Audio Accessory ICs for Mobile Devices Voice/Audio Mixer & Selector IC No.10087EAT02 BU7831KN ●Description BU7831KN is the sound path selector which include 3 stereo inputs, Stereo headphone amp, 600Ω driver amp, and 2stereooutputs. Each output have a mixer and an attenuator, you can set the variable audio path setting. The variable audio source can connect to Headphone and speaker through this LSI. ●Feature 1) It has 3stereo inputs. 2) It has analog mixer on each input. 3) It matches for the application used the Headphone because it has 16Ω audio driver. 4) 16Ω driver has the pop-noise less function. 5) The attenuator of 16Ω driver has soft changing and muting function. 6) It has 600Ω driver for external output. 7) It included stereo output for stereo speaker. 8) VQFN20 small package ●Applications It is for portable equipments with audio player. ●Absolute maximum ratings Parameter Symbol Ratings Unit VDD -0.3～4.5 V Pd 530 *1 mW Operating temperature range Topr -30～+85 ℃ Storage temperature range Tstg -55～+125 ℃ Supply voltage Power dissipation *1 Reduce by 5.3 mW/ ℃ over 25 ℃ ●Recommended operating range Parameter Supply voltage www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Symbol VDD Ratings Min. Typ. Max. 2.5 3.0 3.3 1/16 Unit V 2010.09 - Rev.A Technical Note BU7831KN ●Electric Characteristics Unless otherwise specified, ・Analog Part Ta=25 ℃,AVDD=DVDD=3.0V Parameter Symbol Limits Min. Typ. Max. Unit Conditions Stand-by current Istb - - 3 µA Stand-by mode Operation current 1 Idd1 - 0.26 0.42 mA BIAS part. No signal Operation current 2 Idd2 - 2.3 3.7 mA ST1R, ST1L to HPR, HPL Exclude Idd1, No signal Total harmonic distortion 1 (HPL, HPR) THDhp1 - 0.05 0.5 % Output power 1(HPL, HPR) PO1 - 10 - mW THD=10%, RL=16Ω Output Noise Voltage 1 (HPL, HPR) VNO - -94 -80 dBV JIS A weighting Maximum output level 1 (SPL, SPR) VOMAX1 2.0 - - Vp-p THD≦1%, RL=10kΩ Maximum output level 2 (EXTO) VOMAX2 2.0 - - Vp-p THD≦1%, RL=600Ω Vo=-10dBV, 20kHzL PF ・Digital input (DC) Parameter Symbol Limits Min. Typ. Max. Unit Input L level voltage VIL - - 0.7 V Input H level voltage VIH 2.1 - - V Input current IIN - - ±2 µA Conditions 0V, 3V force ・CPU interface Parameter Symbol Limits Min. Typ. Max. Unit Cycle Time tcyc 250 - - ns Input Data Hold Time tdh 50 - - ns Input Data Setup Time tds 50 - - ns Chip Select Setup Time tcs 50 - - ns Chip Select Hold Time tch 50 - - ns www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 2/16 Conditions 2010.09 - Rev.A Technical Note BU7831KN ●Reference Data (Unless otherwise specified, Ta=25 ℃,AVDD=DVDD=3.0V) 10 0.8 0.6 0.4 0.2 CIRCUIT CURRENT : ICC(mA) 10 CIRCUIT CURRENT : ICC(mA) STAND BY CURRENT : Ist(μA) 1.0 8 6 4 2 2.0 2.5 3.0 3.5 4.0 6 4 2 0 0 0.0 8 2.0 4.5 2.5 3.0 3.5 4.0 2.0 4.5 Fig.1 Stand-by current Fig.2 Operation current At Headphone AMP part 10.00 10.00 EXTO : THD+N (%) 10.00 HPR : THD+N (%) 100.00 HPL : THD+N (%) 100.00 1.00 1.00 0.10 0.10 0.01 0.01 -80 -60 -40 -20 0 INPUT LEVEL : VIN (dBV) Fig.4 Total harmonic Distortion (HPL) 10.00 4.5 0.10 -80 -60 -40 -20 0 -100 -80 -60 -40 -20 0 INPUT LEVEL : VIN (dBV) Fig.5 Total Harmonic Distortion (HPR) 10.00 4.0 1.00 INPUT LEVEL : VIN (dBV) 100.00 3.5 0.01 -100 100.00 3.0 Fig.3 Operation current Of All blocks 100.00 -100 2.5 SUPPLY VOLTAGE : VDD(V) SUPPLY VOLTAGE : VDD(V) SUPPLY VOLTAGE : VDD(V) Fig.6 Total Harmonic Distortion (EXTO) 20 1.00 0.10 HPL : LINEARITY (dBV) SPR : THD+N (%) SPL : THD+N (%) 0 1.00 0.10 -20 -40 -60 -80 0.01 0.01 -100 -80 -60 -40 -20 -100 -100 0 -60 -40 -20 0 -100 INPUT LEVEL : VIN (dBV) INPUT LEVEL : VIN (dBV) Fig.7 Total Harmonic Distortion (SPL) 20 0 0 0 -60 -80 SPL : LINEARITY (dBV) 20 -40 -20 -40 -60 -80 -100 -80 -60 -40 -20 0 INPUT LEVEL : VIN (dBV) Fig.10 Linearity (HPR) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. -40 -20 0 -20 -40 -60 -80 -100 -100 -60 Fig.9 Linearity (HPL) 