74LCX138MTCX datasheet(2/12 Pages) FAIRCHILD

Il numero della parte	74LCX138MTCX

Spiegazioni elettronici	Low Voltage 1-of-8 Decoder/Demultiplexer with 5V Tolerant Inputs

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Produttore elettronici	FAIRCHILD [Fairchild Semiconductor]

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Connection Diagrams

Pin Assignments for SOIC, SOP, and TSSOP

Pad Assignments for DQFN

(Top Through View)

Pin Descriptions

Functional Description

The LCX138 high-speed 1-of-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. The LCX138 can be used as an 8-output demulti-

plexer 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.

Truth Table

H

= HIGH Voltage Level

L

= LOW Voltage Level

X

= Immaterial

Pin Names

Description

A0–A2

Address Inputs

E1–E2

Enable Inputs

E3

Enable Input

O0–O7

Outputs

Inputs

Outputs

E1

E2

E3

A0

A1

A2

O0

O1

O2

O3

O4

O5

O6

O7

H

X

HHH

HH

X

H

X

HHH

HH

X

L

X

HHH

HH

LL

H

LLL

L

H

L

H

L

H

L

H

HHH

HH

L

H

L

H

L

HH

L

HHH

HH

L

HH

H

L

H

L

H

HH

H

L

H

L

H

HHH

H

L

H

L

H

L

H

HHH

HH

L

H

L

H

L

HH

HHH

L

H

L

H

HHH

H

L

Codice articolo simile - 74LCX138MTCX

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ON Semiconductor	74LCX138MTC	513Kb / 14P	Low Voltage 1-of-8 Decoder/Demultiplexer Revised December 2013

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