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MC74LCX157
Low−Voltage CMOS Quad
2−Input Multiplexer
With 5 V−Tolerant Inputs
(Non−Inverting)
http://onsemi.com
The MC74LCX157 is a high performance, quad 2−input
multiplexer operating from a 2.3 to 3.6 V supply. High impedance
TTL compatible inputs significantly reduce current loading to input
drivers while TTL compatible outputs offer improved switching noise
performance. A V
I
specification of 5.5 V allows MC74LCX157 inputs
to be safely driven from 5 V devices.
Four bits of data from two sources can be selected using the Select
and Enable inputs. The four outputs present the selected data in the
true (non−inverted) form. The MC74LCX157 can also be used as a
function generator. Current drive capability is 24 mA at the outputs.
Features
MARKING
DIAGRAMS
16
SOIC−16
D SUFFIX
CASE 751B
1
16
LCX157
AWLYWW
16
1
•
•
•
•
•
•
Designed for 2.3 to 3.6 V V
CC
Operation
5 V Tolerant Inputs − Interface Capability With 5 V TTL Logic
LVTTL Compatible
LVCMOS Compatible
24 mA Balanced Output Sink and Source Capability
Near Zero Static Supply Current (10
mA)
Substantially Reduces
System Power Requirements
•
Latchup Performance Exceeds 500 mA
•
ESD Performance:
Human Body Model >2000 V
Machine Model >200 V
•
Pb−Free Packages are Available*
16
1
TSSOP−16
DT SUFFIX
CASE 948F
LCX
157
ALYW
1
16
SOEIAJ−16
M SUFFIX
CASE 966
1
1
A
L, WL
Y
W, WW
=
=
=
=
Assembly Location
Wafer Lot
Year
Work Week
74LCX157
ALYW
16
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 3 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
©
Semiconductor Components Industries, LLC, 2005
1
January, 2005 − Rev. 4
Publication Order Number:
MC74LCX157/D
MC74LCX157
V
CC
16
E
15
I0c
14
I1c
13
Zc
12
I0d
11
I1d
10
Zd
9
PIN NAMES
Pins
I0n
I1n
E
S
Zn
Function
Source 0 Data Inputs
Source 1 Data Inputs
Enable Input
Select Input
Outputs
1
S
2
I0a
3
I1a
4
Za
5
I0b
6
I1b
7
Zb
8
GND
Figure 1. 16−Lead Pinout
(Top View)
S
E
I0a
I1a
I0b
I1b
I0c
I1c
I0d
I1d
1
15
2
3
4
Za
5
6
7
Zb
14
13
12
Zc
11
10
9
Zd
Figure 2. Logic Diagram
TRUTH TABLE
Inputs
E
H
L
L
L
L
S
X
H
H
L
L
I0n
X
X
X
L
H
I1n
X
L
H
X
X
Outputs
Zn
L
L
H
L
H
H = High Voltage Level; L = Low Voltage Level; X = High or Low Voltage Level ; For I
CC
Reasons DO
NOT FLOAT Inputs
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2
MC74LCX157
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
I
V
O
I
IK
I
OK
DC Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
Parameter
Value
−0.5 to +7.0
−0.5
≤
V
I
≤
+7.0
−0.5
≤
V
O
≤
V
CC
+ 0.5
−50
−50
+50
I
O
I
CC
I
GND
T
STG
DC Output Source/Sink Current
DC Supply Current Per Supply Pin
DC Ground Current Per Ground Pin
Storage Temperature Range
±50
±100
±100
−65 to +150
Note 1
V
I
< GND
V
O
< GND
V
O
> V
CC
Condition
Unit
V
V
V
mA
mA
mA
mA
mA
mA
°C
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
1. Output in HIGH or LOW State. I
O
absolute maximum rating must be observed.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
I
V
O
I
OH
I
OL
I
OH
I
OL
T
A
Dt/DV
Supply Voltage
Input Voltage
Output Voltage
(HIGH or LOW State)
Parameter
Operating
Data Retention Only
Min
2.0
1.5
0
0
Typ
3.3
3.3
Max
3.6
3.6
5.5
V
CC
−24
24
−12
12
−40
0
+85
10
Unit
V
V
V
mA
mA
mA
mA
°C
ns/V
HIGH Level Output Current, V
CC
= 3.0 V − 3.6 V
LOW Level Output Current, V
CC
= 3.0 V − 3.6 V
HIGH Level Output Current, V
CC
= 2.7 V − 3.0 V
LOW Level Output Current, V
CC
= 2.7 V − 3.0 V
Operating Free−Air Temperature
Input Transition Rise or Fall Rate, V
IN
from 0.8 V to 2.0 V,
V
CC
= 3.0 V
ORDERING INFORMATION
Device
MC74LCX157DR2
MC74LCX157DR2G
MC74LCX157DT
MC74LCX157DTR2
Package
SOIC−16
SOIC−16
(Pb−Free)
TSSOP−16*
TSSOP−16*
Shipping
†
2500 Tape & Reel
2500 Tape & Reel
96 Units / Rail
2500 Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*This package is inherently Pb−Free.
