18個(gè)觸摸按鍵芯片原廠長輸出時(shí)間資料
VK3618I具有18個(gè)觸摸按鍵，可用來檢測外部觸摸按鍵上人手的觸摸動(dòng)作。該芯片具有較 高的集成度，僅需極少的外部組件便可實(shí)現(xiàn)觸摸按鍵的檢測。 提供了2組I2C輸出功能，1個(gè)INT中斷輸出腳，2組I2C腳和INT可并聯(lián)，每組單鍵輸出， 有效鍵對(duì)應(yīng)數(shù)據(jù)位置1。芯片內(nèi)部采用特殊的集成電路，具有高電源電壓抑制比，可減少按鍵 檢測錯(cuò)誤的發(fā)生，此特性保證在不利環(huán)境條件的應(yīng)用中芯片仍具有很高的可靠性。 此觸摸芯片具有自動(dòng)校準(zhǔn)功能，低待機(jī)電流，抗電壓波動(dòng)等特性，為各種觸摸按鍵+I2C輸 出的應(yīng)用提供了一種簡單而又有效的實(shí)現(xiàn)方法。M18+157
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? 工作電壓 2.4-5.5V ? 待機(jī)電流16uA/3.0V ? 上電復(fù)位功能（POR） ? 低壓復(fù)位功能（LVR） ? 觸摸輸出響應(yīng)時(shí)間：工作模式 48mS ，待機(jī)模式160mS ? 觸摸為2組各9通道觸摸 ? 每組單鍵輸出，有效鍵對(duì)應(yīng)數(shù)據(jù)位置1 ? 每組獨(dú)立I2C輸出+INT中斷腳 ? 防呆功能，有效鍵最長輸出時(shí)間：10S ? 無鍵觸摸4S進(jìn)入待機(jī)模式 ? 通過CS腳接對(duì)地電容調(diào)節(jié)整體靈敏度(1-47nF） ? 各觸摸通道單獨(dú)接對(duì)地小電容微調(diào)靈敏度（0-50pF）. ? 上電0.3S內(nèi)為穩(wěn)定時(shí)間，禁止觸摸 ? 上電后4S內(nèi)自校準(zhǔn)周期為64mS，4S無觸摸后自校準(zhǔn)周期為1S ? 抗電壓波動(dòng)，抗干擾性能好 ? 封裝 SSOP28(150mil) (9.9mm x 3.9mm PP=0.635mm)
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VK3618I is a touch pad detector IC which offers 18 touch key,It can detect human body contact using external touch pads. . The high level of device integration enable applications to be implemented with a minimum number of external components. It provides 2 I2C output，1 INT interrupt output pin. 2 groups of I2C pins and INT can be connected in parallel,each group single-key output, A valid key corresponds to a data bit set to 1.increasing the touch switch application reliability under adverse environmental conditions.。 With auto-calibration, low standby current, excellent resistance to voltage fluctuation and other features, this range of touch key devices provide a simple and effective means of implementing 18 touch key + IO operation in a wide variety of applications
? Operating voltage: 2.4-5.5V ? Standby current: 16uA/3.0V ? Power-On Reset（POR） ? Low Voltage Reset（LVR） ? Key Response Time：Normal Mode 48mS ，Standby Mode 160mS ? Touch is 2 groups of 9-channel touch ? No touch 4S to enter standby mode ? Each group of independent I2C output + INT interrupt pin ? Maximum key on duration time 10S ? No touch 4S to enter standby mode ? Sensitivity adjustment using an external capacitor(1-47nF）on CS pin ? Add a capacitor（0-50pF） to a touch key pin can fine tune the sensitivity for single key ? After power-on have about 0.25S stable-time, during the time do not touch the key . ? Anti-voltage fluctuation，High anti-interference ? Package SSOP28(150mil) (9.9mm x 3.9mm PP=0.635mm)
