Rohm BH1721FVC Digital 16bit serial output type ambient light sensor ic Datasheet

Ambient Light Sensor IC Series
Digital 16bit Serial Output Type
Ambient Light Sensor IC
BH1721FVC
No.10046EAT10
●Descriptions
2
BH1721FVC is an digital Ambient Light Sensor IC for I C bus interface. This IC is the most suitable to obtain the ambient
light data for adjusting LCD and Keypad backlight power of Mobile phone. It is possible to detect wide range at High
resolution. ( 1 - 65528 lx ).
●Features
2
1) I C bus Interface ( f / s Mode Support, Slave Address : "0100011" )
2) Spectral responsibility is approximately human eye response
3) Illuminance to Digital Converter
4) Wide range and High resolution. (1 – 65528 lx )
5) Low Current by power down function
6) 50Hz / 60Hz Light noise reject-function
7) 1.8V Logic input interface
8) No need any external parts
9) Light source dependency is little. (ex. Incandescent Lamp. Fluorescent Lamp. Halogen Lamp. White LED. Sun Light)
10) Small measurement variation (+/- 15%)
11) Compact surface mount package 1.6 x 1.6 x 0.55 mm
●Applications
Mobile phone, LCD TV, NOTE PC, Portable game machine, Digital camera, Digital video camera, Car navigation, PDA,
LCD display
●Absolute Maximum Ratings
Parameter
Symbol
Limits
Units
Supply Voltage
Vmax
4.5
V
Operating Temperature
Topr
-40~85
℃
Storage Temperature
Tstg
-40~100
℃
SDA Sink Current
Imax
7
mA
Power Dissipation
Pd
165※
mW
※70mm × 70mm × 1.6mm glass epoxy board. Derating in done at 2.2mW/℃ for operating above Ta=25℃.
●Operating Conditions
Parameter
Symbol
Min.
Typ.
Max.
Units
Vcc
2.4
3.0
3.6
V
VDVI
1.65
-
VCC
V
VCC Voltage
2
I C Reference Voltage
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1/15
2010.02 - Rev.A
BH1721FVC
Technical Note
●Electrical Characteristics ( VCC = 3.0V, DVI = 3.0V, Ta = 25℃, unless otherwise noted )
Parameter
Units Conditions
Symbol
Min.
Typ.
Max.
Supply Current
Icc1
-
140
199
µA
Ev = 100 lx
Powerdown Current
Icc2
-
0.01
1.0
µA
No input Light
Peak Wave Length
λp
-
560
-
nm
Measurement Accuracy
S/A
1.02
1.2
1.38
times
Dark ( 0 lx ) Sensor out
S0
0
0
2
H-Resolution Mode Resolution
rHR
-
1
-
lx
L-Resolution Mode Resolution
rLR
-
8
-
lx
H-Resolution Mode Measurement Time
tHR
-
120
180
ms
L-Resolution Mode Measurement Time
tLR
-
16
24
ms
Incandescent / Fluorescent Sensor out ratio
rIF
-
1
-
DVI Input ‘L’ Voltage
VDVL
-
-
0.4
V
SCL, SDA Input ‘H’ Voltage 1
VIH1
0.7 * DVI
-
-
V
DVI ≧ 1.8V
SCL, SDA Input ‘H’ Voltage 2
VIH2
1.26
-
-
V
1.65V ≦ DVI < 1.8V
SCL, SDA Input ‘L’ Voltage 1
VIL1
-
-
0.3 * DVI
V
DVI ≧ 1.8V
SCL, SDA Input ‘L’ Voltage 2
VIL2
-
-
DVI – 1.26
V
1.65V ≦ DVI < 1.8V
SCL, SDA, Input ‘H’ Current
IIH
-
-
10
µA
SCL, SDA, Input ‘L’ Current
IIL
-
-
10
µA
I2C SCL Clock Frequency
fSCL
-
-
400
kHz
I2C Bus Free Time
tBUF
1.3
-
-
µs
I2C Hold Time ( repeated ) START Condition
tHDSTA
0.6
-
-
µs
I2C Set up time for a Repeated START Condition
tSUSTA
0.6
-
-
µs
I2C Set up time for a Repeated STOP Condition
tSUSTO
0.6
-
-
µs
I2C Data Hold Time
tHDDAT
0
-
-
µs
I2C Data Valid Time
tVDDAT
-
-
0.9
µs
I2C Data Valid Acknowledge Time
tVDACK
-
-
0.9
µs
I2C Data Setup Time
tSUDAT
100
-
-
ns
I2C ‘L’ Period of the SCL Clock
tLOW
1.3
-
-
µs
I2C ‘H’ Period of the SCL Clock
tHIGH
0.6
-
-
µs
VOL
0
-
0.4
V
I2C SDA Output ‘L’ Voltage
※1
Sensor out / Actual lx
EV = 1000 lx ※1, ※2
count H-Resolution Mode
※3
times EV = 1000 lx
IOL = 3 mA
※1 White LED is used as optical source.
