Rohm BU4922 Low voltage standard cmos voltage detector ic sery Datasheet

Voltage Detector IC Series
Low Voltage Standard
CMOS Voltage Detector IC Series
No.09006ECT01
BU48□□G, BU48□□F, BU48□□FVE, BU49□□G, BU49□□F, BU49□□FVE series
 Description
ROHM standard CMOS reset IC series is a high-accuracy low current consumption reset IC series.
The lineup was established with two output types (Nch open drain and CMOS output) and detection voltage range from
0.9V to 4.8V in increments of 0.1V, so that the series may be selected according to the application at hand.
 Features
1) Detection voltage from 0.9V to 4.8V in 0.1V increments
2) Highly accurate detection voltage: ±1.0%
3) Ultra-low current consumption
4) Nch open drain output (BU48□□G/F/FVE)and CMOS output (BU49□□G/F/FVE)
5) Small surface package
SSOP5: BU48□□G,BU49□□G
SOP4: BU48□□F,BU49□□F
VSOF5: BU48□□FVE,BU49□□FVE
 Applications
All electronics devices that use microcontrollers and logic circuits.
 Selection Guide
No.
1
Specifications
Output Circuit Format
Description
8:Open Drain Output, 9:CMOS Output
Part Number : BU4
Example VDET: Represented as 0.1V steps in the
2
1
2
Detection Voltage
range from 0.9V to 4.8V
3
(Displayed as 0.9 in the case of 0.9V)
3
Package
G:SSOP5(SMP5C2)/ F :SOP4/ FVE:VSOF5(EMP5)
 Lineup
Making
Detection
voltage
Part
Number
Making
Detection
voltage
JR
JQ
JP
JN
JM
JL
JK
JJ
JH
JG
JF
JE
JD
JO
JB
JA
HZ
HY
HX
HW
4.8V
4.7V
4.6V
4.5V
4.4V
4.3V
4.2V
4.1V
4.0V
3.9V
3.8V
3.7V
3.6V
3.5V
3.4V
3.3V
3.2V
3.1V
3.0V
2.9V
BU4848
BU4847
BU4846
BU4845
BU4844
BU4843
BU4842
BU4841
BU4840
BU4839
BU4838
BU4837
BU4836
BU4835
BU4834
BU4833
BU4832
BU4831
BU4830
BU4829
HV
HU
HT
HS
HR
HQ
HP
HN
HM
HL
HK
HJ
HH
HG
HF
HE
HD
HC
HB
HA
2.8V
2.7V
2.6V
2.5V
2.4V
2.3V
2.2V
2.1V
2.0V
1.9V
1.8V
1.7V
1.6V
1.5V
1.4V
1.3V
1.2V
1.1V
1.0V
0.9V
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© 2009 ROHM Co., Ltd. All rights reserved.
Part
Number
Making
Detection
voltage
Part
Number
Making
Detection
voltage
Part
Number
LH
LG
LF
LE
LD
LC
LB
LA
KZ
KY
KX
KW
KV
KU
KT
KS
KR
KQ
KP
KN
4.8V
4.7V
4.6V
4.5V
4.4V
4.3V
4.2V
4.1V
4.0V
3.9V
3.8V
3.7V
3.6V
3.5V
3.4V
3.3V
3.2V
3.1V
3.0V
2.9V
BU4948
BU4947
BU4946
BU4945
BU4944
BU4943
BU4942
BU4941
BU4940
BU4939
BU4938
BU4937
BU4936
BU4935
BU4934
BU4933
BU4932
BU4931
BU4930
BU4929
KM
KL
KK
KJ
KH
KG
KF
KE
KD
KC
KB
KA
JZ
JY
JX
JW
JV
JU
JT
JS
2.8V
2.7V
2.6V
2.5V
2.4V
2.3V
2.2V
2.1V
2.0V
1.9V
1.8V
1.7V
1.6V
1.5V
1.4V
1.3V
1.2V
1.1V
1.0V
0.9V
BU4928
BU4927
BU4926
BU4925
BU4924
BU4923
BU4922
BU4921
BU4920
BU4919
BU4918
BU4917
BU4916
BU4915
BU4914
BU4913
BU4912
BU4911
BU4910
BU4909
BU4828
BU4827
BU4826
BU4825
BU4824
BU4823
BU4822
BU4821
BU4820
BU4819
BU4818
BU4817
BU4816
BU4815
BU4814
BU4813
BU4812
BU4811
BU4810
BU4809
1/8
2009.06 - Rev.C
BU48□□G, BU48□□F, BU48□□FVE, BU49□□G, BU49□□F, BU49□□FVE series Technical Note
 Absolute maximum ratings (Ta=25°C)
Parameter
Power Supply Voltage
Nch Open Drain Output
Output Voltage
CMOS Output
*1*4
SSOP5
Power
*2*4
SOP4
Dissipation
*3*4
VSOF5
Operating Temperature
Ambient Storage Temperature
*1
*2
*3
*4
Symbol
VDD-GND
Limits
-0.3 ~ +7
GND-0.3 ~ +7
GND-0.3 ~ VDD+0.3
540
400
210
-40 ~ +125
-55 ~ +125
VOUT
Pd
Topr
Tstg
Unit
V
V
mW
°C
°C
When used at temperatures higher than Ta=25°C, the power is reduced by 5.4mW per 1°C above 25°C.
