Semiconductor Components Industries, LLC, 2012
October, 2012 − Rev. 10
1 Publication Order Number:
MC74LCX138/D
MC74LCX138
Low-Voltage CMOS 3-to-8
Decoder/Demultiplexer
With 5 V−Tolerant Inputs
The MC74LCX138 is a high performance, 3−to−8
decoder/demultiplexer 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
MC74LCX138 inputs to be safely driven from 5 V devices. The
MC74LCX138 is suitable for memory address decoding and other
TTL level bus−oriented applications.
The MC74LCX138 high−speed 3−to−8 decoder/demultiplexer
accepts three binary weighted inputs (A0, A1, A2) and, when enabled,
provides eight mutually exclusive active−LOW outputs (O0
−O7). The
LCX138 features three Enable inputs, two active−LOW (E1
, E2) and
one active−HIGH (E3). All outputs will be HIGH unless E1
and E2 are
LOW, and E3 is HIGH. This multiple enabled function allows easy
parallel expansion of the device to a 1−of−32 (5 lines to 32 lines)
decoder with just four LCX138 devices and one inverter (see
Figure 1). The LCX138 can be used as an 8−output demultiplexer by
using one of the active−LOW Enable inputs as the data input and the
other Enable inputs as strobes. The Enable inputs which are not used
must be permanently tied to their appropriate active−HIGH or
active−LOW state.
Current drive capability is 24 mA at the outputs.
Features
Designed for 2.3 V 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
NLV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
MARKING
DIAGRAMS
A = Assembly Location
WL, L = Wafer Lot
Y = Year
WW, W = Work Week
G or G = Pb−Free Package
SOIC−16
D SUFFIX
CASE 751B
LCX138G
AWLYWW
LCX
138
ALYWG
G
TSSOP−16
DT SUFFIX
CASE 948F
16
16
1
1
16
1
16
1
See detailed ordering and shipping information in the package
dimensions section on page 3 of this data sheet.
ORDERING INFORMATION
http://onsemi.com
(Note: Microdot may be in either location)
