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ADM694

Microprocessor Supervisory Circuits

GENERALDESCRIPTION TheADM690–ADM695familyofsupervisorycircuitsofferscompletesinglechipsolutionsforpowersupplymonitoringandbatterycontrolfunctionsinmicroprocessorsystems.ThesefunctionsincludeμPreset,backupbatteryswitchover,watchdogtimer,CMOSRAMwriteprotection,a

ADM694

Microprocessor Supervisory Circuits

GENERALDESCRIPTION TheADM690–ADM695familyofsupervisorycircuitsofferscompletesinglechipsolutionsforpowersupplymonitoringandbatterycontrolfunctionsinmicroprocessorsystems.ThesefunctionsincludeμPreset,backupbatteryswitchover,watchdogtimer,CMOSRAMwriteprotection,a

ADM694

微處理器電源監(jiān)控器，內(nèi)置備用電池切換、看門狗、電源故障警告、低電平有效復(fù)位功能及4.65V閾值電壓、100MA輸出電流特性; ? 出眾的MAX690–MAX695升級產(chǎn)品\n\n? 可以在整個(gè)溫度范圍內(nèi)工作\n\n? 低功耗：5 mW\n\n? 精密電壓監(jiān)控器\n\n? 復(fù)位置位低至 1 V VCC\n\n? 低開關(guān)導(dǎo)通電阻：1.5 Ω（正常），20 Ω（備用）;

ADM690至ADM695系列監(jiān)控電路均為完整的單芯片解決方案，可實(shí)現(xiàn)微處理器系統(tǒng)中的電源監(jiān)控和電池控制功能。這些功能包括微處理器復(fù)位、備用電池切換、看門狗定時(shí)器、CMOS RAM寫保護(hù)和電源故障警告。該完整系列器件提供各種配置，可滿足大多數(shù)微處理器系統(tǒng)的要求。\n\nADM690、ADM692和ADM694均采用8引腳DIP封裝，并提供以下功能： 啟動(dòng)、關(guān)斷和掉電情況下的上電復(fù)位輸出。即使VCC低至1 V，。RESET 輸出仍然可以工作。CMOS RAM、CMOS微處理器或其它低功耗邏輯的備用電池切換。如果可選的看門狗定時(shí)器在指定時(shí)間內(nèi)未切換，則提供復(fù)位脈沖。1.3 V閾值檢測器，用于電源故障警告、低電池電量檢測或+5 V以外電源的監(jiān)控。\n\nADM691、ADM693和ADM695均采用16引腳DIP及小形集成封裝，同時(shí)還提供以下三個(gè)額外功能： CMOS RAM或EEPROM的寫保護(hù)。可調(diào)復(fù)位周期與可調(diào)看門狗超時(shí)周期。獨(dú)立的看門狗超時(shí)、備用電池切換功能和低VCC狀態(tài)輸出。 ADM690至ADM695系列采用先進(jìn)的外延CMOS工藝制造，集低功耗(5 mW)、極快芯片使能選通(5 ns)和高可靠性于一體。即使VCC低至1 V，仍能保證RESET置位。此外，電源切換電路經(jīng)過特別設(shè)計(jì)，壓降可降至最低，因而無需外部調(diào)整管也可以驅(qū)動(dòng)最高達(dá)100 mA的輸出電流。

ADM694AN

Microprocessor Supervisory Circuits

GENERALDESCRIPTION TheADM690–ADM695familyofsupervisorycircuitsofferscompletesinglechipsolutionsforpowersupplymonitoringandbatterycontrolfunctionsinmicroprocessorsystems.ThesefunctionsincludeμPreset,backupbatteryswitchover,watchdogtimer,CMOSRAMwriteprotection,a

ADM694AN

Microprocessor Supervisory Circuits

GENERALDESCRIPTION TheADM690–ADM695familyofsupervisorycircuitsofferscompletesinglechipsolutionsforpowersupplymonitoringandbatterycontrolfunctionsinmicroprocessorsystems.ThesefunctionsincludeμPreset,backupbatteryswitchover,watchdogtimer,CMOSRAMwriteprotection,a

ADM694AN

Microprocessor Supervisory Circuits

GENERALDESCRIPTION TheADM690–ADM695familyofsupervisorycircuitsofferscompletesinglechipsolutionsforpowersupplymonitoringandbatterycontrolfunctionsinmicroprocessorsystems.ThesefunctionsincludeμPreset,backupbatteryswitchover,watchdogtimer,CMOSRAMwriteprotection,a

ADM694AN

Microprocessor Supervisory Circuits

GENERALDESCRIPTION TheADM690–ADM695familyofsupervisorycircuitsofferscompletesinglechipsolutionsforpowersupplymonitoringandbatterycontrolfunctionsinmicroprocessorsystems.ThesefunctionsincludeμPreset,backupbatteryswitchover,watchdogtimer,CMOSRAMwriteprotection,a

ADM694AN

Microprocessor Supervisory Circuits

GENERALDESCRIPTION TheADM690–ADM695familyofsupervisorycircuitsofferscompletesinglechipsolutionsforpowersupplymonitoringandbatterycontrolfunctionsinmicroprocessorsystems.ThesefunctionsincludeμPreset,backupbatteryswitchover,watchdogtimer,CMOSRAMwriteprotection,a

ADM694AQ

Microprocessor Supervisory Circuits

GENERALDESCRIPTION TheADM690–ADM695familyofsupervisorycircuitsofferscompletesinglechipsolutionsforpowersupplymonitoringandbatterycontrolfunctionsinmicroprocessorsystems.ThesefunctionsincludeμPreset,backupbatteryswitchover,watchdogtimer,CMOSRAMwriteprotection,a

ADM694AQ

Microprocessor Supervisory Circuits

GENERALDESCRIPTION TheADM690–ADM695familyofsupervisorycircuitsofferscompletesinglechipsolutionsforpowersupplymonitoringandbatterycontrolfunctionsinmicroprocessorsystems.ThesefunctionsincludeμPreset,backupbatteryswitchover,watchdogtimer,CMOSRAMwriteprotection,a