Multiplexers | MM74HCT138

3-to-8 Line Decoder

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Overview

The MM74HCT138 decoder utilizes advanced silicon-gate CMOS technology, and are well suited to memory address decoding or data routing applications. Both circuits feature high noise immunity and low power consumption usually associated with CMOS circuitry, yet have speeds comparable to low power Schottky TTL logic.The MM74HCT138 have 3 binary select inputs (A, B, and C). If the device is enabled these inputs determine which one of the eight normally HIGH outputs will go LOW. Two active LOW and one active HIGH enables (G1, G2A and G2B) are provided to ease the cascading decoders.The decoders' output can drive 10 low power Schottky TTL equivalent loads and are functionally and pin equivalent to the 74LS138. All inputs are protected from damage due to static discharge by diodes to VCC and ground.MM74HCT devices are intended to interface between TTL and NMOS components and standard CMOS devices. These parts are also plug-in replacements for LS-TTL devices and can be used to reduce power consumption in existing designs.

  • This product is general usage and suitable for many different applications.

  • TTL input compatible
  • Typical propagation delay: 20 ns
  • Low quiescent current: 80 µA maximum (74HCT Series)
  • Low input current: 1 µA maximum
  • Fanout of 10 LS-TTL loads

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Reference Price

MM74HCT138M

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Active

CAD Model

Pb

A

H

P

SOIC-16

751B-05

1

260

TUBE

48

N

1

4.5

5.5

24

4.8

$0.2323

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MM74HCT138MTC

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Active

CAD Model

Pb

A

H

P

TSSOP-16

948F-01

1

260

TUBE

96

N

1

4.5

5.5

24

4.8

$0.2643

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MM74HCT138MTCX

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Active

CAD Model

Pb

A

H

P

TSSOP-16

948F-01

1

260

REEL

2500

N

1

4.5

5.5

24

4.8

$0.204

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MM74HCT138MX

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Active

CAD Model

Pb

A

H

P

SOIC-16

751BG

1

260

REEL

2500

N

1

4.5

5.5

24

4.8

$0.1797

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MM74HCT138N

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Obsolete

CAD Model

Pb

A

H

P

E-PKG AXIAL-LEADED GLASS DIODE

017AE

NA

-

RAIL

2500

N

1

-

-

24

-

Price N/A

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Reliability Data

Die Related Summary Data

Device: MM74HCT138M

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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