Product Overview

Product Overview
MC74LCX138: Low Voltage CMOS 3-to-8 Decoder/Demultiplexer
For complete documentation, see the data sheet
Product Description
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 VI 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.
Features
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Designed for 2.3 V to 3.6 V VCC Operation
5V Tolerant Inputs - Interface Capability With 5V TTL Logic
LVTTL Compatible
LVCMOS Compatible
24mA Balanced Output Sink and Source Capability
Near Zero Static Supply Current (10<FONT FACE=SYMBOL>m</font>A) Substantially Reduces System Power Requirements
Latchup Performance Exceeds 500mA
ESD Performance: Human Body Model >2000V;
Machine Model >200V
• Pb-Free Packages are Available*
Part Electrical Specifications
Product
MC74LCX138DR2G
Compliance
Status
Channels
VCC Min (V)
VCC Max (V)
tpd Max (ns)
IO Max (mA)
Package Type
Pb-free
Active
1
2
3.6
6
24
SOIC-16
Active
1
2
3.6
6
24
TSSOP-16
Active
1
2
3.6
6
24
TSSOP-16
Active
1
2
3.6
6
24
SOIC-16
Halide free
MC74LCX138DTG
Pb-free
Halide free
MC74LCX138DTR2G
Pb-free
Halide free
NLV74LCX138DR2G
AEC
Qualified
PPAP
Capable
Pb-free
Halide free
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016