74LV257D [NXP]
Quad 2-input multiplexer 3-State; 四2输入多路复用器三态
| 型号： | 74LV257D |
| 厂家： | 
NXP |
| 描述： | Quad 2-input multiplexer 3-State |
| 文件： | 总12页 (文件大小：117K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
74LV257
Quad 2-input multiplexer (3-State)
Product specification
1998 May 20
Supersedes data of 1997 Jun 06
IC24 Data Handbook
Philips
Semiconductors
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
FEATURES
DESCRIPTION
The 74LV257 is a low-voltage Si-gate CMOS device and is pin and
function compatible with 74HC/HCT257.
• Optimized for low voltage applications: 1.0 to 3.6 V
• Accepts TTL input levels between V = 2.7 V and V = 3.6 V
CC
CC
The 74LV257 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 4l ) are
• Typical V
(output ground bounce) < 0.8 V at V = 3.3 V,
OLP
= 25°C
CC
T
amb
0
0
selected when input S is LOW and the data inputs from source 1 (1l
1
• Typical V
(output V undershoot) > 2 V at V = 3.3 V,
OHV
= 25°C
OH
CC
to 4l ) are selected when S in HIGH. Data appears at the outputs (1Y
1
T
amb
to 4Y) in true (non-inverting) from the selected inputs. The 74LV257 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.
• Non-inverting data path
• Output capability: bus driver
• I category: MSI
CC
The logic equations for the outputs are:
1Y = OE × (1l × S + 1l × S)
1
0
2Y = OE × (2l × S + 2l × S)
1
0
3Y = OE × (3l × S + 3l × S)
1
0
4Y = OE × (4l × S + 4l × S)
1
0
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 = 15 pF;
L
V
CC
= 3.3 V
t
/t
ns
10
14
0
1
PHL PLH
C
C
Input capacitance
3.5
30
pF
pF
I
1
Power dissipation capacitance per gate
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
74LV257 N
PKG. DWG. #
SOT38-4
16-Pin Plastic DIL
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
74LV257 N
74LV257 D
74LV257 DB
74LV257 PW
16-Pin Plastic SO
74LV257 D
SOT109-1
SOT338-1
SOT403-1
16-Pin Plastic SSOP Type II
16-Pin Plastic TSSOP Type I
74LV257 DB
74LV257PW DH
PIN CONFIGURATION
PIN DESCRIPTION
PIN
SYMBOL
NUMBER
FUNCTION
1
S
16
15
14
V
CC
1
S
Common data select input
Data inputs from source 0
Data inputs from source 1
2
1I
0
OE
2, 5, 11, 14
3, 6, 10, 13
4, 7, 9, 12
8
1l to 4l
0
0
1
3
4
5
6
1I
1
4l
0
1l to 4l
1
IY
13
12
11
4l
1
1Y to 4Y 3-state multiplexer outputs
2l
4Y
0
1
GND
OE
Ground (0 V)
2l
3l
0
3-State output enable input
(active LOW)
15
16
7
8
10
9
2Y
3l
1
V
CC
Positive supply voltage
GND
3Y
SV00636
2
1998 May 20
853-1985 19420
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
LOGIC SYMBOL
FUNCTIONAL DIAGRAM
2
3
5
6
11 10 14 13
2
3
1I
1I
0
1Y
4
1I 11 2I 2I 3I 3I 4I 4I
1
0
I
0
1
0
1
0
1
5
6
2I
2I
1
S
0
7
9
2Y
3Y
15
1
OE
3–STATE
MULTIPLEXER
OUTPUTS
SELECTOR
11
10
3I
3I
0
1Y 2Y 3Y 4Y
1
4
7
9
12
14
13
4I
4I
0
SV00637
4Y 12
1
LOGIC SYMBOL (IEEE/IEC)
S
1
OE
15
1
G1
SV00639
15
EN
FUNCTION TABLE
2
INPUTS
OUTPUTS
MUX
1
4
7
OE
S
nl
nl
nY
3
0
1
1
H
X
X
X
Z
5
L
L
L
L
H
H
L
X
X
L
L
H
X
X
L
H
L
6
11
10
14
13
9
L
H
H
NOTES:
H
L
X
Z
=
=
=
=
HIGH voltage level
LOW voltage level
don’t care
12
high impedance OFF-state
SV00638
LOGIC DIAGRAM
1I
1
1Y
2Y
3Y
4Y
1I0
2I
1
1
1
2I
0
3I
3I
0
4I
4I
0
OE
S
SV00640
3
1998 May 20
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
CONDITIONS
MIN
1.0
0
TYP
3.3
–
MAX
UNIT
V
CC
DC supply voltage
See Note 1
3.6
V
V
V
V
I
Input voltage
V
CC
V
CC
V
O
Output voltage
0
–
See DC and AC
characteristics
–40
–40
+85
+125
T
amb
Operating ambient temperature range in free air
°C
V
CC
V
CC
V
CC
= 1.0V to 2.0V
= 2.0V to 2.7V
= 2.7V to 3.6V
–
–
–
–
–
–
500
200
100
t , t
r
Input rise and fall times
ns/V
f
NOTE:
1. The LV is guaranteed to function down to V = 1.0V (input levels GND or V ); DC characteristics are guaranteed from V = 1.2V to V =3.6V.
