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参数资料
| 型号： | DS1742W-150+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | XO, clock |
| 英文描述： | Y2KC Nonvolatile Timekeeping RAM |
| 中文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP24 |
| 封装： | 0.740 INCH, ROHS COMPLIANT, ENCAPSULATED, DIP-24 |
| 文件页数： | 13/16页 |
| 文件大小： | 272K |
| 代理商： | DS1742W-150+ |
DS1742
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BATTERY LONGEVITY
The DS1742 has a lithium power source that is designed to provide energy for clock activity,
and clock and RAM data retention when the VCC supply is not present. The capability of this
internal power supply is sufficient to power the DS1742 continuously for the life of the
equipment in which it is installed. For specification purposes, the life expectancy is 10 years at
25°C with the internal clock oscillator running in the absence of VCC power. Each DS1742 is
shipped from Dallas Semiconductor with its lithium energy source disconnected, guaranteeing
full energy capacity. When VCC is first applied at a level greater than VPF, the lithium energy
source is enabled for battery backup operation. Actual life expectancy of the DS1742 will be
much longer than 10 years since no lithium battery energy is consumed when VCC is present.
BATTERY MONITOR
The DS1742 constantly monitors the battery voltage of the internal battery. The Battery Flag bit
(bit 7) of the day register is used to indicate the voltage level range of the battery. This bit is not
writable and should always be a 1 when read. If a 0 is ever present, an exhausted lithium
energy source is indicated and both the contents of the RTC and RAM are questionable.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1743-100+ | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1743-100IND+ | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1743-85+ | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1743-85IND+ | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1743P-100+ | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1742W-150+ | 功能描述:实时时钟 Timekeeping NV RAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1743 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Y2K-Compliant, Nonvolatile Timekeeping |
| DS1743-100 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1743-100 IND | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1743-100+ | 功能描述:实时时钟 Timekeeping NV RAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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