INTEGRATED CIRCUITS
74LV257
Quad 2-input multiplexer (3-State)
Product specification
Supersedes data of 1997 Jun 06
IC24 Data Handbook
1998 May 20
Philips
Semiconductors
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
FEATURES
•
Optimized for low voltage applications: 1.0 to 3.6 V
•
Accepts TTL input levels between V
CC
= 2.7 V and V
CC
= 3.6 V
•
Typical V
OLP
(output ground bounce) < 0.8 V at V
CC
= 3.3 V,
•
Typical V
OHV
(output V
OH
undershoot) > 2 V at V
CC
= 3.3 V,
•
Non-inverting data path
•
Output capability: bus driver
•
I
CC
category: MSI
T
amb
= 25°C
T
amb
= 25°C
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
0
to 4l
0
) are
selected when input S is LOW and the data inputs from source 1 (1l
1
to 4l
1
) 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 is
HIGH.
The logic equations for the outputs are:
1Y = OE
×
(1l
1
×
S + 1l
0
×
S)
2Y = OE
×
(2l
1
×
S + 2l
0
×
S)
3Y = OE
×
(3l
1
×
S + 3l
0
×
S)
4Y = OE
×
(4l
1
×
S + 4l
0
×
S)
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25°C; t
r
= t
f
≤
2.5 ns
SYMBOL
t
PHL
/t
PLH
C
I
C
PD
PARAMETER
Propagation delay
nl
0
, nl
1
to nY
S to nY
Input capacitance
Power dissipation capacitance per gate
V
I
= GND to V
CC1
CONDITIONS
C
L
= 15 pF;
V
CC
= 3.3 V
TYPICAL
10
14
3.5
30
UNIT
ns
pF
pF
NOTE:
1. C
PD
is used to determine the dynamic power dissipation (P
D
in
µW)
P
D
= C
PD
×
V
CC2
×
f
i
)
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz; C
L
= output load capacitance in pF;
f
o
= output frequency in MHz; V
CC
= supply voltage in V;
(C
L
×
V
CC2
×
f
o
) = sum of the outputs.
ORDERING INFORMATION
PACKAGES
16-Pin Plastic DIL
16-Pin Plastic SO
16-Pin Plastic SSOP Type II
16-Pin Plastic TSSOP Type I
TEMPERATURE RANGE
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
OUTSIDE NORTH AMERICA
74LV257 N
74LV257 D
74LV257 DB
74LV257 PW
NORTH AMERICA
74LV257 N
74LV257 D
74LV257 DB
74LV257PW DH
PKG. DWG. #
SOT38-4
SOT109-1
SOT338-1
SOT403-1
PIN CONFIGURATION
S
1I
0
1I
1
IY
2l
0
2l
1
2Y
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
OE
4l
0
4l
1
4Y
3l
0
PIN DESCRIPTION
PIN
NUMBER
1
2, 5, 11, 14
3, 6, 10, 13
4, 7, 9, 12
8
15
3l
1
3Y
SYMBOL
S
1l
0
to 4l
0
1l
1
to 4l
1
1Y to 4Y
GND
OE
V
CC
FUNCTION
Common data select input
Data inputs from source 0
Data inputs from source 1
3-state multiplexer outputs
Ground (0 V)
3-State output enable input
(active LOW)
Positive supply voltage
16
SV00636
1998 May 20
2
853-1985 19420
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
LOGIC SYMBOL
2
3
5
6
11
10 14
13
FUNCTIONAL DIAGRAM
2
1I
0
11
I
2I
0
2I
1
3I
0
3I
1
4I
0
4I
1
1
15
3
5
6
11
10
4
7
9
12
14
1I
0
1I
1
2I
0
2I
1
3I
0
3I
1
4I
0
4I
1
4Y
12
SELECTOR
3–STATE
MULTIPLEXER
OUTPUTS
1Y
4
S
OE
1Y 2Y 3Y 4Y
2Y
7
3Y
9
SV00637
13
LOGIC SYMBOL (IEEE/IEC)
S
1
15
1
G1
EN
OE
15
SV00639
FUNCTION TABLE
2
3
5
7
6
11
9
10
14
12
13
1
1
MUX
4
INPUTS
OE
H
L
L
L
L
S
X
H
H
L
L
nl
0
X
X
X
L
H
nl
1
X
L
H
X
X
OUTPUTS
nY
Z
L
H
L
H
NOTES:
H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
SV00638
LOGIC DIAGRAM
1I
1
1I0
2I
1
2I
0
3I
1
3I
0
4I
1
4I
0
OE
1Y
2Y
3Y
4Y
S
SV00640
1998 May 20
3
Philips Semiconductors
Product specification
Quad 2-input multiplexer (3-State)
74LV257
RECOMMENDED OPERATING CONDITIONS
SYMBOL
V
CC
V
I
V
O
T
amb
PARAMETER
DC supply voltage
Input voltage
Output voltage
Operating ambient temperature range in free air
See DC and AC
characteristics
V
CC
= 1.0V to 2.0V
V
CC
= 2.0V to 2.7V
V
CC
= 2.7V to 3.6V
CONDITIONS
See Note 1
MIN
1.0
0
0
–40
–40
–
–
–
–
–
–
TYP
3.3
–
–
MAX
3.6
V
CC
V
CC
+85
+125
500
200
100
UNIT
V
V
V
°C
t
r
, t
f
Input rise and fall times
ns/V
NOTE:
1. The LV is guaranteed to function down to V
CC
= 1.0V (input levels GND or V
CC
); DC characteristics are guaranteed from V
CC
= 1.2V to V
CC
=3.6V.
