74LVC257A [NXP]
Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs 3-State; 四2输入多路复用器与5V兼容输入/输出三态
| 型号： | 74LVC257A |
| 厂家： | 
NXP |
| 描述： | Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs 3-State |
| 文件： | 总10页 (文件大小：100K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
74LVC257A
Quad 2-input multiplexer with 5 Volt
tolerant inputs/outputs (3-State)
Product specification
1998 Jul 29
Superceded data of 1997 Sep 26
IC24 Data Handbook
Philips
Semiconductors
Philips Semiconductors
Product specification
Quad 2-input multiplexer with 5 Volt tolerant
inputs/outputs (3-State)
74LVC257A
FEATURES
• Wide supply voltage range of 1.2 to 3.6 V
DESCRIPTION
The 74LVC257A is a high-performance, low-power, low-voltage,
Si-gate CMOS device and superior to most advanced CMOS
compatible TTL families.
• In accordance with JEDEC standard no. 8-1A
• CMOS lower power consumption
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.
• Direct interface with TTL levels
• Output drive capability 50 W transmission lines at 85°C
• 5 Volt tolerant inputs/outputs, for interfacing with 5 Volt logic
The 74LVC257A is a quad 2-input multiplexer with 3-state outputs,
which select 4 bits of data from two sources and are controlled by a
common data select input (S). The data inputs from source 0 (1l to
0
4l ) are selected when input S is LOW and the data inputs from
0
source 1 (1l to 4l ) are selected when S in HIGH. Data appears at the
1
1
outputs (1Y to 4Y) in true (non-inverting) form from the selected inputs.
The 74LVC257A 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. The outputs are forced to a high impedance
OFF-state when OE is HIGH.
QUICK REFERENCE DATA
GND = 0 V; T
= 25°C; t =t ≤ 2.5 ns
amb
r f
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
Propagation delay
nl , nl to nY
S to nY
C = 50 pF;
L
V
CC
= 3.3 V
t
/t
ns
3.9
3.5
0
1
PHL PLH
C
C
Input capacitance
5.0
30
pF
pF
I
1
Power dissipation capacitance per channel
V = GND to V
I CC
PD
NOTE:
1. C is used to determine the dynamic power dissipation (P in µW)
PD
D
2
2
P
= C × V
× f )ȍ (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
ȍ (C × V
× f ) = sum of the outputs.
L
CC
o
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE OUTSIDE NORTH AMERICA
NORTH AMERICA
74LVC257A 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
74LVC257A D
74LVC257A DB
74LVC257A PW
16-Pin Plastic SSOP Type II
16-Pin Plastic TSSOP Type I
74LVC257A DB
74LVC257APW DH
PIN CONFIGURATION
LOGIC SYMBOL
2
3
5
6
11 10 14 13
1
S
16
15
V
CC
2
1I
0
OE
1I 11 2I 2I 3I 3I 4I 4I
0
I
0
1
0
1
0
1
3
4
5
6
14
13
12
11
1I
4l
0
1
IY
4l
1
1
S
15
OE
2l
4Y
0
1
2l
3l
0
1Y 2Y 3Y 4Y
7
8
10
9
2Y
3l
1
4
7
9
12
GND
3Y
SV00637
SV00636
2
1998 Jul 29
853-2101 19802
Philips Semiconductors
Product specification
Quad 2-input multiplexer with 5 Volt tolerant
inputs/outputs (3-State)
74LVC257A
PIN DESCRIPTION
FUNCTION TABLE
PIN
SYMBOL
NUMBER
FUNCTION
INPUTS
OUTPUTS
OE
H
L
S
X
H
H
L
nl
nl
nY
Z
0
1
1
S
Common data select input
Data inputs from source 0
Data outputs from source 1
X
X
X
L
X
L
2, 5, 11, 14
3, 6, 10, 13
4, 7, 9, 12
8
1l to 4l
0
0
1
1l to 4l
L
1
1Y to 4Y 3-State multiplexer outputs
L
H
X
X
H
L
GND
OE
Ground (0 V)
L
3-State output enable input (active
LOW)
L
L
H
H
15
16
NOTES:
V
CC
Positive supply voltage
H
L
X
Z
=
=
=
=
HIGH voltage level
LOW voltage level
don’t care
LOGIC SYMBOL (IEEE/IEC)
high impedance OFF-state
1
G1
LOGIC DIAGRAM
15
EN
1I
1
1Y
2Y
3Y
4Y
2
1I0
MUX
1
4
7
3
1
2I
1
1
1
5
2I
0
6
3I
3I
11
10
14
13
9
0
4I
4I
12
0
OE
S
SV00638
FUNCTIONAL DIAGRAM
SV00640
2
3
1I
1I
0
1Y
4
1
5
6
2I
2I
0
7
9
2Y
3Y
1
3–STATE
MULTIPLEXER
OUTPUTS
SELECTOR
11
10
3I
3I
0
1
14
13
4I
4I
0
4Y 12
1
S
1
OE
15
SV00639
3
1998 Jul 29
Philips Semiconductors
