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Multiplexers | MC74LCX138

Low Voltage CMOS 3-to-8 Decoder/Demultiplexer

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Overview

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
  • 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 (10mA) Substantially Reduces System Power Requirements
  • Latchup Performance Exceeds 500mA
  • ESD Performance: Human Body Model >2000V;
    Machine Model >200V
  • Pb-Free Packages are Available*

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MC74LCX138DR2G

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Active

CAD Model

Pb

A

H

P

SOIC-16

751B-05

1

260

REEL

2500

N

1

2

3.6

6

null

$0.2371

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MC74LCX138DTG

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CAD Model

Pb

A

H

P

TSSOP-16

948F-01

1

260

TUBE

96

N

1

2

3.6

6

null

$0.2464

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MC74LCX138DTR2G

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Active

CAD Model

Pb

A

H

P

TSSOP-16

948F-01

1

260

REEL

2500

N

1

2

3.6

6

null

$0.2464

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NLV74LCX138DR2G

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CAD Model

Pb

A

H

P

SOIC-16

751B-05

1

260

REEL

2500

N

1

2

3.6

6

null

Price N/A

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Reliability Data

Die Related Summary Data

Device: MC74LCX138DR2G

Equivalent to wafer fab process: CMOS SUB

Product Technology

Product Technology

Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

CMOS SUB

2

920154574

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Re-calculate Data

Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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