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3
MC74LCX157
DC ELECTRICAL CHARACTERISTICS
T
A
= −40°C to +85°C
Symbol
V
IH
V
IL
V
OH
Characteristic
HIGH Level Input Voltage (Note 2)
LOW Level Input Voltage (Note 2)
HIGH Level Output Voltage
Condition
2.7 V
≤
V
CC
≤
3.6 V
2.7 V
≤
V
CC
≤
3.6 V
2.7 V
≤
V
CC
≤
3.6 V; I
OH
= −100
mA
V
CC
= 2.7 V; I
OH
= −12 mA
V
CC
= 3.0 V; I
OH
= −18 mA
V
CC
= 3.0 V; I
OH
= −24 mA
V
OL
LOW Level Output Voltage
2.7 V
≤
V
CC
≤
3.6 V; I
OL
= 100
mA
V
CC
= 2.7 V; I
OL
= 12 mA
V
CC
= 3.0 V; I
OL
= 16 mA
V
CC
= 3.0 V; I
OL
= 24 mA
I
I
I
CC
DI
CC
Input Leakage Current
Quiescent Supply Current
2.7 V
≤
V
CC
≤
3.6 V; 0 V
≤
V
I
≤
5.5 V
2.7
≤
V
CC
≤
3.6 V; V
I
= GND or V
CC
2.7
≤
V
CC
≤
3.6 V; 3.6
≤
V
I
≤
5.5 V
Increase in I
CC
per Input
2.7
≤
V
CC
≤
3.6 V; V
IH
= V
CC
− 0.6 V
2. These values of V
I
are used to test DC electrical characteristics only.
V
CC
− 0.2
2.2
2.4
2.2
0.2
0.4
0.4
0.55
±5.0
10
±10
500
mA
mA
mA
mA
V
Min
2.0
0.8
Max
Unit
V
V
V
AC CHARACTERISTICS
(t
R
= t
F
= 2.5 ns; C
L
= 50 pF; R
L
= 500
W)
Limits
T
A
= −40°C to +85°C
V
CC
= 3.0 V to 3.6 V
Symbol
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
OSHL
t
OSLH
Parameter
Propagation Delay
In to Zn
Propagation Delay
S to Zn
Propagation Delay
E to Zn
Output−to−Output Skew
(Note 3)
Waveform
1
1,2
2
Min
1.5
1.5
1.5
1.5
1.5
1.5
Max
5.8
5.8
7.0
7.0
7.0
7.0
1.0
1.0
V
CC
= 2.7 V
Max
6.3
6.3
8.0
8.0
8.0
8.0
Unit
ns
ns
ns
ns
3. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH−to−LOW (t
OSHL
) or LOW−to−HIGH (t
OSLH
); parameter
guaranteed by design.
DYNAMIC SWITCHING CHARACTERISTICS
T
A
= +25°C
Symbol
V
OLP
V
OLV
Characteristic
Dynamic LOW Peak Voltage (Note 4)
Dynamic LOW Valley Voltage (Note 4)
Condition
V
CC
= 3.3 V, C
L
= 50 pF, V
IH
= 3.3 V, V
IL
= 0 V
V
CC
= 3.3 V, C
L
= 50 pF, V
IH
= 3.3 V, V
IL
= 0 V
Min
Typ
0.8
0.8
Max
Unit
V
V
4. Number of outputs defined as “n”. Measured with “n−1” outputs switching from HIGH−to−LOW or LOW−to−HIGH. The remaining output is
measured in the LOW state.
CAPACITIVE CHARACTERISTICS
Symbol
C
IN
C
OUT
C
PD
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
Parameter
Condition
V
CC
= 3.3 V, V
I
= 0 V or V
CC
V
CC
= 3.3 V, V
I
= 0 V or V
CC
10 MHz, V
CC
= 3.3 V, V
I
= 0 V or V
CC
Typical
7
8
25
Unit
pF
pF
pF
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