When used at temperatures higher than Ta=25°C, the power is reduced by 4.0mW per 1°C above 25°C.
When used at temperatures higher than Ta=25°C, the power is reduced by 2.1mW per 1°C above 25°C.
When a ROHM standard circuit board (70mm×70mm×1.6mm, glass epoxy board)is mounted.
 Electrical characteristics
Parameter
Symbol
Condition
BU4848
BU4847
BU4846
BU4845
BU4844
BU4843
BU4842
BU4841
BU4840
BU4839
BU4838
BU4837
BU4836
BU4835
BU4834
BU4833
BU4832
BU4831
BU4830
BU4829
BU4828
BU4827
BU4826
BU4825
BU4824
BU4823
BU4822
BU4821
BU4820
BU4819
BU4818
BU4817
BU4816
BU4815
BU4814
BU4813
BU4812
BU4811
BU4810
BU4809
VDD=HL , Ta=25°C
Detection Voltage
VDET
RL=470kΩ
Detection Voltage
Temperature Coefficient
Hysteresis Voltage
VDET/∆T
Ta=-40°C~125°C
∆VDET
VDD=LHL
Ta=-40°C~125°C
RL=470kΩ
*1
VDET≤1.0V
VDET≥1.1V
Min.
4.752
4.653
4.554
4.455
4.356
4.257
4.158
4.059
3.960
3.861
3.762
3.663
3.564
3.465
3.366
3.267
3.168
3.069
2.970
2.871
2.772
2.673
2.574
2.475
2.376
2.277
2.178
2.079
1.980
1.881
1.782
1.683
1.584
1.485
1.386
1.287
1.188
1.089
0.990
0.891
Limit
Typ.
4.800
4.700
4.600
4.500
4.400
4.300
4.200
4.100
4.000
3.900
3.800
3.700
3.600
3.500
3.400
3.300
3.200
3.100
3.000
2.900
2.800
2.700
2.600
2.500
2.400
2.300
2.200
2.100
2.000
1.900
1.800
1.700
1.600
1.500
1.400
1.300
1.200
1.100
1.000
0.900
Max.
4.848
4.747
4.646
4.545
4.444
4.343
4.242
4.141
4.040
3.939
3.838
3.737
3.636
3.535
3.434
3.333
3.232
3.131
3.030
2.929
2.828
2.727
2.626
2.525
2.424
2.323
2.222
2.121
2.020
1.919
1.818
1.717
1.616
1.515
1.414
1.313
1.212
1.111
1.010
0.909
-
±30
-
ppm/°C
VDET
×0.03
VDET
×0.03
VDET
×0.05
VDET
×0.05
VDET
×0.08
VDET
×0.07
V
Unit
V
*1 Designed Guarantee.(Outgoing inspection is not done on all products.)
*This product is not designed for protection against radioactive rays.
