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General-purpose CMOS Logic IC Series (BU4S,BU4000B Series)
High Voltage CMOS Logic ICs
<Function Logic>
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
●Description
BU4015B series ICs are 4-stage static shift registers, each consisting of 2 circuits. The D flip-flops of each stage share a
common reset input, enabling asynchronous reset at any time.
BU4021B series ICs are 8-bit static shift registers configured with 8 register cells, each of which has parallel input.
Control of the parallel/serial input (P/S) enables serial input/output with clock synchronization and well as parallel input/serial
output conversions.
BU4094BC series ICs are shift/store registers, each consisting of an 8-bit shift register and an 8-bit latch. Output can be held
in the data transfer mode because the data read into the shift register can be latched by the asynchronous strobe input,
The BU4538B IC is a monostable multivibrator that can be reset and retriggered from either edge of an input pulse.
A wide range of accurate output pulse widths is available because the output pulse width and accuracy are determined by
the external timing constants Cx an Rx.
The BU4028B IC is a decoder which converts BCD signals into decimal signals.
Of the 10 outputs (Q0 ~ Q9), those corresponding to the input codes A-D are set to “H”, while the others are set to “L”.
●Features
1) Low power consumption
2) Wide operating supply voltage range
3) High impedance
4) High fan out
5) L-TTL2 and LS-TTL1 inputs can be driven directly.
●Applications
BU4015B: serial / parallel data conversion and ring counter.
BU4021B: control circuits, timing circuits and as a general purpose register requiring high degree of noise tolerance.
BU4094BC: series/parallel data conversion and data receivers.
BU4538B: can obtain the output pulse amplitude with improved accuracy by external capacity and resistance.
BU4028B: code conversion, address decoding, memory selection control, demultiplexing or readout and decoding, etc.
●Lineup
BU4015B/
BU4015BF
BU4021B
/
BU4021BF
BU4094BC/
BU4094BCF/
BU4094BCFV
BU4538B
BU4028B
2
circuits
1
circui
t
1
circuit
4-bit registe
r
8-bit register
8-bit register
Monostable
multivibrator
BCD
Decimal
(Dual 4-bit static shift register)
(8-bit static shift register)
(8-bit bus compatible shift/store register)
(Dual high accuracy monostable multivibrator)
(BCD to Decimal decoder)
High VoltageCMOS Logic
<Function Logic>
2
circuits
1
circui
t
No.09050EAT04
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
2/17
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When used at Ta=25℃ or higher the value above is reduced per 1℃. Power Dissipation
is measured by using the sample mounted on a 70mm×70mm×1.6mm
FR4 glass-epoxy PCB (cupper area is less than 3%)
●Absolute Maximum Ratings
Parameter Symbol Limit Unit
BU4015B BU4021B BU4094BC BU4538B BU4028B
Power Supply Voltage VDD -0.3 to 18 V
Supply Current Iin ±10 mA
Operating Temperature Topr -40 to 85 ℃
Storage Temperature Tstg -55 to 150 ℃
Input Voltage VIN -0.3 to VDD+0.3 V
Maximum Junction Temperature Tjmax 150 ℃
●Recommended Operating Conditions
Parameter Symbol Limit Unit
BU4015B BU4021B BU4094BC BU4538B BU4028B
Operating Power Supply VDD 3 to 16 (3 to 18V @BU4094BC) V
Input Voltage VIN 0 to VDD V
●Thermal Derating Curve
●Input / Output Equivalent Circuits
(*1) (*2) (*3) Unit
10.0 5.0 3.1 mW/℃
＜Input＞ ＜Output＞
VD D
GND
VD D
GND
VD D VD D
GND GND
1400
1200
1000
800
400
0
25 50 75 100 125 150 175
Ambient temperature Ta [℃]
Power dissipation Pd [mW]
85℃
600
200
1250[mV] BU4＊＊＊ (*1)
620[mV] BU4＊＊＊FV (*2)
380[mV] BU4＊＊＊F (*3)
(＊)Below shows BU4＊＊＊
BU4015B
BU4021B
BU4094BC
BU4538B
BU4028B
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
3/17
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© 2009 ROHM Co., Ltd. All rights reserved.
●Electrical Characteristics(BU4015B)
DC Characteristics (Unless otherwise noted VSS=0[V],Ta=25[℃])
Parameter Symbol Limits Unit Condition Fig.No
Min Typ Max VDD[V]
Input ‘H’ voltage VIH
3.5 － －
V
5
－ － 7.0 － － 10
11.0 － － 15
Input ‘L’ voltage VIL
－ － 1.5
V
5
－ － － － 3.0 10
－ － 4.0 15
Input ‘H’ current IIH － － 0.3 μA 15 VIH=15[V] －
Input ‘L’ current IIL － － -0.3 μA 15 VIL=0[V] －
Output ‘H’ voltage VOH
4.95 － －
V
5
IO=0[mA] 1 9.95 － － 10
14.95 － － 15
Output ‘L’ voltage VOL
－ － 0.05
V
5
IO=0[mA] 2 － － 0.05 10
－ － 0.05 15
Output ‘H’ current IOH
-0.16 － －
mA
5 VOH=4.6[V]
1 -0.4 － － 5 VOH=9.5[V]
-1.2 － － 15 VOH=13.5[V]
Output ‘L’ current IOL
0.44 － －
mA
5 VOL=0.4[V]
2 1.1 － － 10 VOL=0.5[V]
3.0 － － 15 VOL=1.5[V]
Static supply current IDD
－ － 20
μA
5
VI=VSS or GND － － － 40 10
－ － 80 15
Switching Characteristics (Unless otherwise noted VSS=0[V],Ta=25[℃],CL=50[pF])
Parameter Symbol Limits Unit Condition Fig.No
Min Typ Max VDD[V]
Output rising time tTLH
－ 180 －
ns
5
－ － － 90 － 10
－ 65 － 15
Output falling time TTHL
－ 100 －
ns
5
－ － － 50 － 10
－ 40 － 15
Propagation delay time
CLOCK, D→Q
tPLH
tPHL
－ 310 －
ns
5
－ 3・4
－ 125 － 10
－ 90 － 15
Propagation delay time
RESET→Q
tPLH
tPHL
－ 460 －
ns
5
－ 5・6
－ 180 － 10
－ 120 － 15
Set up time Tsu
－ 100 －
ns
5
－ 7・8 － 50 － 10
－ 40 － 15
Minimum clock pulse
width tW(CLK)
－ 185 －
ns
5
－ 9
－ 85 － 10
－ 55 － 15
Minimum reset pulse
width tW(RST)
－ 200 －
ns
5
－ 10
－ 80 － 10
－ 60 － 15
Maximum clock
frequency
f (CLK)
Max.
