Page 1
INTEGRATED CIRCUITS
74LV257
Quad 2-input multiplexer (3-State)
Product specification
Supersedes data of 1997 Jun 06
IC24 Data Handbook
1998 May 20
Page 2
Philips Semiconductors Product specification
74L V257Quad 2-input multiplexer (3-State)
FEA TURES
•Optimized for low voltage applications: 1.0 to 3.6 V
•Accepts TTL input levels between V
•Typical V
T
amb
•Typical V
T
amb
(output ground bounce) < 0.8 V at V
OLP
= 25°C
(output VOH undershoot) > 2 V at V
OHV
= 25°C
= 2.7 V and V
CC
CC
CC
CC
= 3.3 V,
= 3.3 V,
•Non-inverting data path
•Output capability: bus driver
•I
category: MSI
CC
QUICK REFERENCE DATA
GND = 0 V; T
= 25°C; tr = t
amb
SYMBOL
Propagation delay
t
PHL/tPLH
C
I
C
PD
nl0, nl1 to nY
S to nY
Input capacitance 3.5 pF
Power dissipation capacitance per gate VI = GND to V
NOTE:
1. C
is used to determine the dynamic power dissipation (PD in µW)
PD
= CPD × V
P
D
f
= input frequency in MHz; CL = output load capacitance in pF;
i
= output frequency in MHz; VCC = supply voltage in V;
f
o
(C
× V
L
2
× fi (CL × V
CC
2
× fo) = sum of the outputs.
CC
≤ 2.5 ns
f
PARAMETER CONDITIONS TYPICAL UNIT
2
× fo) where:
CC
= 3.6 V
CL = 15 pF;
VCC = 3.3 V
DESCRIPTION
The 74LV257 is a low-voltage Si-gate CMOS device and is pin and
function compatible with 74HC/HCT257.
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
selected when input S is LOW and the data inputs from source 1 (1l
to 4l1) are selected when S in HIGH. Data appears at the outputs (1Y
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
HIGH.
The logic equations for the outputs are:
1Y = OE
2Y = OE
3Y = OE
4Y = OE
× (1l1 × S + 1l0 × S)
× (2l1 × S + 2l0 × S)
× (3l1 × S + 3l0 × S)
× (4l1 × S + 4l0 × S)
10
14
CC
1
30 pF
to 4l0) are
0
ns
1
is
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA PKG. DWG. #
16-Pin Plastic DIL –40°C to +125°C 74LV257 N 74LV257 N SOT38-4
16-Pin Plastic SO –40°C to +125°C 74LV257 D 74LV257 D SOT109-1
16-Pin Plastic SSOP Type II –40°C to +125°C 74LV257 DB 74LV257 DB SOT338-1
16-Pin Plastic TSSOP Type I –40°C to +125°C 74LV257 PW 74LV257PW DH SOT403-1
PIN CONFIGURATION
1
S
2
1I
0
3
1I
1
4
IY
5
2l
0
6
2l
1
7
2Y
8
GND
1998 May 20 853-1985 19420
16
15
14
13
12
11
10
9
SV00636
V
OE
4l
4l
4Y
3l
3l
3Y
CC
0
1
0
1
PIN DESCRIPTION
PIN
NUMBER
1 S Common data select input
2, 5, 11, 14 1l0 to 4l0Data inputs from source 0
3, 6, 10, 13 1l1 to 4l1Data inputs from source 1
4, 7, 9, 12 1Y to 4Y 3-state multiplexer outputs
8 GND Ground (0 V)
15 OE
16 V
2
SYMBOL FUNCTION
3-State output enable input
(active LOW)
CC
Positive supply voltage
Page 3
Philips Semiconductors Product specification
74LV257Quad 2-input multiplexer (3-State)
LOGIC SYMBOL
2
35
1I
2I
11I2I
0
0
1
15
S
OE
1Y
4
LOGIC SYMBOL (IEEE/IEC)
1
15
2
3
5
6
11
10
14
13
G1
EN
MUX
1
1
FUNCTIONAL DIAGRAM
6
10
1411
13
2
1I
0
3I
4I
3I14I
0
1
2Y
3Y
7
0
1
4Y
12
9
SV00637
3
1I
1
5
2I
0
6
2I
1
11
3I
10
3I
14
4I
13
4I
SELECTOR
0
1
0
1
S
115
3–STATE
MULTIPLEXER
OUTPUTS
OE
1Y
2Y
3Y
4Y
SV00639
4
7
9
12
FUNCTION TABLE
INPUTS OUTPUTS
0
nl
1
nY
12
SV00638
4
OE S nl
H X X X Z
7
L H X L L
L H X H H
L L L X L
9
L L H X H
NOTES:
H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
LOGIC DIAGRAM
1I
1
1I0
2I
1
2I
0
3I
1
3I
0
4I
1
4I
0
OE
S
1998 May 20
1Y
2Y
3Y
4Y
SV00640
3
Page 4
Philips Semiconductors Product specification
74LV257Quad 2-input multiplexer (3-State)
RECOMMENDED OPERATING CONDITIONS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT
T
V
V
V
amb
tr, t
DC supply voltage See Note 1 1.0 3.3 3.6 V
CC
Input voltage 0 – V
I
Output voltage 0 – V
O
Operating ambient temperature range in free air
Input rise and fall times
f
See DC and AC
characteristics
VCC = 1.0V to 2.0V
VCC = 2.0V to 2.7V
VCC = 2.7V to 3.6V
–40
–40
–
–
–
–
–
–
CC
CC
+85
+125
500
200
100
V
V
°C
ns/V
NOTE:
1. The LV is guaranteed to function down to V
ABSOLUTE MAXIMUM RATINGS
= 1.0V (input levels GND or VCC); DC characteristics are guaranteed from VCC = 1.2V to VCC =3.6V.
