ROHM BU4094BCFV, BU4094BC Datasheet
1
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
•
Truth table
8-STAGE
SHIFT REGISTER
IN
CLOCK
SERIAL
Q
S
Q'S
SERIAL
OUTPUT
PARALLEL OUTPUTS
8-BIT
LATCHES
STROBE
3-STATE
OUTPUTS
OUTPUT
ENABLE
Q1 Q8
CLOCK
OUTPUT
ENABLE
STROBE
Parallel output Serial output
Q
1 Qn QS
HH L L Q7 NC
HH H H Q
7 NC
HL XNCNCQ
7 NC
LX X ZZQ
7 NC
HX XNCNCNCQ
S
LX X ZZNCQS
Qn-1
Qn-1
SERIAL IN
Q'
S
NC: No Change Z: High Impedance X: Irrelevant
•
Block diagram
2
SERIAL
IN
STROBE
Q
1
Q2
Q3
Q4
CLOCK
3
4
5
6
7
8
15
14
13
12
11
10
9
V
SS
1
OUTPUT
ENABLE
V
DD
Q6
Q7
Q8
Q'S
Q5
QS
16
2
Standard ICs BU4094BC / BU4094BCF / BU4094BCFV
•
Absolute maximum ratings (Ta = 25°C)
Parameter Symbol Limits Unit
Power supply voltage V
DD V
Power dissipation mW
Operating temperature Topr °C
Storage temperature Tstg °C
Input voltage V
IN V – 0.5 ~ VDD + 0.5
Pd
– 0.5 ~ + 20
– 55 ~ + 150
– 40 ~ + 85
1000 (DIP), 500 (SOP)
400 (SSOP)
•
Electrical characteristics
DC characteristics (unless otherwise noted, V
SS = 0V, Ta = 25°C)
Parameter Symbol Min. Typ. Max. Unit Conditions
V
DD (V)
Input high level voltage
Input low level voltage
Input high level current
Input low level current
Output high level voltage
Output low level voltage
Output high level current
Output low level current
Static current dissipation
Output high level
disable current
Output low level
disable current
V
IH
3.5 — —
V
5
—7.0 — — 10
11.0 — — 15
V
IL
— — 1.5
V
5
—— — 3.0 10
— — 4.0 15
I
IH — — 0.3 µA15VIH = 15V
I
IL — — – 0.3 µA15VIL = 0V
V
OH
4.95 — —
V
5
I
O = 0mA9.95 — — 10
14.95 — — 15
V
OL
— — 0.05
V
5
I
O = 0mA— — 0.05 10
— — 0.05 15
I
OH
– 0.44 — —
mA
5VOH = 4.6V
– 1.1 — — 10 V
OH = 9.5V
– 3.0 — — 15 V
OH = 13.5V
I
OL
0.44 — —
mA
5VOL = 0.4V
1.1 — — 10 V
OL = 0.5V
3.0 — — 15 V
OL = 1.5V
I
DD
IDH
——20
µA
µA
5
V
I = VDD, or GND
V
OUT = 15V
— — 40 10
——80
— — 1.0
15
15
I
DL µAVOUT = 0V— — – 1.0 15
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