IN74HC652
FUNCTION TABLE
Dir. OE CAB CBA SAB SBA
A
B
FUNCTION
INPUTS
INPUTS Both the A bus and the B bus are
inputs.
L
H
X
X
X
X
X
X
Z
Z
The output functions of the A and B
bus are disabled.
INPUTS
INPUTS Both the A and B bus are used for
inputs to the internal flip-flops. Data at
the bus will be stored on low to high
transition of the clock inputs.
OUTPUTS INPUTS The A bus are outputs and the B bus
are inputs.
X*
X*
X
X
X
X
L
L
L
H
L
L
H
L
The data at the B bus are displayed
at the A bus.
The data at the B bus are displayed
at the A bus. The data of the B bus
are stored to the internal flip-flops on
low to high transition of the clock
pulse.
The data stored to the internal flip-
flops, are displayed at the A bus.
The data at the B bus are stored to
the internal flip-flops on low to high
transition of the clock pulse. The
states of the internal flip-flops output
directly to the A bus.
L
L
H
H
X*
X*
X
X
H
H
Qn
X
H
L
H
L
INPUTS OUTPUTS The A bus are inputs and the B bus
are outputs.
X
X
X*
X*
L
L
X
X
L
H
L
L
H
L
The data at the A bus are displayed
at the B bus.
The data at the B bus are displayed
at the A bus. The data of the B bus
are stored to the internal flip-flops on
low to high transition of the clock
pulse.
The data stored to the internal flip-
flops are displayed at the B bus.
The data at the A bus are stored to
the internal flip-flops on low to high
transition of the clock pulse. The
states of the internal flip-flops output
directly to the B bus.
H
H
H
H
X*
X*
H
H
X
X
X
Qn
L
L
H
H
OUTPUTS OUTPUTS Both the A bus and the B bus are
outputs
H
L
X
X
H
H
H
H
Qn
Qn
The data stored to the internal flip-
flops are displayed at the A and B bus
respectively.
The output at the A bus are displayed
at the B bus, the output at the B bus
are displayed at the A bus respec.
Qn
Qn
X : DON’T CARE
Z : HIGH IMPEDANCE
Qn : THE DATA STORED TO THE INTERNAL FLIP-FLOPS BY MOST RECENT LOW TO HIGH
TRANSITION OF THE CLOCK INPUTS
* : THE DATA AT THE A AND B BUS WILL BE STORED TO THE INTERNAL FLIP-FLOPS ON EVERY
LOW TO TRANSITION OF THE CLOCK INPUTS
6
INTEGRAL [ INTEGRAL CORP. ]