－ 20 －
MHz
5
－ －
－ 6.0 － 10
－ 7.5 － 15
Maximum clock
rising/falling time
tr(CLK)
tf(CLK)
－ 100 －
μs
5
－ －
－ 40 － 10
－ 15 － 15
Input capacitance CIN － 5 － pF － － －
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
4/17
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●Electrical Characteristics(BU4021B)
DC Characteristics (Unless otherwise noted VSS=0[V],Ta=25[℃])
Switching Characteristics (Unless otherwise noted VSS=0[V],Ta=25[℃],CL=50[pF])
Parameter Symbol Limits Unit Condition Fig.No
Min Typ Max VDD[V]
Input ‘H’ voltage VIH
3.5 － －
V
5
－ － 7.0 － － 10
11.0 － － 15
Input ‘L’ voltage VIL
－ － 1.5
V
5
－ － － － 3.0 10
－ － 4.0 15
Input ‘H’ current IIH － － 0.3 μA 15 VIH=15[V] －
Input ‘L’ current IIL － － -0.3 μA 15 VIL=0[V] －
Output ‘H’ voltage VOH
4.95 － －
V
5
IO=0[mA] 11 9.95 － － 10
14.95 － － 15
Output ‘L’ voltage VOL
－ － 0.05
V
5
IO=0[mA] 12 － － 0.05 10
－ － 0.05 15
Output ‘H’ current IOH
-0.16 － －
mA
5 VOH=4.6[V]
11 -0.4 － － 5 VOH=9.5[V]
-1.2 － － 15 VOH=13.5[V]
Output ‘L’ current IOL
0.44 － －
mA
5 VOL=0.4[V]
12 1.1 － － 10
VOL=0.5[V]
3.0 － － 15
VOL=1.5[V]
Static supply current IDD
－ － 20
μA
5
VI=VDD or GND － － － 40 10
－ － 80 15
Parameter Symbol Limits Unit Condition Fig.No
Min Typ Max VDD[V]
Output rising time tTLH
－ 180 －
ns
5
－ － － 90 － 10
－ 65 － 15
Output falling time tTHL
－ 100 －
ns
5
－ － － 50 － 10
－ 40 － 15
“L” to ”H”
Propagation delay time
CLOCK→Q P/S→Q
tPLH
－ 400 －
ns
5
－ 13・15
－ 170 － 10
－ 115 － 15
“H” to ”L”
Propagation delay time
CLOCK→Q P/S→Q
tPHL
－ 400 －
ns
5
－ 14・16
－ 170 － 10
－ 115 － 15
Set up time tsu
－ 150 －
ns
5
－ 17 － 50 － 10
－ 30 － 15
Minimum clock pulse
width tW(CLK)
－ 150 －
ns
5
－ 19
－ 75 － 10
－ 40 － 15
Maximum clock
frequency
f (CLK)
Max.
－ 3.0 －
MHz
5
－ －
－ 6.0 － 10
－ 8.0 － 15
Maximum clock
rising/falling time
tr(CLK)
tf(CLK)
－ － 15
μs
5
－ －
－ － 5.0 10
－ － 4.0 15
Minimum P/S
Control pulse width tw(P/S)
－ 150 －
ns
5
－ 20
－ 75 － 10
－ 40 － 15
Input capacitance CIN － 5 － pF － － －
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
5/17
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●Electrical Characteristics(BU4094BC)
DC Characteristics (Unless otherwise noted VSS=0[V],Ta=25[℃])
Parameter Symbol Limits Unit Condition Fig.No
Min Typ Max VDD[V]
Input ‘H’ voltage VIH
3.5 － －
V
5
－ － 7.0 － － 10
11.0 － － 15
Input ‘L’ voltage VIL
－ －1.5
V
5
－ － － －3.0 10
－ －4.0 15
Input ‘H’ current IIH － －0.3 μA 15 VIH=15[V] －
Input ‘L’ current IIL － －-0.3 μA 15 VIL=0[V] －
Output ‘H’ voltage VOH
4.95 － －
V
5
IO=0[mA] 21 9.95 － － 10
14.95 － － 15
Output ‘L’ voltage VOL
－ －0.05
V
5
IO=0[mA] 22 － －0.05 10
－ －0.05 15
Output ‘H’ current IOH
-0.44 － －
mA
5 VOH=4.6[V]
21 -1.1 － － 5 VOH=9.5[V]
-3.0 － － 15 VOH=13.5[V]
Output ‘L’ current IOL
0.44 － －
mA
5 VOL=0.4[V]
22 1.1 － － 10 VOL=0.5[V]
3.0 － － 15 VOL=1.5[V]
Static supply current IDD
－ －5
μA
5
VI=VDD or GND － － －10 10
－ －20 15
Switching Characteristics (Unless otherwise noted VSS=0[V],Ta=25[℃],CL=50[pF])
Parameter Symbol Limits Unit Condition Fig.No
Min Typ Max VDD[V]
Output rising time tTLH
－ 100 200
ns
5
－ － － 50 100 10
－ 40 80 15
Output falling time tTHL
－ 100 200
ns
5
－ － － 50 100 10
－ 40 80 15
Propagation delay time
CLOCK→QS
tPLH
tPHL
－ 350 600
ns
5
－ 23 － 125 250 10
－ 95 190 15
Propagation delay time
CLOCK→Q’S
tPLH
tPHL
－ 230 460
ns
5
－ 24 － 110 220 10
－ 75 150 15
Propagation delay time
CLOCK→QN
tPLH
tPHL
－ 420 840
ns
5
－ 25
－ 195 390 10
－ 135 270 15
Propagation delay time
STROBE→QN
tPLH
tPHL
－ 290 580
ns
5
－ 26 － 145 290 10
－ 100 200 15
3state
Propagation delay time
Output Enable→QN
tPHZ
tPZH
－ 140 280
ns
5
RL=1[kΩ] 27 － 75 150 10
－ 55 110 15
3 state
Propagation delay time
Output Enable→QN
tPLZ
tPZL
－ 140 280
ns
5
RL=1[kΩ] 28 － 75 150 10
－ 55 110 15
Minimum set up time
DATA→CLOCK tsu
－ 20 125
ns
5
－ 29 － 855 10
－ 635 15
Minimum hold time
CLOCK →DATA tH
－ 10 40
ns
5
－ 30 － 10 20 10
－ 515 15
Minimum clock pulse
width tW(CLK)
－ 100 200
ns
5
－ 31 － 50 100 10
－ 40 80 15
Maximum clock
rising/falling time
tr(CL)
tf(CL) NO Limit μs
5
－ － 10
15
Maximum clock
frequency f CL
1.25 2.5 －
MHz
－
－ － 2.5 5 － －
3.0 12.5 － －
Minimum
strobe pulse width TwH
－ 100 200
ns
－
－ － － 40 80 －
－ 35 70 －
Input capacitance CIN － 5 －pF － － －
