Datasheet

CY74FCT16652T
CY74FCT162652T
3
Function Table
[1]
Inputs Data I/O
[2]
Operation or FunctionOEAB OEBA CLKAB CLKBA SAB SBA A B
L
L
H
H
H or L H or L X
X
X
X
Input Input Isolation
Store A and B Data
X
H
H
H
H or L X
X
[3]
X
X
Input
Input
Unspecified
[2]
Output
Store A, Hold B
Store A in Both Registers
L
L
X
L
H or L X
X
X
X
[3]
Unspecified
[2]
Input
Input
Hold A, Store B
Store B in both Registers
L
L
L
L
X
X
X
H or L
X
X
L
H
Output Input Real Time B Data to A Bus
Stored B Data to A Bus
H
H
H
H
X
H or L
X
X
L
H
X
X
Input Output Real Time A Data to B Bus
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
Notes:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
=LOW-to-HIGH Transition
2. The data output functions may be enabled or disabled by various signals at the 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. Select control=L; clocks can occur simultaneously.
Select control=H; clocks must be staggered to load both registers.