Enable input (E) to output (nY) propagation delays.
V
I
nI , nI , S
INPUTS
V
0
1
M
GND
t
t
PLH
PHL
V
OH
nY OUTPUT
V
M
V
OL
SV00562
Figure 2. Data inputs (nI , nI ) and common data select
0
1
input (S) to output (nY) propagation delays.
6
1998 Jul 29
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
7
1998 Jul 29
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm
SOT338-1
8
1998 Jul 29
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
SOT403-1
9
1998 Jul 29
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
Data sheet status
[1]
Data sheet
status
Product
status
Definition
Objective
specification
Development
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
Preliminary
specification
Qualification
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.
Product
specification
Production
This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Righttomakechanges—PhilipsSemiconductorsreservestherighttomakechanges, withoutnotice, intheproducts, includingcircuits,standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
Sunnyvale, California 94088–3409
Telephone 800-234-7381
print code
Date of release: 08-98
9297-750-04495
Document order number:
Philips
Semiconductors
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