When VCC is within nominal limits (V<" />
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  • 參數(shù)資料
    型號(hào): DS1644P-120
    廠(chǎng)商: Maxim Integrated Products
    文件頁(yè)數(shù): 11/14頁(yè)
    文件大?。?/td> 0K
    描述: IC RAM TIMEKEEP NV 120NS 34-PCM
    標(biāo)準(zhǔn)包裝: 40
    類(lèi)型: 時(shí)鐘/日歷
    特點(diǎn): 閏年,NVSRAM
    存儲(chǔ)容量: 32KB
    時(shí)間格式: HH:MM:SS(24 小時(shí))
    數(shù)據(jù)格式: YY-MM-DD-dd
    接口: 并聯(lián)
    電源電壓: 4.5 V ~ 5.5 V
    電壓 - 電源,電池: 3V
    工作溫度: 0°C ~ 70°C
    安裝類(lèi)型: 表面貼裝
    封裝/外殼: 34-PowerCap? 模塊
    供應(yīng)商設(shè)備封裝: 34-PowerCap 模塊
    包裝: 管件
    其它名稱(chēng): DS1644P120
    DS1644/DS1644P
    6 of 14
    DATA RETENTION MODE
    When VCC is within nominal limits (VCC > 4.5 volts) the DS1644 can be accessed as described above with
    read or write cycles. However, when VCC is below the power-fail point VPF (point at which write
    protection occurs) the internal clock registers and RAM are blocked from access. This is accomplished
    internally by inhibiting access via the CE signal. At this time the power-fail output signal ( PFO ) will be
    driven active low and will remain active until VCC returns to nominal levels. When VCC falls below the
    level of the internal battery supply, power input is switched from the VCC pin to the internal battery and
    clock activity, RAM, and clock data are maintained from the battery until VCC is returned to nominal
    level.
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    相關(guān)代理商/技術(shù)參數(shù)
    參數(shù)描述
    DS1644P120+ 制造商:DALLAS 制造商全稱(chēng):Dallas Semiconductor 功能描述:Nonvolatile Timekeeping RAM
    DS1644P-120+ 功能描述:實(shí)時(shí)時(shí)鐘 NV Timekeeping RAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線(xiàn)接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
    DS1644P-150 制造商:Maxim Integrated Products 功能描述:
    DS1645AB100 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:IC-1M CMOS NVRAM
    DS1645AB-100-IND 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:NVRAM (Battery Based)