Datasheet. Capacitive Controller ICs Capacitive Switch Controller IC BU21077MUV

Transcription

1 atasheet apacitive ontroller Is apacitive witch ontroller I BU77MUV General escription BU77MUV is a capacitive switch controller for switch operation. BU77MUV has programmable MPU and it control the sensing sequence and how to use value of sensor. It is possible to reduce operational current with devising a sensing sequence. ey pecifications Input Voltage ange.7 to.v Operating emperature ange - to +8 Package VQFNV. mm. mm. mm Features Programmable MPU 8 apacitive ensor Ports -ire erial Bus Interface ingle Power upply Built-in Power-On-eset and Oscillator pplications Portable evice such as mart Phone, P. Electronic evice with Multi witches Information ppliance such as Projector V ppliance such as igital V, H ecorder P / P Peripheral Equipment such as Laptop P ypical pplication ircuit N IN IN IN N IN IN IN IN.uF.uF V V BU77MUV IN7 E V B V V N L IN.7kΩ V.7kΩ MΩ HO.uF Figure. ypical pplication ircuit 〇 Product structure : ilicon monolithic integrated circuit 〇 his product has no designed protection against radioactive rays OHM o., Ltd. ll rights reserved. Z-LLF8-- / Z.Jul. ev.

2 BU77MUV Pin onfigurations N IN IN IN N IN IN V V B BU77MUV OP VIE IN IN IN7 E IN V V N L Pin escriptions Figure. Pin onfigurations Pin No. Pin Name I/O Functions Note Power Initial ondition I/O Equivalent ircuit V Power Power V Ground Ground N L In Host-I/F L pin V Hi-Z b InOut Host-I/F pin V Hi-Z b IN Out Interrupt output V Hi-Z b 7 E In est input Fix L at the normal operation V Hi-Z c 8 IN7 InOut ensor 7 V Hi-Z a 9 IN InOut ensor V Hi-Z a IN InOut ensor V Hi-Z a N IN InOut ensor V Hi-Z a IN InOut ensor V Hi-Z a IN InOut ensor V Hi-Z a N IN InOut ensor V Hi-Z a 7 IN InOut ensor V Hi-Z a 8 V Power LO output for analog blocks V Power LO output for digital blocks B In eset bar input ctive L V Hi-Z c I/O Equivalent ircuits V V V IN IN I P I P P I OEN OEN Figure. I/O Equivalent ircuit (a) Figure. I/O Equivalent ircuit (b) Figure. I/O Equivalent ircuit (c) OHM o., Ltd. ll rights reserved. Z / Z-LLF8--.Jul. ev.

3 BU77MUV Block iagram V LO V VEF LO V PO O LOGI FE MPU FE ontrol / onverter /V onverter ensor FE IN* B E PM M L HO I/F IN V Figure. Block iagram escription of Blocks ensor FE, /V onverter onvert from capacitance to voltage for each sensor. / onverter onvert from analog value to digital value. LO.V output LO for ensor FE, /V onverter, and / converter. LO.V output LO for O and Logic blocks. O Oscillator. PO Power-On-eset for system reset. MPU ontrol sensor and sequence by program. PM 8kbyte Program M of MPU. It needs to download program from host. M orking M for MPU. HO I/F -wire serial bus interface compatible with I protocol. FE ontrol ontrol sequencer for ensor FE, /V onverter, and / onverter. atchdog timer reset. It issues a reset when the MPU is hang-upped. OHM o., Ltd. ll rights reserved. Z / Z-LLF8--.Jul. ev.

4 BU77MUV bsolute Maximum atings (a = ) Parameter ymbol ating Unit Power upply Voltage V -. to +7. V Input Voltage V IN -. to V +. V Operating emperature ange opr - to +8 torage emperature ange stg - to + Power issipation P d. (Note ) Maximum Junction emperature jmax (Note ) erate by.m/ when operating above a= (mounted in -layer mm board with.mm surface capper area) P d of I is.7 and derate by.7m/ when operating above a=. aution: Operating the I over the absolute maximum ratings may damage the I. he damage can either be a short circuit between pins or an open circuit between pins and the internal circuitry. herefore, it is important to consider circuit protection measures, such as adding a fuse, in case the I is operated over the absolute maximum ratings. ecommended Operating ondition (a = - to +8 ) Parameter ymbol ating Unit Power upply Voltage V.7 to. V Electrical haracteristics (a =, V =.V, V = V) Parameter ymbol Min yp Max Unit onditions Input High Voltage V IH V x.7 - V +. V Input Low Voltage V IL V -. - V x. V Output High Voltage V OH V -. - V V I OH = -m Output Low Voltage V OL V - V +. V I OL = +m O Frequency f O MHz O Frequency f O. 7.8 khz V Voltage V V... V V Voltage V V... V OHM o., Ltd. ll rights reserved. Z / Z-LLF8--.Jul. ev.