※2 Measurement Accuracy typical value is possible to change '1' by "Measurement result adjustment function".
※3 Use H-Resolution Mode if dark data ( less than 20 lx ) is need.
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2/15
2010.02 - Rev.A
BH1721FVC
Technical Note
●Reference Data
100000
64
1.2
56
Ratio
0.8
0.6
0.4
10000
48
Measurement Result
Measurement Result
1.0
40
32
H-Res.
24
16
L-Res.
0.2
1000
100
10
8
0.0
400
500
600
700
800
900
1000
0
1100
0
Wavelength [ nm ]
8
16
24
32
40
Illuminance [ lx ]
48
56
1
1.2
1
0.8
+
Ratio
+
0.6
-
0.6
1pin
-
0.4
0.4
-
+
0.2
6
4
2
+
0.2
H-Res.
+
0
0
-90
-60
-30
0
30
60
0
90
-90
-60
-30
Angle [ deg ]
0
30
60
90
-40
1.2
0
Fig.5 Directional Characteristics 2
60
80
100
Fig.6 Dark Response
ICC @ Measurement
0.8
Halogen Light
0.6
Kripton Light
Artifical Sun
Light
0.2
40
200
Incandescent
Light
0.4
20
Ta [ ℃ ]
Fluorescent Light
1
Ratio
-20
Angle [ deg ]
Fig.4 Directional Characteristics 1
10000 100000
8
Measurement Result
-
1000
10
1pin
0.8
100
Fig.3 Illuminance Measuremnet Result 2
1.2
1
10
Illuminance [ lx ]
Fig.2 Illuminance Measurement Result 1
Fig.1 Spectral Response
Ratio
1
64
150
100
50
White LED
0
0
-40
-20
0
20
40
60
80
100
0
Ta [ ℃ ]
1
Ratio
1.5
2
2
Fig.8 Light Source Dependency
(Fluorescent Light is set to ‘1’)
Fig.7 Measurement Result
Temperature Dependency
2.5
VCC=3V
0.8
Ratio
Ratio
0.8
0.6
0.2
0.2
0
0
-40
-20
0
20
40
60
80
100
Ta [ ℃ ]
Fig.10 VCC – ICC@0 lx
(POWER DOWN)
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0.6
0.4
0.4
0.01
4
1
DVI=1.8V
0.1
3.5
1.2
1
1
3
VCC [ V ]
Fig.9 VCC – ICC
(During measurement)
1.2
10
ICC @ POWER DOWN [ uA ]
0.5
2
2.5
3
3.5
VCC [ V ]
Fig.11 Measurement Result
VCC Dependency
3/15
4
1.5
2
2.5
3
3.5
DVI [ V ]
Fig.12 Measurement Result
DVI Dependency
2010.02 - Rev.A
BH1721FVC
Technical Note
●Block Diagram
DVI
VCC
AMP
ADC
Logic
+
I C Interface
2
SCL
SDA
PD
OSC
GND
●Block Diagram Descriptions
・PD
Photo diode with approximately human eye response.
・AMP
Integration-OPAMP for converting from PD current to Voltage.
・ADC
AD converter for obtainment Digital 16bit data.
2
・Logic + I C Interface
Ambient Light Calculation and I2C BUS Interface. It is including below register.