CC
CC
CC
CC
1, 2
ABSOLUTE MAXIMUM RATINGS
In accordance with the Absolute Maximum Rating System (IEC 134).
Voltages are referenced to GND (ground = 0 V).
SYMBOL
PARAMETER
DC supply voltage
CONDITIONS
RATING
–0.5 to +4.6
20
UNIT
V
CC
V
"I
DC input diode current
DC output diode current
V < –0.5 or V > V + 0.5V
mA
mA
IK
I
I
CC
"I
V
O
< –0.5 or V > V + 0.5V
50
OK
O
CC
DC output source or sink current
– bus driver outputs
"I
–0.5V < V < V + 0.5V
35
mA
O
O
CC
DC V or GND current for types with
– bus driver outputs
CC
"I
"I
,
70
mA
GND
CC
T
stg
Storage temperature range
–65 to +150
°C
Power dissipation per package
– plastic DIL
– plastic mini-pack (SO)
for temperature range: –40 to +125°C
above +70°C derate linearly with 12 mW/K
above +70°C derate linearly with 8 mW/K
above +60°C derate linearly with 5.5 mW/K
750
500
400
P
TOT
mW
– plastic shrink mini-pack (SSOP and TSSOP)
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 May 20
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions. Voltages are referenced to GND (ground = 0 V).
LIMITS
MAX
-40°C to +85°C
-40°C to +125°C
SYMBOL
PARAMETER
TEST CONDITIONS
UNIT
V
1
MIN
0.9
1.4
2.0
TYP
MIN
0.9
1.4
2.0
MAX
V
V
V
V
V
V
V
V
V
V
= 1.2 V
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
HIGH level Input
voltage
= 2.0 V
V
IH
= 2.7 to 3.6 V
= 1.2 V
0.3
0.6
0.8
0.3
0.6
0.8
LOW level Input
voltage
= 2.0 V
V
IL
V
= 2.7 to 3.6 V
= 1.2 V; V = V or V –I = 100µA
1.2
2.0
2.7
3.0
I
IH
IL;
O
= 2.0 V; V = V or V –I = 100µA
1.8
2.5
2.8
1.8
2.5
2.8
I
IH
IL;
O
HIGH level output
voltage; all outputs
V
V
V
V
V
V
OH
= 2.7 V; V = V or V –I = 100µA
I
IH
IL;
O
= 3.0 V; V = V or V –I = 100µA
I
IH
IL;
O
HIGH level output
voltage; BUS driver
outputs
V
CC
= 3.0 V; V = V or V –I = 8mA
2.40
2.82
2.20
OH
I
IH
IL;
O
V
CC
V
CC
V
CC
V
CC
= 1.2 V; V = V or V I
IL; O
= 100µA
= 100µA
= 100µA
= 100µA
0
0
0
0
I
IH
= 2.0 V; V = V or V I
IL; O
0.2
0.2
0.2
0.2
0.2
0.2
I
IH
LOW level output
voltage; all outputs
V
V
OL
= 2.7 V; V = V or V I
IL; O
I
IH
= 3.0 V; V = V or V I
IL; O
I
IH
LOW level output
voltage; BUS driver
outputs
V
CC
= 3.0 V; V = V or V I = 8mA
IL; O
0.20
0.40
0.50
OL
I
IH
Input leakage
current
I
V
= 3.6 V; V = V or GND
1.0
5
1.0
10
µA
µA
µA
I
CC
CC
I
CC
3-State output
OFF-state current
V
V
= 3.6 V; V = V or V
I IH IL;
I
OZ
= V or GND
O
CC
Quiescent supply
current; MSI
I
V
CC
= 3.6 V; V = V or GND; I = 0
20.0
160
CC
I
CC
O
Additional
quiescent supply
current per input
∆I
CC
V
CC
= 2.7 V to 3.6 V; V = V – 0.6 V
500
850
µA
I
CC
NOTE:
1. All typical values are measured at T
= 25°C.