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
6/17
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●Electrical Characteristics(BU4538B)
DC Characteristics (Unless otherwise noted VSS=0[V],Ta=25[℃])
Parameter Symbol Limits Unit Condition Fig.No
Min Typ Max VDD[V]
Input ‘H’ voltage VIH
3.5 － －
V
5
－ － 7.0 － － 10
11.0 － － 15
Input ‘L’ voltage VIL
－ － 1.5
V
5
－ － － － 3.0 10
－ － 4.0 15
Input ‘H’ current IIH － － 0.3 μA 15 VIH=15[V] －
Input ‘L’ current IIL － － -0.3 μA 15 VIL=0[V] －
Output ‘H’ voltage VOH
4.95 － －
V
5
IO=0[mA] － 9.95 － － 10
14.95 － － 15
Output ‘L’ voltage VOL
－ － 0.05
V
5
IO=0[mA] － － － 0.05 10
－ － 0.05 15
Output ‘H’ current IOH
-0.16 － －
mA
5 VOH=4.6[V]
－ -0.4 － － 5 VOH=9.5[V]
-1.2 － － 15 VOH=13.5[V]
Output ‘L’ current IOL
0.44 － －
mA
5 VOL=0.4[V]
－ 1.1 － － 10 VOL=0.5[V]
3.0 － － 15 VOL=1.5[V]
Static supply current IDD
－ － 20
μA
5
VI=VDD or GND － － － 40 10
－ － 80 15
Switching Characteristics (Unless otherwise noted VSS=0[V],Ta=25[℃],CL=50[pF])
Parameter Symbol Limits Unit Condition Fig.No
Min Typ Max VDD[V]
Output rising time tTLH
－ 100 －
ns
5
－ － － 50 － 10
－ 40 － 15
Output falling time tTHL
－ 100 －
ns
5
－ － － 50 － 10
－ 40 － 15
tPLH
tPHL
－ 300 －
ns
5
－ 32・33
－ 150 － 10
－ 100 － 15
tPLH
tPHL
－ 250 －
ns
5
－ 34・35
－ 125 － 10
－ 95 － 15
Minimum input pulse
width tWIN
－ 50 －
ns
5
－ 36
－ 30 － 10
－ 25 － 15
Output pulse width 1 tWOUT1
185 200 215
μs
5
CX=2000[pF]
RX=100[kΩ] 38
185 200 215 10
185 200 215 15
Output pulse width 2 tWOUT2
8.8 9.4 10.0
ms
5
CX=0.1[uF]
RX=100[kΩ] 39
8.8 9.4 10.0 10
8.8 9.4 10.0 15
Minimum trigger time trr
－ 0 －
ns
5
－ － － 0 － 10
－ 0 － 15
Input capacitance CIN － 5 － pF － － －
Propagation delay time
A,B→Q,Q
Propagation delay time
CD→Q,Q
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
7/17
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●Electrical Characteristics(BU4028B)
DC Characteristics (Unless otherwise noted VSS=0[V],Ta=25[℃])
Parameter Symbol Limits Unit Condition Fig.No
Min Typ Max VDD[V]
Input ‘H’ voltage VIH
3.5 － －
V
5
－ － 7.0 － － 10
11.0 － － 15
Input ‘L’ voltage VIL
－ － 1.5
V
5
－ － － － 3.0 10
－ － 4.0 15
Input ‘H’ current IIH － － 0.3 μA 15 VIH=15[V] －
Input ‘L’ current IIL － － -0.3 μA 15 VIL=0[V] －
Output ‘H’ voltage VOH
4.95 － －
V
5
IO=0[mA] 40 9.95 － － 10
14.95 － － 15
Output ‘L’ voltage VOL
－ － 0.05
V
5
IO=0[mA] 41 － － 0.05 10
－ － 0.05 15
Output ‘H’ current IOH
-0.16 － －
mA
5 VOH=4.6[V]
40 -0.4 － － 5 VOH=9.5[V]
-1.2 － － 15 VOH=13.5[V]
Output ‘L’ current IOL
0.44 － －
mA
5 VOL=0.4[V]
41 1.1 － － 10 VOL=0.5[V]
3.0 － － 15 VOL=1.5[V]
Static supply current IDD
－ － 1
μA
5
VI=VDD or GND － － － 2 10
－ － 4 15
Switching Characteristics (Unless otherwise noted VSS=0[V],Ta=25[℃],CL=50[pF])
Parameter Symbol Limits Unit Condition Fig.No
Min Typ Max VDD[V]
Output rising time tTLH
－ 180 －
ns
5
－ 42 － 90 － 10
－ 65 － 15
Output falling time tTHL
－ 100 －
ns
5
－ 43 － 50 － 10
－ 40 － 15
“L” to ”H”
Propagation delay time tPLH
－ 300 －
ns
5
－ 44
－ 130 － 10
－ 90 － 15
“H” to ”L”
Propagation delay time tPHL
－ 300 －
ns
5
－ 45
－ 130 － 10
－ 90 － 15
Input capacitance CIN － 5 － pF － － －
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
8/17
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●Electrical Characteristics Curves(BU4015B)
0
10
20
30
40
50
0 5 10 15 20
Output Voltage [V]
Output Sink Current [mA]
0
10
20
30
40
50
0 5 10 15 20
Output Voltage [V]
Output Source Current [mA]
0
25
50
75
100
125
150
175
200
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Minimum Reset Pulse Width [ns]
0
100
200
300
400
500
600
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (CLK→Q) [ns]
0
100
200
300
400
500
600
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (RESET→Q) [ns]
0
100
200
300
400
500
600
700
800
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (RESET→Q) [ns]
0
25
50
75
100
125
150
175
200
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Setup Time (Q→CLK) [ns]
0
20
40
60
80
100
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Hold Time (CLK→Q) [ns]
0
100
200
300
400
500
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Minimum Clock Pulse Width [ns]
0
100
200
300
400
500
600
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (CLK→Q) [ns]
