74LCX32652 Datasheet, PDF (3/11 Pages) Fairchild Semiconductor – Low Voltage Transceiver/Register with 5V Tolerant Inputs and Outputs (Preliminary)

Preliminary
Truth Table
(Note 3)
Inputs
OEAB₁ OEBA₁ CPAB₁ CPBA₁
L
L
X
H
L
L
H
H
H
H
X
L
^{H or L}
^{H or L}
^{H or L}
^{H or L}
SAB₁
X
X
X
X
X
X
SBA₁
X
X
X
X
X
X
Inputs/Outputs (Note 4)
1A₀ thru 1A₇
Input
1B₀ thru 1B₇
Input
Input
Input
Not Specified
Output
Not Specified
Output
Input
Input
Operating Mode
Isolation
Store A and B Data
Store A, Hold B
Store A in Both Registers
Hold A, Store B
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 3: Data I/O paths (1A and 1B: 0 - 7) is shown. This also applies to data I/O (1A and 1B: 8 - 15) and #2 control pins, to data (2A and 2B: 0 - 7) and #3
control pins, to data (2A and 2B: 8 - 15) and #4 control pins.
Note 4: 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.
3
www.fairchildsemi.com