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74F652SC Fiches technique(PDF) 2 Page - Fairchild Semiconductor

No de pièce 74F652SC
Description  Transceivers/Registers
Download  8 Pages
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Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

74F652SC Fiches technique(HTML) 2 Page - Fairchild Semiconductor

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2
Unit Loading/Fan Out
Function Table
H
= HIGH Voltage Level
X
= Immaterial
L
= LOW Voltage Level
 = 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.
Pin Names
Description
U.L.
Input IIH/IIL
HIGH/LOW
Output IOH/IOL
A0–A7, B0–B7
A and B Inputs/
1.0/1.0
20
µA/−0.6 mA
3-STATE Outputs
600/106.6 (80)
−12 mA/64 mA (48 mA)
CPAB, CPBA
Clock Inputs
1.0/1.0
20
µA/−0.6 mA
SAB, SBA
Select Inputs
1.0/1.0
20
µA/−0.6 mA
OEAB, OEBA
Output Enable Inputs
1.0/1.0
20
µA/−0.6 mA
Inputs
Inputs/Outputs (Note 2)
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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