Fig.6 Propagation delay tPHL
RESET→Q
Fig.3 Propagation delay tPLH
CLK→Q
Fig.7Set up time tsu
Q→CLK
Fig.8 Hold time th
CLK→Q
Fig.9 Minimum CLK pulse width
Fig.4 Propagation delay tPHL
CLK→Q
Fig.5 Propagation delay tPLH
RESET→Q
VDD=3[V]
VDD=3[V]
VDD=3[V]
VDD=5[V]
VDD=5[V]
VDD=5[V]
VDD=10[V]
VDD=10[V]
VDD=16[V]
VDD=16[V] VDD=16[V]
VDD=10[V]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
-40[℃]
25[℃]
85[℃]
VDD=5[V]
VDD=16[V]
VDD=10[V]
Fig.10Minimum RESET
pulse width
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
VDD=3[V]
VDD=5[V]
VDD=3[V]
VDD=3[V]
VDD=5[V]
VDD=10[V]
VDD=16[V]
-40[℃]
25[℃]
85[℃]
Fig.2 Output sink
current－voltage
Fig.1 Output source
current－voltage
-40[℃]
25[℃]
85[℃]
-40[℃]
25[℃]
85[℃]
-40[℃]
25[℃]
85[℃]
-40[℃]
25[℃]
85[℃]
○Switching characteristics
VDD=10[V]
VDD=15[V]
VDD=5[V]
VDD=10[V]
VDD=15[V]
VDD=5[V]
90%
50%
10%
20[ns] 20[ns]
D （入力データ）
90%
50%
10%
tsu
CLOCK
20[ns]
90%
50%
10%
tPLH tPHL
tTLH tTHL
Q0 (出力データ)
tWH
tWL
20[ns]
th
VDD
GND(VSS)
VDD
GND(VSS)
VOH
VOL
Operating Temperature Range
Operating Temperature Range
Operating Temperature Range Operating Temperature Range Operating Temperature Range
VDD=10[V]
VDD=16[V]
Operating Temperature Range
Operating Temperature Range
Operating Temperature Range
[BU4015B/F] [BU4015B/F] [BU4015B/F]
[BU4015B/F] [BU4015B/F] [BU4015B/F]
[BU4015B/F] [BU4015B/F] [BU4015B/F]
[BU4015B/F]
D (Input data)
Q0 (Output data)
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
9/17
www.rohm.com 2009.06 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
●Electrical Characteristics Curves(BU4021B)
0
20
40
60
80
100
120
140
160
180
200
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Hold Time (CLK→DATA) [ns]
0
100
200
300
400
500
600
700
800
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (CLK→QS) [ns]
0
100
200
300
400
500
600
700
800
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (P/S→QS) [ns]
0
100
200
300
400
500
600
700
800
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (P/S→QS) [ns]
0
25
50
75
100
125
150
175
200
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Setup Time (DATA→CLK) [ns]
0
20
40
60
80
100
120
140
160
180
200
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Hold Time (CLK→DATA) [ns]
0
20
40
60
80
100
120
140
160
180
200
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Minimum CLK Pulse Width [ns]
0
100
200
300
400
500
600
700
800
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (CLK→QS) [ns]
0
10
20
30
40
50
0 5 10 15 20
Output Voltage [V]
Output Source Current [mA]
0
10
20
30
40
50
0 5 10 15 20
Output Voltage [V]
Output Sink Current [mA]
Fig.16 Propagation delay tPHL
P/S→QS
Fig.13 Propagation delay tPLH
CLK→QS
Fig.17 Set up time tsu
Q→CLK
Fig.18 Hold time th
CLK→Q
Fig.19 Minimum CLK
pulse width
Fig.14 Propagation delay tPHL
CLK→QS
Fig.15 Propagation delay tPLH
P/S→QS
VDD=3[V]
VDD=3[V]
VDD=3[V]
VDD=5[V]
VDD=5[V]
VDD=5[V]
VDD=10[V]
VDD=10[V]
VDD=16[V]
VDD=16[V]
VDD=16[V]
VDD=10[V]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
Fig.12 Output sink
current－voltage
Fig.11 Output source
current－voltage
VDD=5[V]
VDD=16[V]
VDD=10[V]
Fig.20 Minimum P/S
pulse width
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
VDD=3[V]
VDD=3[V]
VDD=5[V]
VDD=10[V]
VDD=16[V]
25[℃]
85[℃]
-40[℃]
-40[℃]
25[℃]
85[℃]
-40[℃]
25[℃]
85[℃]
-40[℃]
25[℃]
85[℃]
-40[℃]
25[℃]
85[℃]
-40[℃]
25[℃]
85[℃]
[BU4021B/F] [BU4021B/F]
○Switching characteristics
VDD=10[V]
VDD=15[V]
VDD=5[V]
VDD=10[V]
VDD=15[V]
VDD=5[V]
90%
50%
10%
20[ns] 20[ns]
90%
50%
10%
tsu
CLOCK
or
P/S
tf
90%
50%
10%
tPLH tPHL
tTLH tTHL
OUTPUT
tW tr th
VDD
GND(VSS)
VDD
GND(VSS)
VOH
VOL
Parallel Data
or
Serial Data
Operating Temperature Range
Operating Temperature Range
Operating Temperature Range Operating Temperature Range Operating Temperature Range
Operating Temperature Range
Operating Temperature Range
Operating Temperature Range
[BU4021B/F]
[BU4021B/F] [BU4021B/F] [BU4021B/F]
[BU4021B/F] [BU4021B/F] [BU4021B/F]
[BU4021B/F]
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
10/17
www.rohm.com 2009.06 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
●Electrical Characteristics Curves(BU4094BC)
○Switching characteristics are
stated on page 14.
