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 diagramBlock diagram
YY
SERIALSTROBE116 VDD
IN8-STAGEQS
SHIFT REGISTERCLOCKQ'SSERIAL215OUTPUT
INENABLE
SERIAL
OUTPUTCLOCK 314Q5
8-BIT
STROBELATCHESQ1413Q6
Q2512Q7
OUTPUT3-STATEQ3611Q8
ENABLEOUTPUTS
Q4710Q'S
Q1Q8
PARALLEL OUTPUTS
VSS 89QS
Truth table
Y
Parallel outputSerial output
OUTPUT
CLOCKSTROBESERIAL IN
ENABLE
Q1QnQSQ'S
HHLLQn-1Q7NC
HHHHQn-1Q7NC
HLXNCNCQ7NC
LXXZZQ7NC
HXXNCNCNCQS
LXXZZNCQS
NC: No Change Z: High Impedance X: Irrelevant
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