Data Register → This is for registration of Ambient Light Data. Initial Value is "0000_0000_0000_0000".
Measurement Time Register → This is for registration of measurement time. Initial Value is "01_0010_1100".
・OSC
Internal Oscillator. It is CLK for internal logic.
●Measurement Procedure
Power supply
Initial state is Power Down mode after
VCC and DVI supply.
Power Down
Power On
Measurement command
State Transition by I2C write-command.
Automatically State Transition
Continuous measurement
* "Power On" Command is possible to omit.
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4/15
2010.02 - Rev.A
BH1721FVC
Technical Note
●Instruction Set Architecture
Instruction
Opecode
Comments
Power Down
0000_0000
No active state.
Power On
0000_0001
Waiting for measurement command.
Continuously Auto-Resolution Mode
0001_0000
0010_0000
Switch measurement mode automatically by illuminance.
Continuously H-Resolution Mode
0001_0010
0010_0010
Start measurement at 1lx resolution.
Measurement Time is typically 120ms.
Continuously L-Resolution Mode
0001_0011
0001_0110
0010_0011
0010_0110
Start measurement at 8lx resolution.
Measurement Time is typically 16ms.
Change Measurement time
( High bit )
010_MT[9,8,7,6,5]
Change Masurement time
( Low bit )
011_MT[4]_XXXX
Change measurement time.
※ Please refer "adjust measurement result for influence of optical window."
Change measurement time.
※ Please refer "adjust measurement result for influence of optical window."
※ Don't input the other opecode.
●Measurement mode explanation
Measurement Mode
Measurement Time.
H-Resolution Mode
L-Resolution Mode
Measurement Range.
Resolution
Typ. 120ms
0 - 8191 lx
1 lx
Typ. 16ms
0 - 65528 lx
8 lx
We recommend to use H-Resolution Mode.
Measurement time (integration time) of H-Resolution Mode is so long that some kind of noise (including in 50Hz / 60Hz
noise) is rejected. And H-Resolution Mode is 1 lx resolution so that it is suitable for darkness (less than 20 lx)
Auto-Resolution mode selects measurement mode automatically. It is determined after 16ms (typ.) passes from
measurement start. If BH1721FVC judges that current illuminance is more than 4000 lx, then Data is output at L-resolution
mode, else Data is output after 120ms(typ.) from measurement start at H-resolution mode. Please refer below flow chart.
Start
after 16ms.(typ.)
Select mode
Lux <= 4000
Lux > 4000
DATA output at L-resolution mode
Data output at H-resolution mode after
120ms passes from measurement start.
Auto-Resolution mode measurement
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5/15
2010.02 - Rev.A
BH1721FVC
Technical Note
●Timing chart for VCC and DVI power supply sequence
DVI is I2C bus reference voltage terminal. And it is also asynchronous reset terminal. It is necessary to set to ‘L’ after VCC is
supplied. In DVI 'L' term, internal state is set to Power Down mode.
1) Recommended Timing chart1 for VCC and DVI supply.
VCC
DVI
Reset Term (more than 1µs)
2) Timing chart2 for VCC and DVI supply.
(If DVI rises within 1µs after VCC supply)
VCC
DVI
Reset Term (more than 1µs)
Don't care state
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6/15
2010.02 - Rev.A
BH1721FVC
Technical Note
●Measurement sequence example from "Write instruction" to "Read measurement result"
ex1) Continuously Auto-resolution mode
from Slave to Master
from Master to Slave
① Send "Continuously Auto-resolution mode " instruction
ST
0100011
② Wait to complete 1st
0
Ack
00010000
Ack
SP
Auto-resolution mode measurement.( max. 180ms )
③ Read measurement result.
