© 2001 Fairchild Semiconductor Corporation DS012465 www.fairchildsemi.com
May 1995
Revised February 2001
7
4
LCX157
Low V
o
lt
age
Quad 2-
Input

Mul
t
i
p
lex
e
r w
i
th 5V T
o
l
e
ra
nt Input
s
74LCX157
Low Voltage Quad 2-Input Multiplexer
with 5V Tolerant Inputs
General Description
The LCX157 is a high-speed quad 2-input multiplexer. Four
bits of data from two sources can be selected using the
common Select and Enable inputs. The four outputs
present the selected data in the true (noninverted) form.
The LCX157 can also be used as a function generator.
The 74LCX157 is fabricated with advanced CMOS technol-
ogy to achieve high speed operation while maintaining
CMOS low power dissipation.
Features
a73 5V tolerant inputs
a73 2.3V–3.6V V
CC
specifications provided
a73 5.8 ns t
PD
max (V
CC
= 3.3V), 10 µA I
CC
max
a73 Power down high impedance inputs and outputs
a73 ±24 mA output drive (V
CC
= 3.0V)
a73 Implements patented noise/EMI reduction circuitry
a73 Latch-up performance exceeds 500 mA
a73 ESD performance:
Human body model > 2000V
Machine model > 200V

Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
IEEE/IEC
Connection Diagram
Pin Descriptions
Order Number Package Number Package Description
74LCX157M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
74LCX157SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LCX157MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pin Names Description
I
0a
–I
0d
Source 0 Data Inputs
I
1a
–I
1d
Source 1 Data Inputs
E Enable Input
S Select Input
Z
a
–Z
d
Outputs