5 BU77MUV Host Interface BU77MUV has -wire serial bus interface. It is compatible with I protocol and BU77MUV is a slave device. lave address of BU77MUV is h (hown 7-bit). nd it supports tandard-mode ( Hz) and Fast-mode ( khz). It has sequential read for reduce access time. L P ddress / ata ata N / OP Figure 7. -wire erial Bus Interface ata Format t H; t U; t H; t BUF t LO L condition t H; t HIGH t U; repeated condition Figure 8. -wire erial Bus Interface iming hart t U;O OP condition condition Parameter ymbol tandard-mode Fast-mode Min Max Min Max Unit L lock Frequency f L khz Hold ime for ( epeated ) ondition t H; μs Low Period of L t LO μs High Period of L t HIGH μs ata Hold ime t H;....9 μs ata etup ime t U; μs etup ime for epeated tart ondition t U; μs etup ime for OP ondition t U;O μs Bus Free ime Between OP and ondition t BUF μs OHM o., Ltd. ll rights reserved. Z / Z-LLF8--.Jul. ev.

6 / BU77MUV Z-LLF8-- OHM o., Ltd. ll rights reserved..jul. ev. Z 7 7 lave ddress =x I E O P egister ddress (n) rite ata to egister (egister ddress =n) Byte rite 7 lave ddress =x I E N O P egister ddress (n) lave ddress =x andom ead 7 ead ata from egister (egister ddress =n) E 7 lave ddress =x I E egister ddress (n) lave ddress =x equential ead 7 ead ata from egister (egister ddress =n) E 7 7 ead ata from egister (egister ddress =n+x) N O P : lave ddress : egister ddress : ead ata : rite ata Figure 9. -wire erial Bus Protocol

7 BU77MUV Power on equence he power supply pin is only V. V and V are generated by built-in LO, these are not necessary to supply from external. hen the voltage level of B change form low to High after V supplying, LO is wakeup and V voltage is raised. nd built-in power on reset (PO) circuit release the system reset and host interface is enable fter V voltage reach the normal voltage range. B pin can not need to be controlled by host and connects to the V, because the BU77MUV has PO circuit. If the B pin is connected to the V, the system reset is release automatically after V supplying. ecommended Value of External apacitors.uf ecoupling capacitor for V.uF ecoupling capacitor for V.uF ecoupling capacitor for V V V V V BU77MUV V GN Figure. rrangement of External apacitors V V B B V V Power On eset Power On eset Figure. Power on equence (ontrolled B) Figure. Power on equence (V horted B) OHM o., Ltd. ll rights reserved. Z 7/ Z-LLF8--.Jul. ev.

