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74HC155 数据表(PDF) 2 Page - STMicroelectronics

部件名 74HC155
功能描述  DUAL 2 TO 4 LINE DECODER 3 TO 8 LINE DECODER
Download  11 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

74HC155 数据表(HTML) 2 Page - STMicroelectronics

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INPUT AND OUTPUT EQUIVALENT CIRCUIT
IEC LOGIC SYMBOL
PIN DESCRIPTION
PIN No
SYMBOL
NAME AND FUNCTION
1, 15
1C, 2C
Data Inputs
2, 14
1G, 2G
Strobe Inputs
3, 13
B, A
Common Data Inputs
7, 6, 5, 4
1Y0 to 1Y3
Outputs
9, 10, 11, 12 2Y0 to 2Y3
Outputs
8
GND
Ground (0V)
16
VCC
Positive Supply Voltage
TRUTH TABLE
INPUTS
OUTPUTS
B
A
2G
2C
2Y0
2Y1
2Y2
2Y3
X
X
HX
H
HHH
L
L
L
L
L
HHH
LH
L
L
H
L
H
H
HLL
L
H
H
L
H
HHL
LHH
H
L
X
X
X
H
H
HHH
TRUTH TABLE
INPUTS
OUTPUTS
B
A
1G
1C
1Y0
1Y1
1Y2
1Y3
XXH
X
H
H
H
H
LL
L
H
L
H
H
H
L
HLH
H
L
H
H
HL
LH
H
H
L
H
HH
L
HHH
H
L
XXX
L
H
H
H
H
M54/M74HC155
2/11


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