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DS17487

Real-Time Clocks

GeneralDescription TheDS17285,DS17485,DS17885,DS17287,DS17487,andDS17887real-timeclocks(RTCs)aredesignedtobesuccessorstotheindustry-standardDS12885andDS12887.TheDS17285,DS17485,andDS17885(hereafterreferredtoastheDS17x85)provideareal-timeclock/calendar,onetim

DS17487

3V/5V Real-Time Clock

DESCRIPTION TheDS17485/DS17487arereal-timeclocks(RTC)designedassuccessorstotheindustrystandardDS1285,DS1385,DS1485,DS1585,andDS1685PCreal-timeclocks.ThesedevicesprovidetheindustrystandardDS1285clockfunctionwitheither+3Vor+5Voperation.TheDS17485alsoincorpora

DS17487

3V/5V實(shí)時時鐘; ? 集成了工業(yè)標(biāo)準(zhǔn)的DS12887 PC時鐘外加增強(qiáng)特性\n? RTC計算秒、分、時、星期、日期、月份和年，并且具有閏年補(bǔ)償，有效期至2099年\n? 可選的+3.0V或+5.0V工作電壓\n? SMI恢復(fù)堆棧\n? 64位硅序列號\n? 電源控制電路，支持系統(tǒng)通過日期/時間鬧鐘或鍵盤開啟電源\n? 晶體選擇位，允許RTC工作于6pF或12.5pF晶體\n? 12小時或24小時時鐘，具有帶AM和PM指示的12小時模式\n? 114字節(jié)通用、電池備份NV SRAM\n? 擴(kuò)展的電池備份NV SRAM\n? 2048字節(jié)(DS17285/DS17287)\n? 4096字節(jié)(DS17485/DS17487)\n? 8192字節(jié)(DS17885/DS17887)\n\n\n? RAM清除功能\n? 中斷輸出，帶6個獨(dú)立的可屏蔽中斷標(biāo)志\n? 鬧鐘可設(shè)置為每秒一次至每天一次\n? 時鐘終止刷新周期標(biāo)志\n? 可編程方波輸出\n? 自動電源失效檢測和切換電路\n? 可選擇PDIP、SO或TSOP封裝(DS17285，DS17485，DS17885)\n? 可選擇集成晶體和電池的DIP模塊封裝(DS17287，DS17487，DS17887)\n? 可選擇工業(yè)級溫度范圍\n? 通過UL認(rèn)證;

DS17285, DS17485, DS17885, DS17287, DS17487以及DS17887實(shí)時時鐘(RTC)是工業(yè)標(biāo)準(zhǔn)的DS12885和DS12887的后續(xù)產(chǎn)品。DS17285，DS17485和DS17885 (下文以DS17x85代替)提供一個實(shí)時時鐘/日歷，一個定時鬧鐘，三個可屏蔽中斷(共用一個中斷輸出)，可編程方波輸出和114字節(jié)的電池備份NV SRAM。DS17x85還集成了許多增強(qiáng)特性，例如硅序列號，電源開/關(guān)控制電路，和2K、4K或8K字節(jié)的電池備份NV SRAM。DS17287，DS17487和DS17887 (下文以DS17x87代替)在24引腳DIP模塊封裝內(nèi)集成了晶振和鋰電池。DS17x85和DS17x87的電源控制電路允許系統(tǒng)通過外部激勵開啟電源，例如鍵盤或時間和日期(喚醒)鬧鐘。/PWR輸出引腳可被任一此類事件觸發(fā)，并可用于開啟外部電源。/PWR引腳受軟件控制，以便在某個任務(wù)完成后，能夠接著關(guān)斷系統(tǒng)電源。\n\n 對于所有少于31天的月份，所有器件的日期都能夠在月末自動調(diào)整，并帶有閏年補(bǔ)償。該器件可配置為24小時或12小時格式，并且?guī)в蠥M/PM指示。精確的溫度補(bǔ)償電路用于監(jiān)控VCC。一旦檢測到主電源失效，器件可以自動切換到備用電源。鈕扣式鋰電池可以連接到DS17x85的VBAT輸入引腳，在主電源掉電時保持有效的時間和日期。DS17x85和DS17x87還包括了VBAUX輸入，用于電源輔助功能，例如/PWR控制。該器件通過一個復(fù)用的、字節(jié)寬度接口訪問。\n\n \n\n

DS17487

Real-Time Clocks

DS17487-3

3V/5V Real-Time Clock

DESCRIPTION TheDS17485/DS17487arereal-timeclocks(RTC)designedassuccessorstotheindustrystandardDS1285,DS1385,DS1485,DS1585,andDS1685PCreal-timeclocks.ThesedevicesprovidetheindustrystandardDS1285clockfunctionwitheither+3Vor+5Voperation.TheDS17485alsoincorpora

DS17487-3

Real-Time Clocks

GeneralDescription TheDS17285,DS17485,DS17885,DS17287,DS17487,andDS17887real-timeclocks(RTCs)aredesignedtobesuccessorstotheindustry-standardDS12885andDS12887.TheDS17285,DS17485,andDS17885(hereafterreferredtoastheDS17x85)provideareal-timeclock/calendar,onetim

DS17487-3IND

Real-Time Clocks

GeneralDescription TheDS17285,DS17485,DS17885,DS17287,DS17487,andDS17887real-timeclocks(RTCs)aredesignedtobesuccessorstotheindustry-standardDS12885andDS12887.TheDS17285,DS17485,andDS17885(hereafterreferredtoastheDS17x85)provideareal-timeclock/calendar,onetim

DS17487-5

3V/5V Real-Time Clock

DESCRIPTION TheDS17485/DS17487arereal-timeclocks(RTC)designedassuccessorstotheindustrystandardDS1285,DS1385,DS1485,DS1585,andDS1685PCreal-timeclocks.ThesedevicesprovidetheindustrystandardDS1285clockfunctionwitheither+3Vor+5Voperation.TheDS17485alsoincorpora

DS17487-5

Real-Time Clocks

GeneralDescription TheDS17285,DS17485,DS17885,DS17287,DS17487,andDS17887real-timeclocks(RTCs)aredesignedtobesuccessorstotheindustry-standardDS12885andDS12887.TheDS17285,DS17485,andDS17885(hereafterreferredtoastheDS17x85)provideareal-timeclock/calendar,onetim

DS17487-5IND

Real-Time Clocks

GeneralDescription TheDS17285,DS17485,DS17885,DS17287,DS17487,andDS17887real-timeclocks(RTCs)aredesignedtobesuccessorstotheindustry-standardDS12885andDS12887.TheDS17285,DS17485,andDS17885(hereafterreferredtoastheDS17x85)provideareal-timeclock/calendar,onetim