20 -20 -80 INPUT LEVEL : VIN (dBV) Fig.8 Total Harmonic Distortion (SPR) EXTO : LINEARITY (dBV) HPR : LINEARITY (dBV) -80 -100 -100 -80 -60 -40 -20 0 INPUT LEVEL : VIN (dBV) Fig.11 Linearity (EXTO) 3/16 -100 -80 -60 -40 -20 0 INPUT LEVEL : VIN (dBV) Fig.12 Linearity (SPL) 2010.09 - Rev.A Technical Note BU7831KN -20 Noise [dBV] SPR : LINEARITY (dBV) 0 -40 -60 -80 -70 -70 -75 -75 -80 -80 -85 -85 Noise [dBV] 20 -90 -95 -100 -80 -60 -40 -20 -100 -105 -105 2.0 0 2.5 3.0 3.5 4.0 -110 4.5 2.0 SUPLLY VOLTAGE : VDD(V) INPUT LEVEL : VIN (dBV) -75 -80 -80 -80 -85 -85 -85 Noise [dBV] -70 -75 Noise [dBV] -70 -75 -95 -90 -95 -100 -105 -105 -105 -110 -110 3.0 3.5 4.0 4.5 SUPLLY VOLTAGE : VDD(V) Fig.16 Output Noise (EXTO) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 4.0 4.5 -95 -100 2.5 3.5 -90 -100 2.0 3.0 Fig.15 Output Noise (HPR) -70 -90 2.5 SUPPLY VOLTAGE : VDD(V) Fig.14 Output Noise (HPL) Fig.13 Linearity (SPR) Noise [dBV] -95 -100 -110 -100 -90 -110 2.0 2.5 3.0 3.5 4.0 4.5 SUPLLY VOLTAGE : VDD(V) Fig.17 Output Noise (SPL) 4/16 2.0 2.5 3.0 3.5 4.0 4.5 SUPLLY VOLTAGE : VDD(V) Fig.18 Output Noise (SPR) 2010.09 - Rev.A Technical Note BU7831KN ●Block Diagram, Recommended application circuit, Pin assign 2.5～3.3V + VDD VSS ST1L Other Source ATT1L ST1R PCM CODEC Stereo Tuner － ＋ ATT4L MIXSEL 0～ ‐28dB 2dBstep 0～‐28dB 2dBstep 1 Stereo Speaker Amp ATT1R MIXSEL2 0～ ‐28dB 2dBstep ST2L － ＋ ATT4R ATT2L 0/ ‐6dB MIXSEL3 ST2R － ＋ ATT5 0～ ‐28dB 2dBstep MIXSEL4 ST3L External 600Ω 0/ ‐6dB ＋ － ATT6L 16Ω 0/ ‐6dB ST3R MIXSEL5 ATT3R ATT6R + 100 µF StereoHeadPhone 16Ω 100 µF + HPR 0～‐28dB 2dBstep 0/ ‐6dB Serial Control BIAS CVCOM ＋ － EXTO HPL 0～ ‐28dB 2dBstep ATT3L Stereo SPR 0～ ‐28dB 2dBstep ATT2R Melody SPL CSTEP NRST SCLK SDATA NCS CSTART + 1 µF 1 µF 4.7 µF RESET CPU I/F CPU Fig.19 Application circuit example VDD VSS HPR CSTEP 15 14 13 12 CVCOM 11 10 ST3L HPL 16 9 ST3R CSTART 17 BU7831KN EXTO 18 8 ST2L SPR 19 SPL 20 1 2 3 4 5 SCLK SDATA NCS NRST ST1R 7 ST2R 6 ST1L Fig.20 Pin Assign www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 5/16 2010.09 - Rev.A Technical Note BU7831KN ●Input terminal equivalent circuit diagram 100kΩ(TYP) PAD PAD B A SCLK, SDATA, NCS, NRST C ST2R, ST2L, ST3R, ST3L CSTEP PAD PAD PAD D ST1R, ST1L PAD E VSS, VDD F CVCOM, CSTART PAD G HPR, HPL, EXTO, SPR, SPL About Digital input (Type A): When you will have possibility to give Hi-z for input pin, You must select from the under heads for protect the pin floated. a) Pull down with less than 10kohm b) Pull up c) Give “L” signal just before Hi-Z. Fig.21 Equivalent circuit diagram No. Name 1 SCLK 2 Function No. Name Serial clock input of CPU I/F 11 CVCOM Reference voltage SDATA Serial data input of CPU I/F 12 CSTEP Connect capacitor for blocking pop-noise 3 NCS Chip select input of CPU I/F 13 HPR Headphone R channel output 4 NRST Reset input L=Reset 14 VSS Ground 5 ST1R Stereo 1 input for R channel 15 VDD Power supply 6 ST1L Stereo 1 input for L channel 16 HPL Headphone L channel output 7 ST2R Stereo 2 input for R channel 17 CSTART 8 ST2L Stereo 2 input for L channel 18 EXTO 9 ST3R Stereo 3 input for R channel 19 SPR Speaker R channel output 10 ST3L Stereo 3 input for L channel 20 SPL Speaker L channel output www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 6/16 Function Connect capacitor for blocking start up pop-noise 600Ω driver output 2010.09 - Rev.A Technical Note BU7831KN ●Detail explanation of each function blocks ・Reference Voltage (Bias part) The reference voltage occurrence part that decides the operating point of a group of internal amplifiers is the following. CVCOM_OUT, CSTART_OUT, all is about 1/2VDD[V], and therefore the level of internal signal becomes about 1/2VDD[V], too. CVCOM has a pre-charge function, and it is possible to shorten of rising time of the bias in ON. (As for the CVCOM, ON/OFF of the pre-charge function is