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2/8
2009.06 - Rev.C
BU48□□G, BU48□□F, BU48□□FVE, BU49□□G, BU49□□F, BU49□□FVE series Technical Note
 Electrical characteristics (Unless Otherwise Specified Ta=-25 to 125°C)
Parameter
Symbol
Circuit Current when ON
IDD1
Circuit Current when OFF
IDD2
Operating Voltage Range
VOPL
‘Low’ Output Current (Nch)
IOL
‘High’ Output Current (Pch)
(only BU49□□G/F/FVE)
IOH
Output Leak Current when
OFF
(only BU48□□G/F/FVE)
Ileak
Condition
VDET =0.9-1.3V
VDET =1.4-2.1V
VDET =2.2-2.7V
VDD=VDET-0.2V
VDET =2.8-3.3V
VDET =3.4-4.2V
VDET =4.3-4.8V
VDET =0.9-1.3V
VDET =1.4-2.1V
VDET =2.2-2.7V
VDD=VDET+2.0V
VDET =2.8-3.3V
VDET =3.4-4.2V
VDET =4.3-4.8V
VOL≤0.4V, Ta=25~125°C, RL=470kΩ
VOL≤0.4V, Ta=-40~25°C, RL=470kΩ
VDS=0.05V VDD=0.85V
VDS=0.5V VDD=1.5V VDET=1.7-4.8V
VDS=0.5V VDD=2.4V VDET=2.7-4.8V
VDS=0.5V VDD=4.8V VDET=0.9-3.9V
VDS=0.5V VDD=6.0V VDET=4.0-4.8V
VDD=VDS=7V
Ta=-40°C~85°C
VDD=VDS=7V
Ta=85°C~125°C
Min.
0.70
0.90
20
1.0
4.0
1.7
2.0
Limit
Typ.
0.15
0.20
0.25
0.30
0.35
0.40
0.30
0.35
0.40
0.45
0.50
0.55
100
3.3
7.2
3.4
4.0
Max.
0.88
1.05
1.23
1.40
1.58
1.75
1.40
1.58
1.75
1.93
2.10
2.28
-
-
0
0.1
-
0
1
Unit
µA
µA
V
µA
mA
mA
µA
* This product is not designed for protection against radioactive rays.
 Block Diagrams
BU48□□G/F/FVE
BU49□□G/F/FVE
VDD
VDD
VOUT
VOUT
Vref
Vref
GND
GND
Fig.1
Fig.2
TOP VIEW
TOP VIEW
SSOP5
SOP4
PIN No.
Symbol
1
VOUT
PIN No.
Symbol
Reset output
Function
1
VOUT
TOP VIEW
VSOF5
PIN No.
Symbol
Reset output
Function
1
VOUT
Function
Reset output
2
VDD
Power supply voltage
2
VDD
Power supply voltage
2
SUB
Substrate*
3
GND
GND
3
N.C.
Unconnected terminal
3
N.C.
Unconnected terminal
4
N.C.
Unconnected terminal
4
GND
GND
4
VDD
Power supply voltage
5
N.C.
Unconnected terminal
5
GND
GND
*Connect the substrate to VDD
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© 2009 ROHM Co., Ltd. All rights reserved.
3/8
2009.06 - Rev.C
BU48□□G, BU48□□F, BU48□□FVE, BU49□□G, BU49□□F, BU49□□FVE series Technical Note
 Reference Data (Unless specified otherwise, Ta=25°C)
0.5
0.4
0.3
0.2
0.1
0.0
0
1
2
3
4
5
6
7
25
【BU4816F】
4
3
VDD =6.0V
15
2
VDD =1.2V
1
0
0.0
VDD =4.8V
10
5
0
0.5
1.0
1.5
2.0
2.5
0
1
2
3
4
5
6
VDD SUPPLY VOLTAGE :VDD [V]
DRAIN-SOURCE VOLTAGE : VDS[V]
Fig.3 Circuit Current
Fig.4 “LOW” Output Current
Fig.5 “High” Output Current
1.0
4
3
2
1
0
1
2
3
4
5
6
0.8
0.6
0.4
0.2
0.0
0.0
7
VDD SUPPLY VOLTAGE :VDD [V]
0.4
0.3
0.2
0.1
0.0
-40
0
40
80
120
TEMPERATURE : Ta[℃]
Fig.9 Circuit Current when ON
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© 2009 ROHM Co., Ltd. All rights reserved.