CC
1, 2
In accordance with the Absolute Maximum Rating System (IEC 134).
Voltages are referenced to GND (ground = 0 V).
SYMBOL
V
CC
I
IK
I
OK
I
O
I
GND
I
CC
T
stg
P
TOT
DC supply voltage –0.5 to +4.6 V
DC input diode current VI < –0.5 or VI > VCC + 0.5V 20 mA
DC output diode current VO < –0.5 or VO > VCC + 0.5V 50 mA
DC output source or sink current
– bus driver outputs
DC VCC or GND current for types with
,
– bus driver outputs
Storage temperature range –65 to +150 °C
Power dissipation per package
– plastic DIL
– plastic mini-pack (SO)
– plastic shrink mini-pack (SSOP and TSSOP)
PARAMETER CONDITIONS RATING UNIT
–0.5V < VO < VCC + 0.5V 35 mA
70 mA
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
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.
1998 May 20
4
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Philips Semiconductors Product specification
voltage
voltage
V
V
V
V
74LV257Quad 2-input multiplexer (3-State)
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions. V oltages are referenced to GND (ground = 0 V).
LIMITS
SYMBOL P ARAMETER TEST CONDITIONS
VCC = 1.2 V 0.9 0.9
IH
HIGH level Input
V
VCC = 2.0 V 1.4 1.4
VCC = 2.7 to 3.6 V 2.0 2.0
VCC = 1.2 V 0.3 0.3
IL
LOW level Input
V
VCC = 2.0 V 0.6 0.6
VCC = 2.7 to 3.6 V 0.8 0.8
HIGH level output
OH
voltage; all outputs
VCC = 1.2 V; VI = VIH or V
VCC = 2.0 V; VI = VIH or V
VCC = 2.7 V; VI = VIH or V
VCC = 3.0 V; VI = VIH or V
IL;
IL;
IL;
IL;
HIGH level output
V
voltage; BUS driver
OH
outputs
LOW level output
OL
voltage; all outputs
VCC = 3.0 V; VI = VIH or V
VCC = 1.2 V; VI = VIH or V
VCC = 2.0 V; VI = VIH or V
VCC = 2.7 V; VI = VIH or V
VCC = 3.0 V; VI = VIH or V
IL;
IL;
IL;
IL;
IL;
LOW level output
V
I
I
voltage; BUS driver
OL
outputs
Input leakage
I
I
current
3-State output
OZ
OFF-state current
Quiescent supply
CC
current; MSI
VCC = 3.0 V; VI = VIH or V
IL;
VCC = 3.6 V; VI = VCC or GND 1.0 1.0 µA
VCC = 3.6 V; VI = VIH or V
VO = VCC or GND
IL;
VCC = 3.6 V; VI = VCC or GND; IO = 0 20.0 160 µA
Additional
CC
quiescent supply
current per input
VCC = 2.7 V to 3.6 V; VI = VCC – 0.6 V 500 850 µA
∆I
NOTE:
1. All typical values are measured at T
amb
= 25°C.
