74LCX16652_01 Datasheet, PDF (2/10 Pages) Fairchild Semiconductor – Low Voltage Transceiver/Register with 5V Tolerant Inputs and Outputs

Connection Diagram
Truth Table
(Note 2)
Inputs
OEAB OEBA₁ CPAB₁ CPBA₁ SAB₁ SBA₁
Inputs/Outputs
A₀ thru A₇
B₀ thru B₇
Operating Mode
L
L
X
H
L
L
H
H
H
H
X
L
H or L H or L
 _{H or L}
  _{H or L}
X
X
X
X
X
X
X
Input
Input
Isolation
X
Store A and B Data
X
Input
Not Specified Store A, Hold B
X
Input
Output
Store A in Both Registers
X
Not Specified
Input
Hold A, Store B
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
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. This also applies to data I/O (A and B: 8–15) and #2 control pins.
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