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8-bit compatible shift / store register
BU4094BC / BU4094BCF / BU4094BCFV
The BU4094BC, BU4094BCF, and BU4094BCFV are shift / store registers, each consisting of an 8-bit register and
an 8-bit latch.
As the data in the shift register can be latched by an asynchronous strobe input, it is possible to hold the output in
the data transfer mode.
The tri-state parallel output can be connected directly with an 8-bit bus line.
These registers are suitable for in-line / parallel data conversion, data receivers and other similar applications.
•
Logic circuit diagram
SERIAL
IN
SHIFT REGISTER
CLOCK
STROBE
OUTPUT
ENABLE
Q
1
PARALLEL OUTPUTS
•
Truth table
OUTPUT
CLOCK
STROBE
ENABLE
H
H
H
L
H
L
NC: No Change
Z: High Impedance
8-STAGE
Q
S
Q'
S
SERIAL
OUTPUT
8-BIT
LATCHES
3-STATE
OUTPUTS
Q
8
Parallel output
SERIAL IN
Q
H
L
H
H
L
X
NC
X
X
X
X
NC
X
X
X: Irrelevant
•
Block diagram
Serial output
Q
Q
1
n
S
L
Q
Q
n-1
7
H
Q
Q
n-1
7
NC
Q
7
Z
Z
Q
7
NC
NC
Z
Z
NC
87
1
STROBE
SERIAL
2
IN
3
CLOCK
4
Q
1
5
Q
2
6
Q
3
7
Q
4
8
V
SS
Q'
S
NC
NC
NC
NC
Q
S
Q
S
16
V
DD
OUTPUT
15
ENABLE
14
Q
5
13
Q
6
12
Q
7
11
Q
8
10
Q'
S
9
Q
S
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