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74LCX652 Datasheet(PDF) 2 Page - Fairchild Semiconductor

Part No. 74LCX652
Description  Low Voltage Transceiver/Register with 5V Tolerant Inputs and Outputs
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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74LCX652 Datasheet(HTML) 2 Page - Fairchild Semiconductor

 
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Logic Symbols
IEEE/IEC
Truth Table
(Note 2)
H
= HIGH Voltage Level
L
= LOW Voltage Level
X
= Immaterial
 = LOW-to-HIGH Clock Transition
Note 2: The data output functions may be enabled or disabled by various signals at OEAB or OEBA inputs. Data input functions are always enabled, i.e.,
data at the bus pins will be stored on every LOW-to-HIGH transition on the clock inputs.
Inputs
Inputs/Outputs
Operating Mode
OEAB
OEBA
CPAB
CPBA
SAB
SBA
A0 thru A7
B0 thru B7
L
H
H or L
H or L
X
X
Input
Input
Isolation
LH

X
X
Store A and B Data
XH

H or L
X
X
Input
Not Specified
Store A, Hold B
HH

X
X
Input
Output
Store A in Both Registers
LX
H or L

X
X
Not Specified
Input
Hold A, Store B
LL

X
X
Output
Input
Store B in Both Registers
L
L
X
X
X
L
Output
Input
Real-Time B Data to A Bus
L
L
X
H or L
X
H
Store B Data to A Bus
H
H
X
X
L
X
Input
Output
Real-Time A Data to B Bus
H
H
H or L
X
H
X
Stored A Data to B Bus
H
L
H or L
H or L
H
H
Output
Output
Stored A Data to B Bus and
Stored B Data to A Bus


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