ST
0100011
1
Ack
Low Byte [ 7:0 ]
High Byte [ 15:8 ]
Ack
Ack
SP
How to calculate when the data High Byte is "10000011" and Low Byte is "10010000"
15
9
8
7
4
( 2 + 2 + 2 + 2 + 2 ) / 1.2 ≒ 28067 [ lx ]
The result of continuously measurement mode is updated.
ex2) Continuously L-resolution mode
① Send " Continuously L-resolution mode " instruction
ST
0100011
0
Ack
00010011
Ack
SP
② Wait to complete L-resolution mode measurement.( max. 24ms )
③ Read measurement result
ST
0100011
1
Ack
Low Byte [ 7:0 ]
High Byte [ 15:8 ]
Ack
Ack
SP
How to calculate when the data High Byte is "00000001" and Low Byte is "00010000"
8
4
( 2 + 2 ) / 1.2 ≒ 227 [ lx ]
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7/15
2010.02 - Rev.A
BH1721FVC
Technical Note
●Application circuit example of DVI terminal
The DVI terminal is an asynchronous reset terminal. Please note that there is a possibility that IC doesn't operate normally if
the reset section is not installed after the start-up of VCC.
(Please refer to the paragraph of "Timing chart for VCC and DVI power supply sequence”)
The description concerning SDA and the terminal SCL is omitted in this application circuit example. Please design the
2
application the standard of the I C bus as it finishes being satisfactory.
ex 1) The control signal line such as CPU is connected.
BH1721FVC
VCC SCL
0.1µF
Micro
Controller
GND
0.1µF
SDA
DVI
0.1µF
ex 2) Reset IC is used.
1, For Reset IC of the Push-Pull type
BH1721FVC
VCC SCL
0.1µF
RESET
GND
0.1µF
SDA
DVI
Reset IC( Push-Pull type )
0.1µF
2, For Reset IC of the Open drain output
BH1721FVC
VCC SCL
0.1µF
1kΩ
RESET
GND
0.1µF
SDA
DVI
Reset IC( Open drain type )
0.1µF
ex 3) A different power supply is used.
BH1721FVC
VCC SCL
0.1µF
V1
GND
0.1µF
SDA
DVI
V2
0.1µF
※ Power supply of DVI must stand up later than power supply of VCC stand up, because it is necessary to secure reset section ( 1µs or more ).
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8/15
2010.02 - Rev.A
BH1721FVC
Technical Note
ex 4) LPF using CR is inserted between VCC and DVI.
This method has the possibility that the Reset section of turning on the power supply can not satisfied. Cannot be
satisfied. Please design the set considering the characteristic of the power supply enough.
R1 : 1kΩ
BH1721FVC
VCC SCL
0.1µF
GND
0.1µF
SDA
DVI
C1 : 1µF
◆ Notes when CR is inserted between VCC and DVI
※Please note that there is a possibility that reset section ( 1µs ) can not be satisfied because the power supply is turned on when the rise time of VCC is slow
※When VCC is turned off, the DVI voltage becomes higher than VCC voltage but IC destruction is not occred if recommended constant
( R1 = 1kΩ, C1 = 1µF ) is used.
※Please note that there is a possibility that Reset section (1µsec) cannot be satisfied if wait time is not enough long after turning off VCC.
(It is necessary to consider DVI voltage level after turning off VCC.)
t1
VCC
t2
DVI
2.4V
0.4V
0V
Reset Section: 1µs or more
* Please do the application design to secure Reset section 1µs or more after the reclosing of the power supply.
◆ Example of designing set when CR ( C = 1µF, R = 1kΩ ) is inserted between VCC and DVI with VCC=2.8V
①The rise time to 0→2.4V of VCC must use the power supply of 100µs or less.
②Please wait 25ms or more after VCC turn off ( VCC <= 0.05V ), because it is necessary to secure reset section
(1µs or more).
Rise time of power supply: 100µs or less
Time to power supply reclosing: 25ms or more
VCC
DVI
2.8V
2.4V
0.4V
0V
0V
0.05V
Reset Section: 1µs or more
* Please do the application design to secure Reset section 1µs or more after the reclosing of the power supply.
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9/15
2010.02 - Rev.A
BH1721FVC
Technical Note
●I2C Bus Access
1 ) I2C Bus Interface Timing chart
2
Write measurement command and Read measurement result are done by I C Bus interface. Please refer the formally
2
specification of I C Bus interface, and follow the formally timing chart.
