tc74vcx16646ft TOSHIBA Semiconductor CORPORATION, tc74vcx16646ft Datasheet - Page 3

• Manufacturer Part Number: tc74vcx16646ft
• Description: Low-voltage 16-bit Bus Transceiver/register With 3.6-v Tolerant Inputs And Outputs
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Truth Table
X: Don’t care
Z: High impedance
Q
*: The clocks are not internally with either OE or DIR.
n
OE
: The data stored into the internal flip-flops by most recent low to high transition of the clock inputs.
H
L
L
Therefore, data on the A and/or B busses may be clocked into the storage flip-flops at any time.
DIR
X
H
L
CAB
Control Inputs
X *
X *
X *
X *
X *
X *
X *
CBA
X *
X *
X *
X *
X *
X *
X *
SAB
X
X
H
H
X
X
X
X
L
L
SBA
X
X
X
X
X
X
H
H
L
L
3
Output
Input
Input
Qn
A
X
H
H
X
H
H
H
H
Z
L
L
L
L
L
L
Bus
Output
Input
Input
Qn
B
X
H
H
H
H
H
X
H
Z
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 flop-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.
TC74VCX16646FT
Function
2007-10-19