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M74HC85-1 Datasheet(PDF) 2 Page - STMicroelectronics

Part # M74HC85-1
Description  4-BIT MAGNITUDE COMPARATOR
Download  10 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HC85-1 Datasheet(HTML) 2 Page - STMicroelectronics

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M74HC85
2/10
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
X : Don’t Care
PIN No
SYMBOL
NAME AND FUNCTION
2
INA<B
A<B Expansion Input
3
INA=B
A=B Expansion Input
4
INA>B
A>B Expansion Input
5
OUTA>B
A>B Expansion Output
6
OUTA=B
A=B Expansion Output
7
OUTA<B
A<B Expansion Output
9, 11, 14, 1
B0 to B3
Word B Inputs
10, 12, 13,
15
A0 to A3
Word A Inputs
8
GND
Ground (0V)
16
Vcc
Positive Supply Voltage
COMPARING INPUTS
CASCADING INPUTS
OUTPUTS
A>B
A<B
A=B
A>B
A<B
A=B
A3 > B3
X
X
X
X
X
X
H
L
L
A3 = B3
A2 > B2
X
X
X
X
X
H
L
L
A3 = B3
A2 = B2
A1 > B1
X
X
X
X
H
L
L
A3 = B3
A2 = B2
A1 = B1
A0 > B0
X
X
X
H
L
L
A3 = B3
A2 = B2
A1 = B1
A0 = B0
LLL
H
H
L
X
X
HL
LH
LHL
LHL
HL
LHL
L
H
H
LLLL
A3 = B3
A2 = B2
A1 = B1
A0 < B0
X
X
X
L
H
L
A3 = B3
A2 = B2
A1 > B1
X
X
X
X
L
H
L
A3 = B3
A2 < B2
X
X
X
X
X
L
H
L
A3 < B3
X
X
X
X
X
X
L
H
L


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