SDA
tSU ; DAT
tr
tf
tf
tHD ; STA
HD
tLOW
tr
tBUF
SCL
tSU ; STA
tHD ; STA
S
tSU;STO
Sr
tHIGH
t
tHD ; DAT
P
S
2 ) Write Format
BH1721FVC is not able to accept plural command without stop condition. Please insert SP every 1 Opecode.
ST
Slave Address
"0100011"
R/W
0
Ack
Slave Address
"0100011"
R/W
1
Ack
Opecode
Ack
SP
3 ) Read Format
ST
27
26
Low Byte [7:0]
25 24 23 22
15
2
21
20
High Byte [15:8]
214 213 212 211 210 29 28
Ack
Ack
SP
from Slave to Master
from Master to Slave
ex )
High Byte = "1000_0011"
Low Byte = "1001_0000"
15
9
8
7
4
( 2 + 2 + 2 + 2 + 2 ) / 1.2 ≒ 28067 [ lx ]
* Please refer formality I2C bus specification of NXP semiconductors.
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10/15
2010.02 - Rev.A
BH1721FVC
Technical Note
●Adjust measurement result for influence of optical window. (sensor sensitivity adjusting )
BH1721FVC is possible to change sensor sensitivity. And it is possible to cancel the optical window influence (difference with
/ without optical window) by using this function. Adjust is done by changing measurement time. For example, when
transmission rate of optical window is 50% (measurement result becomes 0.5 times if optical window is set), influence of
optical window is ignored by changing sensor sensitivity from default to 2 times
Sensor sensitivity is shift by changing the value of MTreg (measurement time register). MTreg value has to set 2 times if
target of sensor sensitivity is 2 times. Measurement time is also set 2 times when MTreg value is changed from default to 2
2
times. Low 4bit value is fixed”1100”. Please change high 6bit value of this register via to I C Bus interface.
ex) Procedure for changing target sensor sensitivity to 2 times.
Please change Mtreg from”01_0010_1100” (default) to”10_0101_1100” (default * 2).
1) Changing High bit of Mtreg
Slave Address
ST
R/W
0
Ack
010_10010
Ack
SP
R/W
0
Ack
011_1XXXX
Ack
SP
2) Changing Low bit of Mtreg
Slave Address
ST
* X value is ignore.
3) Input Measurement Command.
Slave Address
ST
R/W
0
Ack
0001_0000
Ack
SP
* This example is High Resolution mode, but it accepts the other measurement.
4) After about 240ms, measurement result is registered to Data Register. (High Resolution mode is typically 120ms, but
measurement time is set twice. )
The below table is seeing the changeable range of MTreg.
Min.
changeable
range of MTreg
Typ.
Max.
binary
00_1000_1100
( sensitivity : default * 0.47 )
01_0010_1100
default
11_1111_1100
( sensitivity : default * 3.40 )
decimal
140
( sensitivity : default * 0.47 )
300
default
1020
( sensitivity : default * 3.40 )
It is possible to detect 0.25lx by using this function at H-resolution mode.
The below formula is to calculate illuminance per 1 count.
Illuminance per 1 count (lx / count) = 1 / 1.2 *(300 / X)
1.2 : Measurement accuracy
300 : Default value of MTreg ( dec )
X : MTreg value
The below table is seeing the detail of resolution.
MTreg value
lx / count
00_1000_1100
1.79
01_0010_1100
0.83
11_1111_1100
0.25
Please input the opecode at PowerDown state to change Mtreg.There is a possibility of malfunctioning when the opecode to
change Mtreg is input while the illuminance measurement is going .
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11/15
2010.02 - Rev.A
BH1721FVC
Technical Note
●Terminal Description
PIN
Terminal Name
No.
Equivalent Circuit
Function
1
VCC
Power Supply Terminal
2
GND
GND Terminal
3
SDA
2
I C bus Interface SDA Terminal
4
DVI
SDA, SCL Reference Voltage Terminal
And DVI Terminal is also asynchronous Reset
for internal registers.So that please set to 'L'
( at least 1µs, DVI <= 0.4V ) after VCC is
supplied. BH1721FVC is pulled down by 150kΩ
while DVI = 'L'.
