參數(shù)資料
型號: CD74HCT138MT
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, PDSO16
封裝: GREEN, PLASTIC, MS-012AC, SOIC-16
文件頁數(shù): 12/19頁
文件大?。?/td> 604K
代理商: CD74HCT138MT
2
Pinout
CD54HC138, CD54HCT138, CD54HC238, CD54HCT238
(CERDIP)
CD74HC138, CD74HCT138, CD74HCT238
(PDIP, SOIC)
CD74HC238
(PDIP, SOIC, SOP, TSSOP)
TOP VIEW
Signal names in parentheses are for ’HC138 and ’HCT138.
Functional Diagram
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
A0
A1
A2
E1
E2
E3
GND
(Y7) Y7
VCC
Y1 (Y1)
Y2 (Y2)
Y3 (Y3)
Y4 (Y4)
Y5 (Y5)
Y6 (Y6)
Y0 (Y0)
15
14
13
12
10
7
9
11
1
2
3
5
6
4
E3
E2
E1
A2
A1
A0
Y0
Y7
Y6
Y5
Y4
Y3
Y2
Y1
Y0
Y7
Y6
Y5
Y4
Y3
Y2
Y1
HC/HCT
238
HC/HCT
138
TRUTH TABLE ’HC138, ’HCT138
INPUTS
OUTPUTS
ENABLE
ADDRESS
E3
E2
E1
A2
A1
A0
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
X
H
X
HHHHHHHH
L
X
HHHHHHHH
X
H
X
HHHHHHHH
H
L
LLLLL
H
L
H
L
HHHHHH
H
L
H
L
HH
L
H
HHHH
H
L
HHHHH
L
HHHH
H
L
H
L
HHHH
L
HHH
H
L
H
L
HHHHHH
L
H
L
H
L
HHHHHH
L
H
L
H
HHHHHHHHH
L
H = High Voltage Level, L = Low Voltage Level, X = Don’t Care
TRUTH TABLE ’HC238, ’HCT238
INPUTS
OUTPUTS
ENABLE
ADDRESS
E3
E2
E1
A2
A1
A0
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
X
H
X
LLLLLLLL
L
X
LLLLLLLL
X
H
X
LLLLLLLL
H
L
LLLL
H
LLLLLLL
H
L
LLL
H
L
H
LLLLLL
H
L
LL
H
L
LL
H
L
LLLL
H
L
LL
H
LLL
H
LLLL
H
L
H
LLLLLL
H
L
LL
HL
LHLHL
L
LHL
L
H
L
H
L
LLLLLL
H
L
H
L
H
LLLLLLL
H
H = High Voltage Level, L = Low Voltage Level, X = Don’t Care
CD54/74HC138, CD54/74HCT138, CD54/74HC238, CD54/74HCT238
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