8 BU77MUV Operational Notes. everse onnection of Power upply onnecting the power supply in reverse polarity can damage the I. ake precautions against reverse polarity when connecting the power supply, such as mounting an external diode between the power supply and the I s power supply terminals.. Power upply Lines esign the PB layout pattern to provide low impedance supply lines. eparate the ground and supply lines of the digital and analog blocks to prevent noise in the ground and supply lines of the digital block from affecting the analog block. Furthermore, connect a capacitor to ground at all power supply pins. onsider the effect of temperature and aging on the capacitance value when using electrolytic capacitors.. Ground Voltage Ensure that no pins are at a voltage below that of the ground pin at any time, even during transient condition.. Ground iring Pattern hen using both small-signal and large-current ground traces, the two ground traces should be routed separately but connected to a single ground at the reference point of the application board to avoid fluctuations in the small-signal ground caused by large currents. lso ensure that the ground traces of external components do not cause variations on the ground voltage. he ground lines must be as short and thick as possible to reduce line impedance.. hermal onsideration hould by any chance the power dissipation rating be exceeded the rise in temperature of the chip may result in deterioration of the properties of the chip. he absolute maximum rating of the Pd stated in this specification is when the I is mounted on a 7.mm x 7.mm x.mm glass epoxy board with.mm copper areas. In case of exceeding this absolute maximum rating, increase the board size and copper area to prevent exceeding the Pd rating.. ecommended Operating onditions hese conditions represent a range within which the expected characteristics of the I can be approximately obtained. he electrical characteristics are guaranteed under the conditions of each parameter. 7. ush urrent hen power is first supplied to the I, it is possible that the internal logic may be unstable and inrush current may flow instantaneously due to the internal powering sequence and delays, especially if the I has more than one power supply. herefore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and routing of connections. 8. Operation Under trong Electromagnetic Field Operating the I in the presence of a strong electromagnetic field may cause the I to malfunction. 9. esting on pplication Boards hen testing the I on an application board, connecting a capacitor directly to a low-impedance output pin may subject the I to stress. lways discharge capacitors completely after each process or step. he I s power supply should always be turned off completely before connecting or removing it from the test setup during the inspection process. o prevent damage from static discharge, ground the I during assembly and use similar precautions during transport and storage.. Inter-pin hort and Mounting Errors Ensure that the direction and position are correct when mounting the I on the PB. Incorrect mounting may result in damaging the I. void nearby pins being shorted to each other especially to ground, power supply and output pin. Inter-pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment) and unintentional solder bridge deposited in between pins during assembly to name a few. OHM o., Ltd. ll rights reserved. Z 8/ Z-LLF8--.Jul. ev.

9 BU77MUV Operational Notes continued. Unused Input erminals Input terminals of an I are often connected to the gate of a MO transistor. he gate has extremely high impedance and extremely low capacitance. If left unconnected, the electric field from the outside can easily charge it. he small charge acquired in this way is enough to produce a significant effect on the conduction through the transistor and cause unexpected operation of the I. o unless otherwise specified, unused input terminals should be connected to the power supply or ground line.. egarding the Input Pin of the I In the construction of this I, P-N junctions are inevitably formed creating parasitic diodes or transistors. he operation of these parasitic elements can result in mutual interference among circuits, operational faults, or physical damage. herefore, conditions which cause these parasitic elements to operate, such as applying a voltage to an input pin lower than the ground voltage should be avoided. Furthermore, do not apply a voltage to the input terminals when no power supply voltage is applied to the I. Even if the power supply voltage is applied, make sure that the input terminals have voltages within the values specified in the electrical characteristics of this I.. eramic apacitor hen using a ceramic capacitor, determine the dielectric constant considering the change of capacitance with temperature and the decrease in nominal capacitance due to bias and others. OHM o., Ltd. ll rights reserved. Z 9/ Z-LLF8--.Jul. ev.

10 BU77MUV Ordering Information B U 7 7 M U V - E Part Number Package MUV: VQFNV Packaging and forming specification E: Embossed tape and reel Marking iagram VQFNV (OP VIE) Part Number Marking B U 77 LO Number PIN M OHM o., Ltd. ll rights reserved. Z / Z-LLF8--.Jul. ev.

11 BU77MUV Physical imension, ape and eel Information Package Name VQFNV OHM o., Ltd. ll rights reserved. Z / Z-LLF8--.Jul. ev.

12 BU77MUV evision History ate evision hanges 9.ug. New elease.jul. P orrect clerical error (old) MUP (new) MPU P7 orrect recommended value of decoupling capacitor for V (old).uf (new).uf OHM o., Ltd. ll rights reserved. Z / Z-LLF8--.Jul. ev.