5
SCL
150kΩ
2
I C bus Interface SCL Terminal
※These values are design-value, not guaranteed.
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12/15
2010.02 - Rev.A
BH1721FVC
Technical Note
●Package Outlines
A
E
Production
code
Lot No.
WSOF5 (Unit: mm)
●Optical design for the device
0.8 mm
0.6 mm
Min.0.4 mm
Min.0.4 mm
PD area (0.25 mm x 0.3 mm)
Please design an optical window to have the focused
light within this area.
Min.0.4 mm
Min.0.4 mm
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13/15
2010.02 - Rev.A
BH1721FVC
Technical Note
●Notes for use
1) Absolute Maximum Ratings
An excess in the absolute maximum ratings, such as supply voltage ( Vmax ), temperature range of operating conditions
(Topr), etc., can break down devices, thus making impossible to identify breaking mode such as a short circuit or an open
circuit. If any special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take
physical safety measures including the use of fuses, etc.
2) GND voltage
Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state.
Furthermore, check to be sure no terminals are at a potential lower than the GND voltage including an actual electric
transient.
3) Short circuit between terminals and erroneous mounting
In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can
break down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between terminals or between
the terminal and the power supply or the GND terminal, the ICs can break down.
4) Operation in strong electromagnetic field
Be noted that using ICs in the strong electromagnetic field can malfunction them.
5) Inspection with set PCB
On the inspection with the set PCB, if a capacitor is connected to a low-impedance IC terminal, the IC can suffer stress.
Therefore, be sure to discharge from the set PCB by each process. Furthermore, in order to mount or dismount the set
PCB to/from the jig for the inspection process, be sure to turn OFF the power supply and then mount the set PCB to the jig.
After the completion of the inspection, be sure to turn OFF the power supply and then dismount it from the jig. In addition,
for protection against static electricity, establish a ground for the assembly process and pay thorough attention to the
transportation and the storage of the set PCB.
6) Input terminals
In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the
parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the
input terminal. Therefore, pay thorough attention not to handle the input terminals; such as to apply to the input terminals a
voltage lower than the GND respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage to
the input terminals when no power supply voltage is applied to the IC. In addition, even if the power supply voltage is
applied, apply to the input terminals a voltage lower than the power supply voltage or within the guaranteed value of
electrical characteristics.
7) Thermal design
Perform thermal design in which there are adequate margins by taking into account the power dissipation ( Pd ) in actual
states of use.
8) Treatment of package
Dusts or scratch on the photo detector may affect the optical characteristics. Please handle it with care.
9) Rush current
When power is first supplied to the CMOS IC, it is possible that the internal logic may be unstable and rush current may
flow instantaneously. Therefore, give special consideration to power coupling capacitance, power wiring, width of GND
wiring, and routing of connections.
10) The exposed central pad on the back side of the package
There is an exposed central pad on the back side of the package. Please mount by Footprint dimensions described in the
Jisso Information for WSOF5. This pad is GND level, therefore there is a possibility that LSI malfunctions and
heavy-current is generated.
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14/15
2010.02 - Rev.A
BH1721FVC
Technical Note
●Ordering part number
B
H
1
Part No.
7
2
1
F
Part No.
V
C
Package
FVC: WSOF5
-
T
R
Packaging and forming specification
TR: Embossed tape and reel
WSOF5
Quantity
3000pcs
4
4
(0.91)
5
0.2MAX
Embossed carrier tape
(0.3)
(0.05)
Tape
1.0±0.05
5
(0.41)
1.6±0.05
(0.8)
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
)
3 2 1
1 2 3
1pin
0.13±0.05
S
+0.03
0.02 −0.02
0.6MAX
1.2±0.05
(MAX 1.28 include BURR)
<Tape and Reel information>
1.6±0.05
0.1
S
0.5
0.22±0.05
0.08
Direction of feed
M
(Unit : mm)
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© 2010 ROHM Co., Ltd. All rights reserved.
Reel
15/15
∗ Order quantity needs to be multiple of the minimum quantity.
2010.02 - Rev.A
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
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
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
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 specified 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 specified 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 specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specified 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, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire 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, fuelcontroller 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 specified 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.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
R1010A
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