BU4094BC Datasheet, PDF (1/5 Pages) Rohm – 8-bit compatible shift / store register

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.
•^{Logic circuit diagram}
•^{Block diagram}
SERIAL
IN
CLOCK
STROBE
8-STAGE
SHIFT REGISTER
8-BIT
LATCHES
QS
Q'S
SERIAL
OUTPUT
OUTPUT
ENABLE
3-STATE
OUTPUTS
Q1
Q8
PARALLEL OUTPUTS
STROBE 1
SERIAL
IN
2
CLOCK 3
Q1 4
Q2 5
Q3 6
Q4 7
VSS 8
16 VDD
15
OUTPUT
ENABLE
14 Q5
13 Q6
12 Q7
11 Q8
10 Q'S
9 QS
•^{Truth table}
CLOCK
OUTPUT
ENABLE
STROBE
SERIAL IN
H
H
L
H
H
H
H
L
X
L
X
X
H
X
X
L
X
X
NC: No Change Z: High Impedance X: Irrelevant
Parallel output
Q1
Qn
L
Qn-1
H
Qn-1
NC
NC
Z
Z
NC
NC
Z
Z
Serial output
QS
Q'S
Q7
NC
Q7
NC
Q7
NC
Q7
NC
NC
QS
NC
QS
1