tc74hct652ap TOSHIBA Semiconductor CORPORATION, tc74hct652ap Datasheet - Page 3

• Manufacturer Part Number: tc74hct652ap
• Description: Octal Bus Transceiver/register
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Truth Table
X: Don’t care
Qn: The data stored into the internal flip-flops by most recent low to high transition of the clock inputs.
Z: High impedance
Note:
GAB
H
H
L
L
GBA
H
H
The clock are not internally gated with either GAB or GBA . Therefore, data on the A and/or B busses may
be clocked into the storage flip-flops at any time.
L
L
CAB
(Note)
(Note)
(Note)
(Note)
(Note)
(Note)
(Note)
(Note)
X
X
X
X
X
X
X
X
CBA
(Note)
(Note)
(Note)
(Note)
(Note)
(Note)
(Note)
(Note)
X
X
X
X
X
X
X
X
SAB
X
X
H
H
X
X
X
X
H
L
L
SBA
X
X
X
X
X
X
H
H
H
L
L
Outputs
Outputs
Inputs
Inputs
Qn
Qn
A
X
H
H
X
H
H
H
H
Z
L
L
L
L
L
L
3
Outputs
Outputs
Inputs
Inputs
Qn
Qn
H
H
H
H
H
H
B
Z
X
X
L
L
L
L
L
L
The output functions of A and B busses are
disabled.
Both A and B busses are used as inputs to the
internal flip-flops. Data on the bus will be stored
on the rising edge of the clock.
The data on the A bus are displayed on the B bus.
The data on the A bus are displayed on the B bus,
and are stored into the A storage flip-flops on the
rising edge of CAB.
The data in the A storage flip-flops are displayed
on the B bus.
The data on the A bus are stored into the A
storage flip-flops on the rising edge of CAB, and
the stored data propagate directly onto the B bus.
The data on the B bus are displayed on the A bus.
The data on the B bus are displayed on the A bus,
and are stored into the B storage flip-flops on the
rising edge of CBA.
The data in the B storage flip-flops are displayed
on the A bus.
The data on the B bus are stored into the B
storage flip-flops on the rising edge of CBA, and
the stored data propagate directly onto the A bus.
The data stored to the internal flip-flops are
displayed at the A and B bus respectively.
Function
TC74HCT652AP
2007-10-01