0
50
100
150
200
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Hold Time (CLK→DATA) [ns]
0
100
200
300
400
500
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (CLK→Q'S) [ns]
0
100
200
300
400
500
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (CLK→QN) [ns]
0
100
200
300
400
500
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (STROBE→QN) [ns]
0
50
100
150
200
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (Output Enable→QN)
[ns]
0
50
100
150
200
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (Output Enable→QN)
[ns]
0
10
20
30
40
50
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Setup Time (DATA→CLK） [ns]
0
100
200
300
400
500
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay (CLK→Qs) [ns]
Fig.26 Propagation delay
STROBE→QN
Fig.23 Propagation delay CLK→QS
Fig.27 Propagation delay tPHZ
Output Enable→QN
Fig.28 Propagation delay tPLZ
Output Enable→QN
Fig.29 Set up time tsu
DATA→CLK
Fig.24 Propagation delay
CLK→Q’S
Fig.30 Hold time tH
CLK→DATA
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
tPHL
0
10
20
30
40
50
0 5 10 15 20
Output Voltage [V]
Output Source Current [mA]
0
10
20
30
40
50
0 5 10 15 20
Output Voltage [V]
Output Sink Current [mA]
Fig.22 Output sink
current－voltage
Fig.21 Output source
current－voltage
0
50
100
150
200
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Minimum CLK Pulse Width [ns]
Fig.31 Minimum CLK pulse width
tW(CLK)
Fig.25 Propagation delay
CLK→QN
25[℃]
85[℃]
-40[℃]
-40[℃]
25[℃]
85[℃]
-40[℃]
25[℃]
85[℃]
-40[℃]
25[℃]
85[℃]
-40[℃]
25[℃]
85[℃]
-40[℃]
25[℃]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
tPLH
VDD=5[V]
VDD=16[V]
VDD=10[V] VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
tPLH
VDD=5[V]
VDD=16[V]
VDD=10[V]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
tPLH VDD=5[V]
VDD=16[V]
VDD=10[V]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
tPLH
VDD=5[V]
VDD=16[V]
VDD=10[V]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
tPLH
VDD=16[V]
VDD=10[V]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
tPLH
tPHL
VDD=3[V]
tPHL
VDD=3[V]
tPHL
VDD=3[V]
tPHL
VDD=3[V]
tPHL
VDD=3[V]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
85[℃]
VDD=5[V]
[BU4094BC/F/FV]
VDD=10[V]
VDD=15[V]
VDD=5[V]
VDD=10[V]
VDD=15[V]
VDD=5[V]
Operating Temperature Range
Operating Temperature Range
Operating Temperature Range
Operating Temperature Range Operating Temperature Range Operating Temperature Range
Operating Temperature Range
Operating Temperature Range
Operating Temperature Range
[BU4094BC/F/FV] [BU4094BC/F/FV]
[BU4094BC/F/FV] [BU4094BC/F/FV] [BU4094BC/F/FV]
[BU4094BC/F/FV] [BU4094BC/F/FV] [BU4094BC/F/FV]
[BU4094BC/F/FV] [BU4094BC/F/FV]
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
11/17
www.rohm.com 2009.06 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
●Electrical Characteristics Curves(BU4538B)
○ Switching Characteristics
-5
-4
-3
-2
-1
0
1
2
3
4
5
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Normalized Pulse Width Change [%]
0
200
400
600
800
1000
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (A→Q) [ns]
VDD=16[V]
VDD=10[V]
0
200
400
600
800
1000
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (A→Q) [ns]
0
100
200
300
400
500
600
700
800
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (CD→Q) [ns]
0
100
200
300
400
500
600
700
800
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time (CD→Q) [ns]
0
20
40
60
80
100
120
140
160
180
200
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Minimum Input Pulse Width [ns]
0
20
40
60
80
100
120
140
160
180
200
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Minimum RESET Pulse Width [ns]
Fig.34 Propagation delay tPHL
CD→Q
Fig.35 Propagation delay tPLH
CD→Q
Fig.37 Minimum RESET pulse width
tRESET
Fig.32 Propagation delay tPLH
A→Q
Fig.33 Propagation delay tPHL
A→Q
VDD=3[V]
VDD=3[V]
VDD=3[V]
VDD=5[V] VDD=5[V] VDD=5[V]
VDD=10[V] VDD=10[V]
VDD=16[V]
VDD=16[V] VDD=16[V]
VDD=10[V]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
VDD=5[V]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
VDD=3[V]
-5
-4
-3
-2
-1
0
1
2
3
4
5
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Normalized Pulse Width Change [%]
Fig.38 Output pulse width tWOUT1
(CX=2000[pF],RX=100[kΩ])
VDD=3[V]
VDD=3[V]
VDD=5[V]
VDD=10[V]
VDD=10[V]
VDD=16[V]
VDD=16[V]
Fig.39 Output pulse width tWOUT2
(CX=0.1[μF],RX=100[kΩ])
Fig.36 Minimum input pulse width
tWIN
90%
50%
10%
tPLH
tPHL
tTHL
50%
50%
ｔWOUT
tPLH
50%
90%
10%
50%
90%
10%
50%
90%
10%
tTLH
90%
10%
20[ns]
90%
10%
20[ns]
20[ns] 20[ns]
trr
50%
tPLH
50%
tPLH
90%
10%
50% 50%
tPLH
50%
A
B
CD
Q
Q
20[ns]20[ns]
Operating Temperature Range
Operating Temperature Range
Operating Temperature Range Operating Temperature Range
Operating Temperature Range
Operating Temperature Range
Operating Voltage Range
VDD=5[V]
Operating Voltage Range
[BU4538B] [BU4538B] [BU4538B]
[BU4538B] [BU4538B] [BU4538B]
[BU4538B] [BU4538B]
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
12/17
www.rohm.com 2009.06 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
0
10
20
30
40
50
0 5 10 15 20
Output Voltage [V]
Output Sourace Current [mA]
●Reference data(BU4028B)
(*) Switching characteristics is shown in P15.
