SN74LS137D データシートの表示（PDF） - Motorola => Freescale

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SN74LS137D

3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS WITH ADDRESS LATCHES

Motorola => Freescale 

SN54 / 74LS137

FUNCTION TABLE

INPUTS

ENABLE

SELECT

OUTPUTS

GL G1 G2 C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7

X X HXXXH H H H H H H H

X L XXXXH H H H H H H H

L H LLLL L HHHHHHH

L H L LLHH L H H H H H H

L H L LHL H H L H H H H H

L H L LHH H H H L H H H H

L H LHLL H H H H L H H H

L H LHLHH H H H H L H H

L H L HHL H H H H H H L H

L H L HHH H H H H H H H L

H H L XXX

H = high level, L = low level, X = irrelevant

Output corresponding to stored

address, L; all others, H

(1)

A

SELECT

INPUTS

(2)

B

(3)

C

(4)

GL

ENABLE

INPUTS

(5)

G2

(6)

G1

(15)

Y0

(14)

Y1

(13)

Y2

(12)

Y3

(11)

Y4

DATA

OUTPUTS

(10)

Y5

(9)

Y6

(7)

Y7

FAST AND LS TTL DATA

5-226

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