amb
5
1998 May 20
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
AC CHARACTERISTICS
GND = 0V; t = t ≤ 2.5ns; C = 50pF; R = 1KΩ
r
f
L
L
LIMITS
–40 to +85 °C
CONDITION
(V)
–40 to +125 °C
SYMBOL
PARAMETER
WAVEFORM
UNIT
1
V
CC
MIN
TYP
65
MAX
MIN
MAX
1.2
2.0
2.7
Propagation delay
nl to nY
nl to nY
22
43
31
25
51
38
30
t
t
Figure 1
ns
0
1
PHL/ PLH
16
2
3.0 to 3.6
1.2
12
85
29
21
2.0
56
41
33
66
49
39
Propagation delay
S to nY
t
t
Figure 1
Figure 2
Figure 2
ns
ns
ns
PHL/ PLH
2.7
2
3.0 to 3.6
1.2
16
60
20
15
2.0
39
29
23
46
34
27
3-State output enable time
OE to nY
t
t
t
PZH/ PZL
2.7
2
3.0 to 3.6
1.2
11
65
24
18
2.0
40
32
26
49
37
30
3-State output disable time
OE to nY
t
PHZ/ PLZ
2.7
2
3.0 to 3.6
14
NOTES:
1. Unless otherwise stated, all typical values are measured at T
= 25°C
amb
2. Typical values are measured at V = 3.3 V.
CC
AC WAVEFORMS
V
V
= 0.5 × V at V < 2.7 V
M
CC CC
V
I
= 1.5 V at V ≥ 2.7 V
M
CC
V = V + 0.3 V at V ≥ 2.7 V
X
OL
CC
OE INPUT
GND
V
M
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
t
PZL
= V – 0.1 × V at V < 2.7 V
t
PLZ
Y
OH
CC
CC
V
CC
and V are the typical output voltage drop that occur with the
OL
OH
OUTPUT
LOW-to-OFF
OFF-to-LOW
output load.
V
M
V
V
X
CC
V
OL
t
PZH
t
PHZ
V
S, nI , nI
M
0
1
INPUTS
V
OH
V
GND
Y
OUTPUT
t
t
V
M
PHL
PLH
HIGH-to-OFF
OFF-to-HIGH
V
OH
GND
outputs
disabled
outputs
enabled
outputs
enabled
V
nY OUTPUT
M
SV00642
V
OL
SV00641
Figure 2. 3-State enable and disable times.
Figure 1. Input (S, nl , nl ) to output (nY) propagation delays.
0
1
6
1998 May 20
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
TEST CIRCUIT
V
CC
V
V
O
I
PULSE
GENERATOR
D.U.T.
50pF
R = 1KΩ
L
R
T
C
L
Test Circuit for switching times
DEFINITIONS
R
T
R
L
= Termination resistance should be equal to Z
= Load resistor
of pulse generators.
OUT
C
= Load capacitance includes jig and probe capacitance
L
TEST
V
V
I
CC
t
t
< 2.7V
V
CC
PLH/ PHL
2.7–3.6V
2.7V
SV00776
Figure 3. Load circuitry for switching times.
7
1998 May 20
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
DIP14: plastic dual in-line package; 14 leads (300 mil)
SOT27-1
8
1998 May 20
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
SO14: plastic small outline package; 14 leads; body width 3.9 mm
SOT108-1
9
1998 May 20
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
SSOP14: plastic shrink small outline package; 14 leads; body width 5.3 mm
SOT337-1
10
1998 May 20
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
TSSOP14: plastic thin shrink small outline package; 14 leads; body width 4.4 mm
SOT402-1
11
1998 May 20
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
DEFINITIONS
Data Sheet Identification
Product Status
Definition
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
Objective Specification
Formative or in Design
This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips
Semiconductors reserves the right to make changes at any time without notice in order to improve design
and supply the best possible product.
Preliminary Specification
Product Specification
Preproduction Product
Full 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.
Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products,
including circuits, 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. Applications that are described herein for any of these products are for illustrative purposes
only. PhilipsSemiconductorsmakesnorepresentationorwarrantythatsuchapplicationswillbesuitableforthespecifiedusewithoutfurthertesting
or modification.
LIFE SUPPORT APPLICATIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
orsystemswheremalfunctionofaPhilipsSemiconductorsandPhilipsElectronicsNorthAmericaCorporationProductcanreasonablybeexpected
to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.
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: 05-96
9397-750-04441
Document order number:
Philips
Semiconductors
相关型号：
74LV257PWDH-T
IC LV/LV-A/LVX/H SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16, Multiplexer/Demultiplexer
NXP
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