●Description of BU4015B series model
Function：Dual 4-bit static shift register
1) Description of operation
Dual 4-bit static shift register of BU4015B is configured with 2 independent serial input/parallel output registers of the same 4-state.
Each register is provided with an independent clock and reset input having one series data input. Register state is the D
type master/slave flip-flop. Data is shifted to the next stage during the rise time of the clock. Each register can be cleared
by addition of “H” level to reset.
PIN arrangement Block diagram
Truth table
PIN description
PIN No. Symbol I/O Function
1 CLOCKB I Clock input (CHB)
2 Q3B O Output 3 (CHB)
3 Q2A O Output 2 (CHA)
4 Q1A O Output 1 (CHB)
5 Q0A O Output 0 (CHA)
6 RESETA I Reset input (CHA)
7 DA I Data input (CHA)
8 VSS ― Power supply(-)
9 CLOCKA I Clock input (CHA)
10 Q3A O Output 3 (CHA)
11 Q2B O Output 2 (CHB)
12 Q1B O Output 1 (CHB)
13 Q0B O Output 0 (CHB)
14 RESETB I Reset input (CHB)
15 DB I Data input (CHB)
16 VDD ― Power supply(+)
0
50
100
150
200
250
300
350
400
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Output Rise Time [ns]
0
50
100
150
200
250
300
350
400
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Output Fall Time [ns]
Fig.42 Propagation delay tTLH
Fig.43 Propagation delay tTHL
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
0
100
200
300
400
500
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time [ns]
0
100
200
300
400
500
-50 -25 0 25 50 75 100
Ambient Temperature [℃]
Propagation Delay Time [ns]
Fig.44 Propagation delay tPLH
Fig.45 Propagation delay tPHL
VDD=3[V]
VDD=3[V]
VDD=5[V] VDD=5[V]
VDD=10[V]
VDD=16[V] VDD=16[V]
VDD=10[V]
0
10
20
30
40
50
0 5 10 15 20
Output Voltage [V]
Output Sink Current [mA]
-40[℃]
25[℃]
85[℃]
-40[℃]
25[℃]
85[℃]
Fig.41 Output sink
current－voltage
Fig.40 Output source
current－voltage
-40[℃]
25[℃]
-40[℃]
25[℃]
85[℃]
85[℃]
-40[℃]
25[℃]
85[℃]
-40[℃]
85[℃]
25[℃]
VDD=3[V]
VDD=5[V]
VDD=16[V]
VDD=10[V]
[BU4028B] [BU4028B]
VDD=10[V]
VDD=15[V]
VDD=5[V]
VDD=10[V]
VDD=15[V]
VDD=5[V]
Operating Temperature Range
Operating Voltage Range
Operating Temperature Range Operating Temperature Range
[BU4028B]
[BU4028B] [BU4028B] [BU4028B]
D
CL R
Q
Q
D
CL R
Q
Q
D
CL R
Q
Q
D
CL R
Q
Q
D
CLOCK
RESET
Q0 Q1 Q2 Q3
CLOCK D RESET Q0 Q1 Q2 Q3
XXHLLLL
No ChangeLX
H
LL
L
L
LQ0
H
Q1 Q2
Q0 Q1 Q2
X：Don't Care
1
2
4
5
6
7
14
13
12
9
CLOCK B
Q0B
Q2B
Q3A
CLOCK A
Q1B
11
3
10
RESET B
Q3B
Q2B
Q1
A
Q0
A
RESET
A
D
A
8
VSS
15
D8
16
VDD
CL R D
Q3 Q2 Q1 Q0
CL R D
Q0 Q1 Q2 Q3
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
13/17
www.rohm.com 2009.06 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
1
2
4
5
6
7
14
13
12
9
P8
P5
DS
CLOCK
P/S
Q7
11
3
10
P6
Q6
Q8
P4
P3
P2
P1
8
VSS
15
P7
16
VDD
P8
Q6
Q8
P4
P3
P2
P1
P7
P6
Q5
Q7
DS
CLOCK
P/S
●Description of BU4021B series model
Function: 8-stage static shift register
1) Description of operation
BU4021B is an 8-bit static shift register capable of parallel input/series output and series input/series output. In parallel
operation, DS (data) being asynchronous with the clock is inputted into each F/F and obtained at output.
In series operation, DS (data) is triggered by clock.
When P/S input level is “H”, parallel operation is effective, and when P/S input level is “L”, series operation is effective.
PIN arrangement Block diagram
Truth table
●Description of BU4094BC series model
Function: Dual 4-bit static shift register
1) Description of operation
BU4094BC is an 8-stage shift/store register provided in each stage with a data latch with 3-state output. Data read into
shift register is read into the latch during the fall time of asynchronous STROBE input, and in the data transfer mode,
output can be held. Data is passed through the latch and outputted when the STROBE is in “H” level. Because the parallel
output becomes high impedance when the OUTPUT ENABLE terminal is set to “L” level by 3-state, the parallel output can
be connected directly with the 8-bit pass line.