Product specification
Quad 2-input multiplexer with 5 Volt tolerant
inputs/outputs (3-State)
74LVC257A
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
DC input voltage range; output HIGH or LOW state
DC output voltage range; output 3-State
Operating free-air temperature range
0
V
CC
V
O
0
5.5
T
amb
–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
IK
I
DC input diode current
V t 0
mA
V
I
V
I
DC input voltage
Note 2
–0.5 to +5.5
"50
I
DC output diode current
V
O
uV or V t 0
mA
OK
CC
O
DC output voltage; output HIGH or LOW
DC output voltage; output 3-State
DC output source or sink current
Note 2
Note 2
–0.5 to V +0.5
CC
V
V
O
–0.5 to 6.5
"50
I
O
V
O
= 0 to V
CC
mA
mA
°C
I
, I
DC V or GND current
"100
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 with 5 Volt tolerant
inputs/outputs (3-State)
74LVC257A
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
V
V
V
V
V
V
V
V
V
V
= 1.2V
V
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
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
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
I
IH
IL
O
= 3.0V; V = V or V ; I = 100µA
GND
V
OL
I
IH
IL
O
= 3.0V; V = V or V
I = 24mA
IL; O
I
IH
"0.1
0.1
I
Input leakage current
V
CC
V
CC
V
CC
V
CC
= 3.6V; V = 5.5V or GND
µA
µA
µA
µA
I
I
I
3-State output OFF-state current
Power off leakage current
Quiescent supply current
= 3.6V; V = V or V ; V = V or GND
I IH IL O CC
"5
"10
10
OZ
I
= 0.0V; V or V = 5.5V
0.1
OFF
I
O
I
= 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
NOTES:
1. All typical values are at V = 3.3V and T
= 25°C.
CC
amb
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
1
MIN
TYP
MAX
MIN
TYP
MAX
TYP
Propagation delay
nl to nY
nl to nY
1
t
t
/t
Figures 1, 3
1.5
3.9
5.1
1.5
3.3
6.1
11
ns
0
PHL PLH
Propagation delay
S to nY
/t
Figures 1, 3
Figures 2, 3
Figures 2, 3
1.5
1.5
1.5
3.5
3.7
3.2
6.4
6.5
5.2
1.5
1.5
1.5
4.3
4.6
3.5
7.5
7.5
6.2
14
15
12
ns
ns
ns
PHL PLH
3-state output enable time
OE to nY
t
t
t
PZH/ PZL
3-state output disable time
OE to nY
t
PHZ/ PLZ
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 with 5 Volt tolerant
inputs/outputs (3-State)
74LVC257A
AC WAVEFORMS
TEST CIRCUIT
V
V
= 0.5 × V at V < 2.7 V
M
CC CC
S
1
2 x V
Open
CC
= 1.5 V at V ≥ 2.7 V
V
M
CC
CC
V = V + 0.3 V at V ≥ 2.7 V
X
OL
CC
GND
V = V + 0.1 × V at V < 2.7 V
X
OL
CC
CC
500Ω
500Ω
V
V
O
I
V
V
V
= V – 0.3 V at V ≥ 2.7V
OH CC
PULSE
GENERATOR
Y
D.U.T.
= V – 0.1 × V at V < 2.7 V
Y
OH
CC
CC
50pF
and V are the typical output voltage drop that occur with the
C
OL
OH
L
R
T
output load.
V
CC
Test
/t
S
1
V
S, nI , nI
INPUTS
M
0
1
V
V
CC
I
t
Open
PLH PHL
t 2.7V
2.7V – 3.6V
V
t
/t
2 x V
CC
CC
PLZ PZL
GND
2.7V
t
/t
GND
PHZ PZH
t
t
PLH
PHL
SY00003
V
OH
Figure 3. Load circuitry for switching times.
V
nY OUTPUT
M
V
OL
SV00641
Figure 1. Input (S, nl , nl ) to output (nY) propagation delays.
0
1
V
I
OE INPUT
GND
V
M
t
t
PZL
PLZ
V
CC
OUTPUT
LOW-to-OFF
OFF-to-LOW
V
M
V
X
V
OL
t
PZH
t
PHZ
V
OH
V
Y
OUTPUT
V
HIGH-to-OFF
OFF-to-HIGH
M
GND
outputs
disabled
outputs
enabled
outputs
enabled
SV00642
Figure 2. 3-state enable and disable times.
6
1998 Jul 29
Philips Semiconductors
Product specification
Quad 2-input multiplexer with 5 Volt tolerant
inputs/outputs (3-State)
74LVC257A
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 with 5 Volt tolerant
inputs/outputs (3-State)
74LVC257A
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 with 5 Volt tolerant
inputs/outputs (3-State)
74LVC257A
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 with 5 Volt tolerant
inputs/outputs (3-State)
74LVC257A
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
9397-750-04504
Document order number:
Philips
Semiconductors
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