1.5
2.0
High to low(VDET)
【BU4816F】
2.5
40
80
120
Fig.8 Detecting Voltage
Release Voltage
1.0
1.0
【BU4816F】
0.8
0.6
0.4
0.2
0.0
-40
0
TEMPERATURE : Ta[℃]
Fig.7 Operating Limit Voltage
CIRCUIT CURRENT WHEN OFF : IDD2 [μA]
【BU4816F】
1.0
1.5
VDD SUPPLY VOLTAGE : VDD [V]
Fig.6 I/O Characteristics
0.5
0.5
Low to high(VDET+ΔVDET)
1.0
-40
: V OPL [V]
5
MINIMUM OPERATING VOLTAGE
6
2.0
【BU4816F】
DETECTION VOLTAGE: VDET[V]
OUTPUT VOLTAGE: VOUT [V]
【BU4816F】
0
CIRCUIT CURRENT WHEN ON : IDD1 [μA]
【BU4916F】
20
DRAIN-SOURCE VOLTAGE : VDS[V]
7
OUTPUT VOLTAGE: VOUT [V]
5
:
【BU4816F】
"HIGH" OUTPUT CURRENT
I OH [mA]
"LOW" OUTPUT CURRENT : IOL [mA]
CIRCUIT CURRENT
: IDD [μA]
0.6
0
40
80
120
TEMPERATURE : Ta[℃]
Fig.10 Circuit Current when OFF
4/8
【BU4816F】
0.8
0.6
0.4
0.2
0.0
-40
0
40
80
120
TEMPERATURE : Ta[℃]
Fig.11 Operating Limit Voltage
2009.06 - Rev.C
BU48□□G, BU48□□F, BU48□□FVE, BU49□□G, BU49□□F, BU49□□FVE series Technical Note
 Reference Data
Examples of Output rising value(TPLH)and Output falling value(TPHL)
Part Number
TPLH[µs]
TPHL[µs]
BU4845G/F/FVE
23.3
275.9
BU4945G/F/FVE
3.5
354.3
VDD=4.3V5.1V
VDD=5.1V4.3V
* This data is for reference only.
This figure will vary with the application, so please confirm actual operation conditions before use.
 Explanation of Operation
For both the open drain type(Fig.12)and the CMOS output type(Fig.13), the detection and release voltages are
used as threshold voltages. When the voltage applied to the VDD pins reaches the applicable threshold voltage, the Vout
terminal voltage switches from either “High” to “Low” or from “Low” to “High”. Because the BU48□□G/F/FVE series uses an
open drain output type, it is possible to connect a pull-up resistor to VDD or another power supply [The output “High” voltage
(VOUT) in this case becomes VDD or the voltage of the other power supply].
VDD
VDD
VDD
R1
R1
RL
Vref
Q2
Vref
RESET
R2
R2
VOUT
R3
VOUT
Q1
R3
RESET
Q1
GND
GND
Fig.12 (BU48□□ type internal block diagram)
Fig.13 (BU49□□ type internal block diagram)
 Timing Waveforms
Example:The following shows the relationship between the input voltage VDD, the CT Terminal Voltage VCT and the output
voltage VOUT when the input power supply voltage VDD is made to sweep up and sweep down (The circuits are those in
Fig.12 and 13).
1 When the power supply is turned on, the output is unsettled
from after over the operating limit voltage (VOPL) until TPHL.
VDD
Therefore it is possible that the reset signal is not outputted
VDET+ΔVDET
when the rise time of VDD is faster than TPHL.
⑤
VDET
2 When VDD is greater than VOPL but less than the reset release
VOPL
voltage (VDET + VDET), output (VOUT) voltages will switch to L.
0V
3 If VDD exceeds the reset release voltage (VDET + VDET), then
VOUT
VOUT switches from L to H (with a delay of TPLH).
VOH
4 If VDD drops below the detection voltage (VDET) when the
TPLH
TPHL
TPLH
power supply is powered down or when there is a power supply
TPHL
fluctuation, VOUT switches to L (with a delay of TPHL).