PIN arrangement
PIN description
PIN No. Symbol I/O Function
1 P8 I Parallel data input 8
2 Q6 O Output 6
3 Q8 O Output 8
4 P4 I Parallel data input 4
5 P3 I Parallel data input 3
6 P2 I Parallel data input 2
7 P1 I Parallel data input 1
8 VSS ― Power supply(-)
9 P/S I
Parallel/Serial
10 CLOCK I Clock input
11 DS I Serial data input
12 Q7 O Output 7
13 P5 I Parallel data input 5
14 P6 I Parallel data input 6
15 P7 I Parallel data input 7
16 VDD ― Power supply (+)
PIN description
PIN No. Symbol I/O Function
1 STROBE I Latch input
2 SERIALIN I Data input
3 CLOCK I Clock input
4 Q1 O Parallel data input Q1
5 Q2 O Parallel data input Q2
6 Q3 O Parallel data input Q3
7 Q4 O Parallel data input Q4
8 VSS ― Power supply(-)
9 QS O Serial data output QS
10 Q’S O Serial data output Q’S
11 Q8 O Parallel data output Q8
12 Q7 O Parallel data output Q7
13 Q6 O Parallel data output Q6
14 Q5 O Parallel data output Q5
15 ENABLE I Output enable
16 VDD ― Power supply (+)
CLOCK D RESET Q0 Q1 Q2 Q3
X X H L LLL
No ChangeX
H
LL
L
L
LQ0
H
Q1 Q2
Q0 Q1 Q2
CLOCK DS P/S Dm Qm*
X
XHL
H
L
HH
X：Don't Care
*：Q6,Q7,Q8は外部
X：Don't Care
1
2
4
5
6
7
14
13
12
9
STROBE
Q6
Q8
Q'S
QS
Q7
11
3
10
Q5
SERIAL
CLOCK
Q1
Q2
Q3
Q4
8
VSS
15
OUTPUT
16
VDD
IN ENABLE
STROBE
SERIA
IN
CLOCK
Q1
Q2
Q3
Q4
Q6
Q8
Q'S
QS
Q7
Q5
OUTPU
T
ENABLE
CLOCK
D
D
C
Q
D
C
Q
D
C
Q
D
C
Q
D
C
Q
D
C
D
C
Q
Q
D
C
Q
QQQ
P/S
Q
Q
P1 P2 P3 P4 P5 P6 P7 P8
*:Q6,Q7,Q8: outside
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
14/17
www.rohm.com 2009.06 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
1
2
4
5
6
7
14
13
12
9
T1
A
CDB
BB
QB
QB
A
B
11
3
10
T2B
T2
A
CD
A
AA
B
A
Q
A
Q
A
8
VSS
15
T1B
16
VDD
CD
T1
T2
QQ
BA
CD
T1
T2
QQ
BA
CHA
CHB
Block diagram Truth table
○ Switching characteristics
●Description of BU4538B series model
Function: Dual high accuracy monostable multivibrator
1) Description of operation
BU4538B is a re-triggerable monostable multi vibrator. Triggering is possible from either edge of the rise time and fall time
of input pulse. Output pulse setting is determined by the time constant (Rx · Cx) of external Rx and Cx.
Recommended output pulse amplitude is 200[μs]~1[s].
(Cautions on use: In case of system power down, etc., electric charge accumulated in the capacity Cx is discharged to the
VDD terminal through protective diode of 2 pins of 14 pins. When the electric current due to accumulated electric charge
exceeds 10[mA], IC may be destructed. When a large capacity Cx is used, electric current flowing into the IC can be
restricted by inserting the diode Dx.)
PIN arrangement Block diagram
Truth table
PIN description
PIN No. Symbol I/O Function
1 T1A ― Passive component
connection pin 1(CHA)
2 T2A ― Passive component
connection pin 2(CHA)
3 CDA I Reset input (CHA)
4 AA I Input A(CHA)
5 BA I Input B(CHA)
6 QA O Output Q(CHA)
7 QAB O Output QB(CHA)
8 VSS ― Power supply(-)
9 QBB O Output QB(CHB)
10 QB O Output Q(CHB)
11 BB I Input B(CHB)
12 AB I Input A(CHB)
13 CCB I Reset input (CHB)
14 T2B ― Passive component
connection pin 1(CHB)
15 T1B ― Passive component
connection pin 2(CHB)
16 VDD ― Power supply (+)
Vref1
R
S
Q
Q
Q
SQR
Vref2
Enable Enable
Control
CD
B
A
RXDX
CX
VDD VDD
Q
Q
Reset Latch
Output
Latch
ABCD
OUTPUT
Q
L
HH
H
X：Don't Care
H
HH
H
HL H
INPUT
L
L
L
Q
H
L
X
8 STAGE
SHIFT REGISTER
CLOCK
SERIAL IN
OUTPUT
ENABLE
8 BIT
LACTH
3 STATE
OUTPUTS
STROBE
Q1 Q8
PARALLEL OUTPUTS
SERIAL
OUTPUT
QS
Q'S CLOCK OUTPUT
ENABLE STROBE
Parallel Output
Qn-1
Q1 Qn
Serial Output
Qs Q's
Q7 NC
HQn-1
Z
Qs
SERIAL
IN
L
X
NC
NC
NC
NC
NC
NC NC
NC NC
Q7
Q7
Q7
Z
Z
Z
H
HH
H
H
H
H
HH
L
L
LXX
XX
XQs
ｔWH
50% 50% 50%
tPHZ
50%
90%
90%
10%
90%
10% 50%
10% 10%
90%
50% 50%
50%50%
tWL
50%
tPLH
tTLH tTHL
tPZH
50%
tPLZ
tPZL
tPHL
tpLH
tpLH
ｔsu ｔh
90%
10%
tr tf
50%
tPHL tPLH
tpHL
CLOCK
DA TA
STROBE
OUTPUT
ENA B LE
Q1～Q7
QS
QS'
Q’S
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
15/17
www.rohm.com 2009.06 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
1
2
4
5
6
7
14
13
12
9
Q4
B
D
A
Q8
C
11
3
10
Q1
Q2
Q0
Q7
Q9
Q5
Q6
8
VSS
15
Q3
16
VDD
Q2
Q0
Q7
Q9
Q5
Q6
Q3
Q1
B
C
D
A
Q4
Q8
IN
●Description of BU4028B series model
Function: BCD to decimal decoder
1) Description of operation
BU4028B is a decoder to convert BCD signals into decimal signals. Out of 10 outputs of Q0~Q9, output applicable for the
input code of A~D becomes “H” level and all other outputs become “L” level. When the input of D is made to be inhibit input
by using 3 inputs of A~C, this product can be used as a 1-OF-8 decoder.
