74ac651 IK Semicon Co., Ltd, 74ac651 Datasheet - Page 6

• Manufacturer Part Number: 74ac651
• Description: Octal 3-state Bus Transceivers And D Flip-flops
• Manufacturer: IK Semicon Co., Ltd

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
*
TO TRANSITION OF THE CLOCK INPUTS
: THE DATA AT THE A AND B BUS WILL BE STORED TO THE INTERNAL FLIP-FLOPS ON EVERY LOW
Dir.
H
H
L
L
OE
H
L
H
L
CAB CBA SAB SBA
X
X
X
X
X
X
X
X
*
*
*
*
X
X
X
X
X
X
X
X
*
*
*
*
X
X
X
X
X
X
H
H
H
H
L
L
X
X
H
H
X
X
X
X
H
H
L
L
FUNCTION TABLE
OUTPUTS
OUTPUTS
INPUTS
INPUTS
INPUTS
Qn
Qn
Qn
A
Z
H
L
H
L
L
H
H
L
H
L
X
H
L
OUTPUTS The A bus are inputs and the B bus are
OUTPUTS Both the A bus and the B bus are outputs
INPUTS
INPUTS
INPUTS
Qn
Qn
Qn
H
H
X
H
H
H
H
B
Z
L
L
L
L
L
L
Both the A bus and the B bus are inputs.
The output functions of the A and B bus
are disabled.
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.
The A bus are outputs and the B bus are
inputs.
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.
outputs.
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.
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.
FUNCTION
IN74AC651
Rev. 00