possible with a register bit.) CSTART terminal is used as a reference voltage of the output amplifier of the headphone, and it included pop sound low stage function in headphone path ON/ OFF, too. Capacitor value with the outside in the figure is recommended to make the PSRR character of both standard voltages the same. Choose the thing whose character is good in Capacitor with the outside because it becomes the reference voltage of the internal circuit. Pre charge CVCOM 4.7μF 30k CVCOM_OUT To the one except for the headphone amplifier output step 30k Pre charge CSTART 1μF 140k CSTART_OUT To the headphone amplifier output step 140k Fig.22 CVCOM, CSTRT equivalent circuit ・Analog input part The following is about each analog. Input. Please use the coupling capacitor with the outside in consideration of frequency characteristic of input. Input DC level is about 1/2VDD[V]. Input impedance on off (input non-choice) becomes Hi-z. When an input terminal isn’t used (when an input path isn’t set up) is open, and there is no problem. But, be careful that noise from the outside and so on doesn’t turn because it becomes Hi-z. When it is anxious, pull-down in about 100kΩ. ST1L and ST1R inputs change input impedance by setting of ATT1L and ATT1R respectively. ST1L(R) input impedance ATT1 L (R) setting 200kΩ(TYP) 0dB setting 400kΩ(TYP) Mute setting ST1L 200k 200k ST1R CVCOM_OUT 100k ST2L ST2R ST3L ST3R 100k 100k CVCOM_OUT Fig.23 Input pins equivalent circui www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 7/16 2010.09 - Rev.A Technical Note BU7831KN ・Analog output part The following is about Analog output part (EXTO, SPL, SPR, HPL, HPR). Each output amplifier is linked path select (MIXER1～5). Because stereo output is presumed, HPL and HPR are turned ON/OFF at the same time, and with pop sound decrease function. MIXER1 At the time of path choice SPL output amplifier ON MIXER2 At the time of path choice SPR output amplifier ON MIXER3 At the time of path choice EXTO output amplifier ON MIXER4 or MIXER5 At the time of path choice HPL, HPR output amplifier ON Be careful that noise from the outside and so on doesn't turn because it becomes Hi-z though the output that isn’t used is open and there is no problem. When it is anxious, pull-down in about 100kΩ. Output Port Output impedance (DC) At ON Output impedance (DC) At OFF EXTO 1.4Ω Hi-z SPL SPR 2.2Ω Hi-z HPL 1.5Ω HPR 0.6Ω GND short ・Attenuator Each attenuator has 16 steps (4bit), which contains mute. ATT6L and ATT6R that is attenuator of the headphone output has soft mute that decreases pop sound in switching. (ATT1 - 5 don't have this function.) The amount of software depends on a capacitor to connect to the CSTEP terminal. Decide the value of a capacitor to connect to the CSTEP terminal after you take pop volume and delay time into consideration because a fixed number becomes the bottom mostly at the time of that switching. ATT setting ATT ATT Mute HP output Thsmute Thsmute Thsmute=200×103 ×CSTEP [S] Fig.24 ・Analog path part About the internal pass circuit, the circuit that it has a path setting by the register turns it on. For example, when MIXSEL*_0 is chosen with either ATT, ST1R input is chosen, and a group of input amplifiers of ST1R turns it on. And a connected output amplifier is turned on when either input is chosen with MIXSEL* in the same way to the output circuit. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 8/16 2010.09 - Rev.A Technical Note BU7831KN ・Pop sound decrease circuit at the time of head phone output ON/ OFF It has the function that decreases pop sound that occurs at the time of ON/ OFF of the headphone output (HPL and HPR). When headphone output is chosen/non-chosen, it is the function that the DC output of the headphone output goes down smoothly on falling/rising. Rising time is decided by the capacitor value that it is connected to the CSTART terminal. Falling time is decided by the CSTART terminal and the coupling capacitor. Pop sound decreases as much as to be here if rising/falling is smooth. Decide the value of a capacitor to connect to the CSTART terminal after you take pop sound, rising/falling time into consideration because a fixed number becomes the bottom mostly at the time of that switching. And do settlement of timing in consideration of this time when you make it turn ON/OFF by the continuance. Pop sound is made when it switches in the middle of the descent of rising/falling. Headphone ON/OFF Headphone Output (DC) Thpout Thpout=80.6×103×CSTART[S] Fig.25 ・Digital part Input such as clock, data is to input "H" or "L" properly about each digital input terminal to contain at the time of standing by as well. If you turn off the power (When Hi-z is input), a control side is to avoid an input terminal's becoming open in either following method It has the possibility that penetration electric current occurs because it becomes the input which isn't fixed as BU7831KN when it isn't avoided. a） Terminal, in less than 10kΩ, pull-down b） Terminal, pull-up c） When it becomes input Hi-z, "L" is given to it. ・CPU interface NCS tch tcyc tcs SCLK tdh tds SDATA A7 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 Fig.26 SDATA will be confirmed by 16th clock that is inputted after NCS falling edge, and then serial data reflect to internal register by NCS falling edge. The data format is 16bit rear. CPU I/F is 1Byte=16bit. Because it doesn't cope with continuous data transmission, you must surely insert the section of NCS= "H" between 1st Byte and 2nd Byte. The following the is to secure time beyond the SCLK 1 clock. (th≧tcyc) th NCS SCL SDATA Fig.27 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 9/16 2010.09 - Rev.A Technical Note BU7831KN Using in the BU7831KN dedicated line is recommended with a CPU I/F. Control it by a sequence like the bottom when you don't do special control. NCS CPU SCLK BU7831KN SDATA Other IC NCS_OTH Fig.28 CPU I/F input signals waveforms NCS NCS_OTH SCLK SDATA BU7831KN Control Other IC Control BU7831KN Control Fig.29 Please NCS of BU7831KN is set “H” when you control the other IC. When NCS is "H", the register of BU7831KN can't write it. note ) NCS_OTH is based on the specifications of other IC's. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 10/16 2010.09 - Rev.A Technical Note BU7831KN ●Recommended operation sequence VDD ON NRST=L start. Rise up VDD first. After the mode setting, input the audio signal. VDD NRST CPU I/F Mode Set Audio Signal Analog Signal Fig. 30 VDD OFF HPRST=0(82h=00h) is taken at the time of use of HPAMP first. VDD OFF, after the mute on setting(88h=FFh), NRST=L at using HPAMP. VDD OFF, after NRST=L at not using HPAMP. HPRST(82h) 01h 00h ATT6L,R(88h) XXh FFh NRST VDD Headphone output Fig. 31 HPAMP ON Mute OFF (HPRST 82h bit0), after the mode setting. CPU I/F Mode Set Headphone output(DC) HPRST (82h bit0) Thpout Thsmute Fig. 32 ・HPAMP OUTPUT rise time setting up expression Thpout = 80.6 × 103 × CSTART [s] (typ) ・HSMUTE delay time setting up expression Thsmute = 200 × 103 × CSTEP [s] (typ) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 11/16 2010.09 - Rev.A Technical Note BU7831KN HPAMP OFF HPRST=0(82h bit0) is set up first. Other setups are canceled after ATT6L, R is set up in the mute(88h=ffh). HPRST (82h bit0) ATT6L,R (88h bit7-0) FFh XXh CPU I/F Path lifting Headphone output Thsmute Fig. 33 HPAMP Volume Control As the mute time is set by capacitor connected CSTEP pin,Volume control it is set after enough time. The delay time is as same as Thsmute. Volume control bit Headphone output Thsmute Thsmute Fig. 34 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 12/16 2010.09 - Rev.A Technical Note BU7831KN Mode Setting Flow Power Supply ON Power