VOL
5 The potential deference between the detection voltage and
①
③
④
②
the release voltage is known as the hysteresis width (VDET). The
system is designed such that the output does not flip-flop with
Fig.14
power supply fluctuations within this hysteresis width, preventing
malfunctions due to noise.
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5/8
2009.06 - Rev.C
BU48□□G, BU48□□F, BU48□□FVE, BU49□□G, BU49□□F, BU49□□FVE series Technical Note
 Circuit Applications
1) Examples of a common power supply detection reset circuit
VDD1
VDD2
Application examples of BU48□□G/F/FVE series
(Open Drain output type) and BU49□□G/F/FVE series
(CMOS output type) are shown below.
RL
Microcontroller
RST
BU48□□□
CIN
CL
(Capac it or for
noise filtering)
Fig.15 Open collector Output type
V DD1
CASE1:The power supply of the microcontroller (VDD2) differs
from the power supply of the reset detection (VDD1).
Use the Open Drain Output Type (BU48□□G/FVE)
attached a load resistance (RL) between the output and
V
DD2. (As shown Fig.15)
GND
CASE2:The power supply of the microcontroller (VDD1) is same
as the power supply of the reset detection (VDD1).
Use CMOS output type (BU43□□G/FVE) or Open Drain
Output Type (BU48□□G/FVE) attached a load
resistance (RL) between the output and VDD1.
Microcontroller
(As shown Fig.16)
BU49□□□
RST
When a capacitance CL for noise filtering or setting the
output delay time is connected to the Vout pin (the reset
signal input terminal of the microcontroller), please take
into account the waveform of the rise and fall of the
output voltage (Vout).
C IN
CL
(Capacitor for
nois e filtering)
GND
Fig.16 CMOS Output type
2) Examples of the power supply with resistor dividers
In applications where the power supply input terminal (VDD) of an IC with resistor dividers, it is possible that a
through-current will momentarily flow into the circuit when the output logic switches, resulting in malfunctions (such as
output oscillatory state).
(Through-current is a current that momentarily flows from the power supply (VDD) to ground (GND) when the output level
switches from “High” to “Low” or vice versa.)
Consider the use of BD48□□ when the power supply input it with resistor dividers.
V1
R2
I1
VDD
CIN
BU48□□
BU49□□
R1
VOUT
CL
GND
Fig.17
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6/8
2009.06 - Rev.C
BU48□□G, BU48□□F, BU48□□FVE, BU49□□G, BU49□□F, BU49□□FVE series Technical Note
 Operation Notes
1 . Absolute maximum range
Absolute Maximum Ratings are those values beyond which the life of a device may be destroyed. We cannot be defined the
failure mode, such as short mode or open mode. Therefore a physical security countermeasure, like fuse, is to be given
when a specific mode to be beyond absolute maximum ratings is considered.
2 . GND potential
GND terminal should be a lowest voltage potential every state.
Please make sure all pins that are over ground even if include transient feature.
3 . Electrical Characteristics
Be sure to check the electrical characteristics, that are one the tentative specification will be changed by temperature,
supply voltage, and external circuit.
4 . Bypass Capacitor for Noise Rejection
Please put into the to reject noise between VDD pin and GND with 1uF over and between VOUT pin and GND with 1000pF.
If extremely big capacitor is used, transient response might be late. Please confirm sufficiently for the point.
5 . Short Circuit between Terminal and Soldering
Don’t short-circuit between Output pin and VDD pin, Output pin and GND pin, or VDD pin and GND pin. When soldering the
IC on circuit board please is unusually cautious about the orientation and the position of the IC. When the orientation is
mistaken the IC may be destroyed.
6 . Electromagnetic Field
Mal-function may happen when the device is used in the strong electromagnetic field.
7.
The VDD line inpedance might cause oscillation because of the detection current.
8.
A VDD -GND capacitor (as close connection as possible) should be used in high VDD line impedance condition.
9.
Lower than the mininum input voltage makes the VOUT high impedance, and it must be VDD in pull up (VDD) condition.
10. Recommended value of RL Resistar is over 10kΩ (VDET=1.5V~4.8V),
over 100kΩ (VDET=0.9~1.4V).