13 Notice Precaution on using OHM Products. Our Products are designed and manufactured for application in ordinary electronic equipments (such as V equipment, O equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you intend to use our Products in devices requiring extremely high reliability (such as medical equipment (Note ), transport equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property ( pecific pplications ), please consult with the OHM sales representative in advance. Unless otherwise agreed in writing by OHM in advance, OHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any OHM s Products for pecific pplications. (Note) Medical Equipment lassification of the pecific pplications JPN U EU HIN LⅢ LⅡb LⅢ LⅢ LⅣ LⅢ. OHM designs and manufactures its Products subject to strict quality control system. However, semiconductor products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which a failure or malfunction of our Products may cause. he following are examples of safety measures: [a] Installation of protection circuits or other protective devices to improve system safety [b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure. Our Products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditions, as exemplified below. ccordingly, OHM shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of any OHM s Products under any special or extraordinary environments or conditions. If you intend to use our Products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents [b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust [c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including l, H, NH, O, and NO [d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves [e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items [f] ealing or coating our Products with resin or other coating materials [g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of flux is recommended); or ashing our Products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] Use of the Products in places subject to dew condensation. he Products are not subject to radiation-proof design.. Please verify and confirm characteristics of the final or mounted products in using the Products.. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied, confirmation of performance characteristics after on-board mounting is strongly recommended. void applying power exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect product performance and reliability. 7. e-rate Power issipation depending on ambient temperature. hen used in sealed area, confirm that it is the use in the range that does not exceed the maximum junction temperature. 8. onfirm that operation temperature is within the specified range described in the product specification. 9. OHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in this document. Precaution for Mounting / ircuit board design. hen a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product performance and reliability.. In principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method must be used on a through hole mount products. If the flow soldering method is preferred on a surface-mount products, please consult with the OHM representative in advance. For details, please refer to OHM Mounting specification Notice-PG-E OHM o., Ltd. ll rights reserved. ev.

14 Precautions egarding pplication Examples and External ircuits. If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the characteristics of the Products and external components, including transient characteristics, as well as static characteristics.. You agree that application notes, reference designs, and associated data and information contained in this document are presented only as guidance for Products use. herefore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. OHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. Precaution for Electrostatic his Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron, isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control). Precaution for torage / ransportation. Product performance and soldered connections may deteriorate if the Products are stored in the places where: [a] the Products are exposed to sea winds or corrosive gases, including l, H, NH, O, and NO [b] the temperature or humidity exceeds those recommended by OHM [c] the Products are exposed to direct sunshine or condensation [d] the Products are exposed to high Electrostatic. Even under OHM recommended storage condition, solderability of products out of recommended storage time period may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is exceeding the recommended storage time period.. tore / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads may occur due to excessive stress applied when dropping of a carton.. Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of which storage time is exceeding the recommended storage time period. Precaution for Product Label two-dimensional barcode printed on OHM Products label is for OHM s internal use only. Precaution for isposition hen disposing Products please dispose them properly using an authorized industry waste company. Precaution for Foreign Exchange and Foreign rade act ince concerned goods might be fallen under listed items of export control prescribed by Foreign exchange and Foreign trade act, please consult with OHM in case of export. Precaution egarding Intellectual Property ights. ll information and data including but not limited to application example contained in this document is for reference only. OHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data.. OHM shall not have any obligations where the claims, actions or demands arising from the combination of the Products with other articles such as components, circuits, systems or external equipment (including software).. No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of OHM or any third parties with respect to the Products or the information contained in this document. Provided, however, that OHM will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to manufacture or sell products containing the Products, subject to the terms and conditions herein. Other Precaution. his document may not be reprinted or reproduced, in whole or in part, without prior written consent of OHM.. he Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of OHM.. In no event shall you use in any way whatsoever the Products and the related technical information contained in the Products or this document for any military purposes, including but not limited to, the development of mass-destruction weapons.. he proper names of companies or products described in this document are trademarks or registered trademarks of OHM, its affiliated companies or third parties. Notice-PG-E OHM o., Ltd. ll rights reserved. ev.

15 atasheet General Precaution. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents. OHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny OHM s Products against warning, caution or note contained in this document.. ll information contained in this docume nt is current as of the issuing date and subj ect to change without any prior notice. Before purchasing or using OHM s Products, please confirm the la test information with a OHM sale s representative.. he information contained in this doc ument is provi ded on an as is basis and OHM does not warrant that all information contained in this document is accurate an d/or error-free. OHM shall not be in an y way responsible or liable for any damages, expenses or losses incurred by you or third parties resulting from inaccuracy or errors of or concerning such information. Notice E OHM o., Ltd. ll rights reserved. ev.

16 atasheet BU77MUV - eb Page istribution Inventory Part Number BU77MUV Package VQFNV Unit Quantity Minimum Package Quantity Packing ype aping onstitution Materials List inquiry oh Yes