Supply OFF Reference Voltage ON (VCOM=1) Stand-by mode RESET (NRST=0 or VCOM=0) INPUT Path setting MIXING Path setting *1 Analog Power OFF (PDN=0) Analog Power ON (PDN=1) *2 HPAMP MUTE ON (Using HPAMP) (ATT6=FFh) HPAMP RESET lifting (Using HPAMP) HPAMP RESET setting (Using HPAMP) (HPRST=0) OUTPUT *1 : When the analog path setting is not changed. (Repeat output) *2 : When the Power supply OFF, after output. Fig. 35 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 13/16 2010.09 - Rev.A Technical Note BU7831KN ●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) Operating conditions Characteristics are guaranteed under the conditions of each specified parameter. 3) Reverse polarity connection of the power supply 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. 4) Power supply line 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, note that capacitance characteristic values are reduced at low temperatures. 5) GND voltage GND potential should maintain at the minimum ground voltage level. Furthermore, no terminals should be lower than the GND potential voltage including electric transients. 6) Short circuit between terminals and GND or other devices Pay attention to the assembly direction of the ICs. Wrong mounting direction or shorts between terminals to GND, or other components on the circuits, can damage the IC. 7) Operation in a strong electromagnetic field Using the ICs in a strong electromagnetic field can cause operation malfunction. 8) Inspection with set PCB During testing, turn on or off the power before mounting or dismounting the board from the test board. Do not power up the board without waiting for the output capacitors to discharge. The capacitors in the low output impedance terminal can stress the device. Pay attention to the electro static voltages during IC handling, transportation, and storage. 9) 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 breakdown of the input terminal. Therefore, pay thorough attention not to apply a voltage lower than the GND to the input terminals. 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 a voltage lower than the power supply voltage to the input terminals, or a voltage within the guaranteed value of electrical characteristics. 10) Ground wiring patterns The power supply and ground lines must be as short and thick as possible to reduce line impedance. Fluctuating voltage on the power ground line may damage the device. 11) External capacitor When using external ceramic capacitors, consider degradation in the nominal capacitance value due to DC bias and changes in the capacitance with temperature. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 14/16 2010.09 - Rev.A Technical Note BU7831KN ●Power Dissipation 700 Power Dissipation : Pd （mW) 600 530mW 500 400 300 200 100 0 0 25 50 75 100 125 150 Ambient Temperature : Ta(℃) This value is the measurement value that was mounted on the PCB by ROHM Material : Grass epoxy Size : 70mm×70mm×1.6mm Fig.36 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 15/16 2010.09 - Rev.A Technical Note BU7831KN ●Ordering part number B U 7 Part No. 8 3 1 K Part No. 7831 N - E Package KN : VQFN20 2 Packaging and forming specification E2: Embossed tape and reel VQFN20 15 11 16 6 20 M +0.1 0.6 −0.3 0.95MAX 0.05 0.22±0.05 0.22±0.05 Tape Embossed carrier tape (with dry pack) Quantity 2500pcs Direction of feed 5 +0.03 0.02 −0.02 1 4.2±0.1 4.0±0.1 10 4.0±0.1 4.2±0.1 <Tape and Reel information> 4.2±0.1 4.0±0.1 (1.1) E2 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 ) 0.05 .3 (0 3− (0 .2 2) ) 5) .5 (0 0.5 Notice : Do not use the dotted line area for soldering www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1pin Reel (Unit : mm) 16/16 Direction of feed ∗ Order quantity needs to be multiple of the minimum quantity. 2010.09 - 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