11. This IC has extremely high impedance terminals. Small leak current due to the uncleanness of PCB surface might cause
unexpected operations. Application values in these conditions should be selected carefully. If 10MΩ leakage is assumed
between the CT terminal and the GND terminal, 1MΩ connection between the CT terminal and the VDD terminal would be
recommended. Also, if the leakage is assumed between the VOUT terminal and the GND terminal, the pull up resistor
should be less than 1/10 of the assumed leak resistance.
12. External parameters
For RL, the recommended range is 10kΩ~1MΩ. There are many factors (board layout, etc) that can affect characteristics.
Please verify and confirm using practical applications.
13. Power on reset operation
Please note that the power on reset output varies with the Vcc rise up time. Please verify the actual operation.
14. Precautions for board inspection
Connecting low-impedance capacitors to run inspections with the board may produce stress on the IC. Therefore, be
certain to use proper discharge procedure before each process of the test operation.
To prevent electrostatic accumulation and discharge in the assembly process, thoroughly ground yourself and any
equipment that could sustain ESD damage, and continue observing ESD-prevention procedures in all handing, transfer
and storage operations. Before attempting to connect components to the test setup, make certain that the power supply is
OFF. Likewise, be sure the power supply is OFF before removing any component connected to the test setup.
15. When the power supply, is turned on because of incertain cases, momentary Rash-current flow into the IC at the logic
unsettled, the couple capacitance, GND pattern of width and leading line must be considered.
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7/8
2009.06 - Rev.C
BU48□□G, BU48□□F, BU48□□FVE, BU49□□G, BU49□□F, BU49□□FVE series Technical Note
 Part Number Selection
B
U
4
8
0
BU48: Standard CMOS reset IC
Open drain type
BU49: Standard CMOS reset IC
CMOS Output type
9
Detection voltage
09: 0.9V (0.1V step)
48: 4.8V
-
G
Package
G: SSOP5
F: SOP4
FVE: VSOF5
T
R
Taping Specifications
Embossed Taping
SSOP5
<Tape and Reel information>
+6°
4° −4°
2.9±0.2
5
1
2
0.2Min.
2.8±0.2
+0.2
1.6 −0.1
4
3
Tape
Embossed carrier tape
Quantity
3000pcs
Direction
of feed
TR
The direction is the 1pin of product is at the upper right when you hold
( reel on the left hand and you pull out the tape on the right hand
1pin
+0.05
0.13 −0.03
+0.05
0.42 −0.04
0.05±0.05
1.1±0.05
1.25Max.
)
0.95
0.1
Direction of feed
Reel
(Unit : mm)
∗ Order quantity needs to be multiple of the minimum quantity.
SOP4
<Tape and Reel information>
+0.2
1.25 –0.1
2.0±0.2
+6°
4° –4°
1.3
3
2.1±0.2
0.27±0.15
4
1.05Max.
0.9±0.05
1
Tape
Embossed carrier tape
Quantity
3000pcs
Direction
of feed
TR
The direction is the 1pin of product is at the upper right when you hold
( reel on the left hand and you pull out the tape on the right hand
)
2
0.05
+0.05
0.13 –0.03
1pin
S
0.05±0.05
+0.05
0.42 –0.04
0.1
S
+0.05
0.32 –0.04
Direction of feed
Reel
(Unit : mm)
∗ Order quantity needs to be multiple of the minimum quantity.
VSOF5
<Tape and Reel information>
1.2 ± 0.05
4
(MAX 1.28 include BURR)
1.6 ± 0.05
5
0.2MAX
1.6±0.05
1.0±0.05
Tape
Embossed carrier tape
Quantity
3000pcs
Direction
of feed
TR
The direction is the 1pin of product is at the upper right when you hold
( reel on the left hand and you pull out the tape on the right hand
)
1pin
1
2
3
0.6MAX
0.13±0.05
0.5
Direction of feed
0.22±0.05
(Unit : mm)
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
Reel
8/8
∗ Order quantity needs to be multiple of the minimum quantity.
2009.06 - Rev.C
Notice
Notes
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The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
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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
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Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
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The technical information specified herein is intended only to show the typical functions of and
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© 2009 ROHM Co., Ltd. All rights reserved.
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