–IO = 100µA 1.2
–IO = 100µA 1.8 2.0 1.8
–IO = 100µA 2.5 2.7 2.5
–IO = 100µA 2.8 3.0 2.8
–IO = 8mA 2.40 2.82 2.20 V
IO = 100µA 0
IO = 100µA 0 0.2 0.2
IO = 100µA 0 0.2 0.2
IO = 100µA 0 0.2 0.2
IO = 8mA 0.20 0.40 0.50 V
-40°C to +85°C -40°C to +125°C
MIN TYP
1
MAX MIN MAX
5 10 µA
UNIT
V
V
1998 May 20
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Philips Semiconductors Product specification
CONDITION
t
nl
nY
Figure 1
ns
t
gy
Figure 1
ns
t
Figure 2
ns
t
Figure 2
ns
74LV257Quad 2-input multiplexer (3-State)
AC CHARACTERISTICS
GND = 0V; tr = tf ≤ 2.5ns; CL = 50pF; RL = 1KΩ
LIMITS
SYMBOL PARAMETER WAVEFORM
Propagation delay
to
PHL/tPLH
PHL/tPLH
PZH/tPZL
PHZ/tPLZ
0
nl1 to nY
Propagation delay
S to nY
3-State output enable time
OE to nY
3-State output disable time
OE to nY
NOTES:
1. Unless otherwise stated, all typical values are measured at T
2. Typical values are measured at V
= 3.3 V.
CC
VCC(V) MIN TYP1MAX MIN MAX
1.2 65
2.0 22 43 51
2.7 16 31 38
3.0 to 3.6 12
1.2 85
2.0 29 56 66
2.7 21 41 49
3.0 to 3.6 16
1.2 60
2.0 20 39 46
2.7 15 29 34
3.0 to 3.6 11
1.2 65
2.0 24 40 49
2.7 18 32 37
3.0 to 3.6 14
= 25°C
amb
–40 to +85 °C –40 to +125 °C
2
25 30
2
33 39
2
23 27
2
26 30
UNIT
AC WAVEFORMS
V
INPUTS
GND
V
at VCC < 2.7 V
CC
CC
CC
1
t
PHL
OH
V
OL
at V
CC
< 2.7 V
V
M
V
t
PLH
M
SV00641
VM = 0.5 × V
= 1.5 V at VCC ≥ 2.7 V
V
M
V
= VOL + 0.3 V at VCC ≥ 2.7 V
X
V
= VOL + 0.1 ×V
X
= VOH – 0.3 V at VCC ≥ 2.7V
V
Y
V
= VOH – 0.1 × VCC at VCC < 2.7 V
Y
and VOH are the typical output voltage drop that occur with the
V
OL
output load.
S, nI0, nI
nY OUTPUT
Figure 1. Input (S, nl0, nl1) to output (nY) propagation delays.
V
I
OE INPUT
GND
V
OUTPUT
LOW-to-OFF
OFF-to-LOW
V
V
OUTPUT
HIGH-to-OFF
OFF-to-HIGH
GND
CC
OL
OH
V
outputs
enabled
M
t
PLZ
V
X
t
PHZ
V
Y
Figure 2. 3-State enable and disable times.
outputs
disabled
t
PZL
t
PZH
V
M
V
M
outputs
enabled
SV00642
1998 May 20
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Philips Semiconductors Product specification
74LV257Quad 2-input multiplexer (3-State)
TEST CIRCUIT
V
CC
PULSE
GENERATOR
V
I
D.U.T.
R
T
V
O
C
Test Circuit for switching times
DEFINITIONS
RT = Termination resistance should be equal to Z
= Load resistor
R
L
= Load capacitance includes jig and probe capacitance
C
L
TEST
t
PLH/tPHL
V
CC
< 2.7V V
Figure 3. Load circuitry for switching times.
50pF
L
of pulse generators.
OUT
V
I
CC
2.7V2.7–3.6V
RL= 1KΩ
SV00776
1998 May 20
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Page 8
Philips Semiconductors Product specification
74LV257Quad 2-input multiplexer (3-State)
DIP14: plastic dual in-line package; 14 leads (300 mil) SOT27-1
1998 May 20
8
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Philips Semiconductors Product specification
74LV257Quad 2-input multiplexer (3-State)
SO14: plastic small outline package; 14 leads; body width 3.9 mm SOT108-1
1998 May 20
9
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Philips Semiconductors Product specification
74LV257Quad 2-input multiplexer (3-State)
SSOP14: plastic shrink small outline package; 14 leads; body width 5.3 mm SOT337-1
1998 May 20
10
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Philips Semiconductors Product specification
74LV257Quad 2-input multiplexer (3-State)
TSSOP14: plastic thin shrink small outline package; 14 leads; body width 4.4 mm SOT402-1
1998 May 20
11
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Philips Semiconductors Product specification
74LV257Quad 2-input multiplexer (3-State)
DEFINITIONS
Data Sheet Identification Product Status Definition
Objective Specification
Preliminary Specification
Product Specification
Formative or in Design
Preproduction Product
Full Production
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. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing
or modification.
LIFE SUPPORT APPLICA TIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected
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
Sunnyvale, California 94088–3409
Telephone 800-234-7381
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
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.
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.
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
print code Date of release: 05-96
Document order number: 9397-750-04441
1998 May 20
12
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