ABSOLUTE MAXIMUM RATINGS
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
PARAMETER
DC supply voltage
DC input diode current
DC output diode current
DC output source or sink current
– bus driver outputs
DC V
CC
or GND current for types with
– bus driver outputs
Storage temperature range
Power dissipation per package
– plastic DIL
– plastic mini-pack (SO)
– plastic shrink mini-pack (SSOP and TSSOP)
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
V
I
< –0.5 or V
I
> V
CC
+ 0.5V
V
O
< –0.5 or V
O
> V
CC
+ 0.5V
–0.5V < V
O
< V
CC
+ 0.5V
CONDITIONS
RATING
–0.5 to +4.6
20
50
35
UNIT
V
mA
mA
mA
70
–65 to +150
750
500
400
mA
°C
P
TOT
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
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
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
V
CC
= 1.2 V
V
IH
HIGH l
level I
l Input
t
voltage
V
CC
= 2.0 V
V
CC
= 2.7 to 3.6 V
V
CC
= 1.2 V
V
IL
LOW l
level I
l Input
t
voltage
V
CC
= 2.0 V
V
CC
= 2.7 to 3.6 V
V
CC
= 1.2 V; V
I
= V
IH
or V
IL;
–I
O
= 100µA
V
O
OH
HIGH level output
voltage; all outputs
V
CC
= 2.0 V; V
I
= V
IH
or V
IL;
–I
O
= 100µA
V
CC
= 2.7 V; V
I
= V
IH
or V
IL;
–I
O
= 100µA
V
CC
= 3.0 V; V
I
= V
IH
or V
IL;
–I
O
= 100µA
V
OH
HIGH level output
voltage; BUS driver
outputs
V
CC
= 3.0 V; V
I
= V
IH
or V
IL;
–I
O
= 8mA
V
CC
= 1.2 V; V
I
= V
IH
or V
IL;
I
O
= 100µA
V
O
OL
LOW level output
voltage; all outputs
V
CC
= 2.0 V; V
I
= V
IH
or V
IL;
I
O
= 100µA
V
CC
= 2.7 V; V
I
= V
IH
or V
IL;
I
O
= 100µA
V
CC
= 3.0 V; V
I
= V
IH
or V
IL;
I
O
= 100µA
V
OL
I
I
I
OZ
I
CC
∆I
CC
LOW level output
voltage; BUS driver
outputs
Input leakage
current
3-State output
OFF-state current
Quiescent supply
current; MSI
Additional
quiescent supply
current per input
V
CC
= 3.0 V; V
I
= V
IH
or V
IL;
I
O
= 8mA
V
CC
= 3.6 V; V
I
= V
CC
or GND
V
CC
= 3.6 V; V
I
= V
IH
or V
IL;
V
O
= V
CC
or GND
V
CC
= 3.6 V; V
I
= V
CC
or GND; I
O
= 0
V
CC
= 2.7 V to 3.6 V; V
I
= V
CC
– 0.6 V
1.8
2.5
2.8
2.40
1.2
2.0
2.7
3.0
2.82
0
0
0
0
0.20
0.2
0.2
0.2
0.40
1.0
5
20.0
500
0.2
0.2
0.2
0.50
1.0
10
160
850
V
µA
µA
µA
µA
V
1.8
2.5
2.8
2.20
V
V
0.9
1.4
2.0
0.3
0.6
0.8
-40°C to +85°C
TYP
1
MAX
-40°C to +125°C
MIN
0.9
1.4
2.0
0.3
0.6
0.8
V
V
MAX
UNIT
NOTE:
1. All typical values are measured at T
amb
= 25°C.
1998 May 20
5
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