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Manufacturer Part #


74LCX Series 2.3 to 3.6 V SMT CMOS 3-to-8 Decoder / Demultiplexer - TSSOP-16

ECAD Model:
Mfr. Name: onsemi
Standard Pkg:
Product Variant Information section
Date Code: 2314
Product Specification Section
onsemi MC74LCX138DTR2G - Technical Attributes
Attributes Table
Logic Circuit: Decoder/Demux
Family: VCX/LCX
No of Functions / Channels: 1
Supply Voltage-Nom: 2V to 3.6V
Package Style:  TSSOP-16
Mounting Method: Surface Mount
Features & Applications
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.


  • Designed for 2.3 V to 3.6 V VCC 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 µA) Substantially Reduces System Power Requirements
  • Latchup Performance Exceeds 500 mA
  • ESD Performance
    • Human Body Model >2000 V
    • Machine Model >200 V
Pricing Section
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6 Weeks
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Product Variant Information section