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CD74HC237PWT 数据表(PDF) 2 Page - Texas Instruments

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部件名 CD74HC237PWT
功能描述  High-Speed CMOS Logic, 3- to 8-Line Decoder/Demultiplexer with Address Latches
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

CD74HC237PWT 数据表(HTML) 2 Page - Texas Instruments

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Pinout
CD54HC237 (CERDIP)
CD74HC137 (PDIP, TSSOP)
CD74HCT137 (PDIP, SOIC)
CD74HC237 (PDIP, SOIC, SOP, TSSOP)
CD74HCT237 (PDIP)
TOP VIEW
Functional Diagram
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
A0
A1
A3
LE
OE1
OE0
GND
Y7
VCC
Y1
Y2
Y3
Y4
Y5
Y6
Y0
15
14
13
12
10
7
9
11
1
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
3
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
237
137
6
2
4
5
A0
A1
A2
LE
OE1
OE0
3-BIT
LATCH
1 OF 8
DECODER
GND = 8
VCC = 16
HC/HCT HC/HCT
’HC137, ’HCT137 TRUTH TABLE
INPUTS
OUTPUTS
LE
OE0
OE1
A2
A1
A0
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
X
X
H
X
X
X
HHHHHHHH
X
L
X
X
X
X
HHHHHHHH
L
H
LLLLL
H
H
H
H
H
H
H
L
H
L
L
L
H
H
L
HHHHHH
L
H
L
L
H
L
HH
L
H
HHHH
L
H
L
L
HHHHH
L
HHHH
L
H
L
H
L
L
HHHH
L
HHH
LHLHLH
H
H
H
H
H
LH
H
L
H
L
H
H
L
HHHHHH
L
H
L
H
L
H
HHHHHHHHH
L
H
H
L
X
X
X
Depends upon the address previously applied while LE was at a logic low.
H = High Voltage Level, L = Low Voltage Level, X = Don’t Care
’HC237, ’HCT237 TRUTH TABLE
INPUTS
OUTPUTS
LE
OE0
OE1
A2
A1
A0
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
X
X
H
X
X
X
LLLLLLLL
X
L
X
X
X
X
LLLLLLLL
L
H
LLLL
H
LLLLLLL
LHL
L
LHLHL
L
L
L
L
L
L
H
LL
H
L
LL
H
L
LLLL
L
H
LL
H
H
LLL
H
LLLL
L
H
L
H
LLLLLL
H
L
LL
LHLHLHL
L
L
L
LHL
L
L
H
L
H
H
L
LLLLLL
H
L
L
H
L
H
H
H
LLLLLLL
H
H
H
L
X
X
X
Depends upon the address previously applied while LE was at a logic low.
H = High Voltage Level, L = Low Voltage Level, X = Don’t Care
CD74HC137, CD74HCT137, CD54HC237, CD74HC237, CD74HCT237


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