PIN arrangement Block diagram
Truth table Switching characteristics
●Notes for use
1. Absolute maximum ratings
An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break
down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. If any over rated
values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses.
2. Connecting the power supply connector backward
Connecting of the power supply in reverse polarity can damage IC. Take precautions when connecting the power supply
lines. An external direction diode can be added.
3. Power supply lines
Design PCB layout pattern to provide low impedance GND and supply lines. To obtain a low noise ground and supply line,
separate the ground section and supply lines of the digital and analog blocks. Furthermore, for all power supply terminals
to ICs, connect a capacitor between the power supply and the GND terminal. When applying electrolytic capacitors in the
circuit, not that capacitance characteristic values are reduced at low temperatures.
4. GND voltage
The potential of GND pin must be minimum potential in all operating conditions.
5. Thermal design
Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions.
6. Inter-pin shorts and mounting errors
Use caution when positioning the IC for mounting on printed circuit boards. The IC may be damaged if there is any
connection error or if pins are shorted together.
7. Actions in strong electromagnetic field
Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to malfunction.
8. Testing on application boards
When testing the IC on an application board, connecting a capacitor to a pin with low impedance subjects the IC to stress.
Always discharge capacitors after each process or step. Always turn the IC's power supply off before connecting it to or
removing it from a jig or fixture during the inspection process. Ground the IC during assembly steps as an antistatic
measure. Use similar precaution when transporting or storing the IC.
9. Ground Wiring Pattern
When using both small signal and large current GND patterns, it is recommended to isolate the two ground patterns,
placing a single ground point at the ground potential of application so that the pattern wiring resistance and voltage
variations caused by large currents do not cause variations in the small signal ground voltage. Be careful not to change the
GND wiring pattern of any external components, either.
10. Unused input terminals
Connect all unused input terminals to VDD or VSS in order to prevent excessive current or oscillation
Insertion of a resistor (100kΩ approx.) is also recommended
PIN description
PIN
No.
Symb
ol
I/
O Function
1 Q4 O Output 4
2 Q2 O Output 2
3 Q0 O Output 0
4 Q7 O Output 7
5 Q9 O Output 9
6 Q5 O Output 5
7 Q6 O Output 6
8 VSS ― Power supply(-)
9 Q8 O Output 8
10 A I Input A
11 D I Input D
12 C I Input C
13 B I Input B
14 Q1 O Output 1
15 Q3 O Output 3
16 VDD ― Power supply (+)
D
C
B
A
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
D B
OUTPUT
INPUT
C A Q9 Q8 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0
L
LLLH
LLLLLLLHL
L
LLHL
LLLLLLLLH
L
LLHH
LLLLLLHLL
L
LHLL
LLLLHLLLL
L
LHLH
LLLLLHL LL
L
L HHL
LLLHLLLLL
L
L HHH
LHLLLLLLL
L
HLLL
LLHL LLLLL
L
HLLH
HLLLLLLLL
H
HLHL
LLLLLLLLL
L
HLHH
LLLLLLLLL
L
HHLL
LLLLLLLLL
L
HHLH
LLLLLLLLL
L
HHHL
LLLLLLLLL
L
HHHH
LLLLLLLLL
L
LLLL
LLLLLLLLL
90%
50%
10%
90%
50%
10%
tTLH tTHL
Input wave
Output wave
Neg.
Pos.
tPHL tPLH
20[ns] 20[ns]
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
16/17
www.rohm.com 2009.06 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
●Ordering part number
B U 4 0 1 5 B F V - E 2
Part No. Part No.
4015B
4021B
4094BC
4538B
4028B
Package
None: DIP16
F : SOP16
FV : SSOP-B16
Packaging and forming specification
E2: Embossed tape and reel
None:Tray,Tube
.
(Unit : mm)
SOP16
8
0.1
16
1.27
0.11
1
9
0.3MIN
10±0.2
0.15±0.1
0.4±0.1
1.5±0.1 6.2±0.3
4.4±0.2
(MAX 10.35 include BURR)
∗
Order quantity needs to be multiple of the minimum quantity.
<Tape and Reel information>
Embossed carrier tapeTape
Quantity
Direction
of feed
The direction is the 1pin of product is at the upper left when you hold
reel on the left hand and you pull out the tape on the right hand
2500pcs
E2
()
Direction of feed
Reel 1pin
(Unit : mm)
SSOP-B16
4.4±0.2
6.4±0.3
1.15±0.1
9
8
16
1
0.10
0.65
0.3Min.
5.0±0.2
0.22±0.1
0.15±0.1
0.1
∗
Order quantity needs to be multiple of the minimum quantity.
<Tape and Reel information>
Embossed carrier tapeTape
Quantity
Direction
of feed
The direction is the 1pin of product is at the upper left when you hold
reel on the left hand and you pull out the tape on the right hand
2500pcs
E2
()
Direction of feed
Reel 1pin
Technical Note
BU4015B,BU4015BF,BU4021B,BU4021BF,
BU4094BC,BU4094BCF,BU4094BCFV,BU4538B,BU4028B
17/17
www.rohm.com 2009.06 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
(Unit : mm)
DIP16
19.4±0.3
6.5±0.3
0.51Min.
4.25±0.3
3.2±0.2
2.54 0.5±0.1 0°−15°
7.62
0.3±0.1
18
16 9
∗
Order quantity needs to be multiple of the minimum quantity.
<Tape and Reel information>
TubeContainer
Quantity
Direction of feed 1000pcs
Direction of products is fixed in a container tube
R0039
A
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
Notice
ROHM Customer Support System
http://www.rohm.com/contact/
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specied herein is subject to change for improvement without notice.
The content specied herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specied in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specied herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specied in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, ofce-automation equipment, commu-
nication devices, electronic appliances and amusement devices).
The Products specied in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, re or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, re control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller,
fuel-controller or other safety device). ROHM shall bear no responsibility in any way for use of
any of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specied herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
