Standard ICs
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.
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Logic circuit diagram
SERIAL
IN
CLOCK
8-STAGE
SHIFT REGISTER
Q
S
Q'
S
SERIAL
OUTPUT
8-BIT
LATCHES
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Block diagram
STROBE
SERIAL
IN
CLOCK
Q
1
Q
2
Q
3
Q
4
1
2
3
4
5
6
7
8
16 V
DD
15
OUTPUT
ENABLE
14 Q
5
13 Q
6
12 Q
7
11 Q
8
10 Q'
S
9
Q
S
STROBE
OUTPUT
ENABLE
Q
1
3-STATE
OUTPUTS
Q
8
PARALLEL OUTPUTS
V
SS
鈥?/div>
Truth table
CLOCK
OUTPUT
STROBE SERIAL IN
ENABLE
H
H
H
L
H
L
NC: No Change
Parallel output
Q
1
L
H
NC
Z
NC
Z
Q
n
Q
n-1
Q
n-1
NC
Z
NC
Z
Serial output
Q
S
Q
7
Q
7
Q
7
Q
7
NC
NC
Q'
S
NC
NC
NC
NC
Q
S
Q
S
H
H
L
X
X
X
L
H
X
X
X
X
X: Irrelevant
Z: High Impedance
1
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