參數(shù)資料
型號： SNJ54HCT138FKR
廠商： TEXAS INSTRUMENTS INC
元件分類： 編、解碼器及復(fù)用、解復(fù)用
英文描述： HCT SERIES, OTHER DECODER/DRIVER, INVERTED OUTPUT, CQCC20
封裝： CERAMIC, LCC-20
文件頁數(shù)： 12/19頁
文件大小： 782K
代理商： SNJ54HCT138FKR
SN54HCT138, SN74HCT138
3LINE TO 8LINE DECODERS/DEMULTIPLEXERS
SCLS171E MARCH 1984 REVISED SEPTEMBER 2003
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information (continued)
The conditions at the binary-select inputs and the three enable inputs select one of eight output lines. Two
active-low (G) and one active-high (G) enable inputs reduce the need for external gates or inverters when
expanding. A 24-line decoder can be implemented without external inverters, and a 32-line decoder requires
only one inverter. An enable input can be used as a data input for demultiplexing applications.
FUNCTION TABLE
INPUTS
OUTPUTS
ENABLE
SELECT
OUTPUTS
G1
G2A
G2B
C
B
A
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
X
H
X
H
X
XH
X
XX
H
HH
H
L
XX
X
XX
H
HH
H
LL
L
LL
L
HH
H
LL
L
LH
H
L
H
HH
H
LL
L
HLH
H
L
HH
H
LL
L
HH
H
HH
L
H
HH
H
LL
H
LL
H
HH
H
L
HH
H
LL
H
LH
H
HH
L
H
LL
H
HLH
HH
H
L
H
L
H
L
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