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| 型号： | DS1251Y-70+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 18/20页 |
| 文件大小： | 0K |
| 描述： | IC NVSRAM 4MBIT 70NS 32DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 11 |
| 类型： | Phantom 计时芯片 |
| 特点： | 闰年，NVSRAM |
| 存储容量： | 512KB |
| 时间格式： | HH:MM:SS:hh（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 并联 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 32-DIP 模块（0.600"，15.24mm） |
| 供应商设备封装： | 32-EDIP |
| 包装： | 管件 |
DS1251/DS1251P
7 of 20
BATTERY LONGEVITY
The DS1251 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 DS1251 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 DS1251 is shipped from Maxim 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 DS1251 will
be much longer than 10 years since no lithium battery energy is consumed when VCC is present.
CLOCK ACCURACY (DIP MODULE)
The DS1251 is guaranteed to keep time accuracy to within ±1 minute per month at +25°C. The clock is
calibrated at the factory by Maxim using special calibration nonvolatile tuning elements. The DS1251
does not require additional calibration and temperature deviations will have a negligible effect in most
applications. For this reason, methods of field clock calibration are not available and not necessary.
CLOCK ACCURACY (POWERCAP MODULE)
The DS1251P and DS9034PCX are each individually tested for accuracy. Once mounted together, the
module is guaranteed to keep time accuracy to within ±1.53 minutes per month (35ppm) at +25°C.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1251Y-70+ | 功能描述:实时时钟 4096K NV SRAM w/Phantom Clock 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 |
| DS1251YP | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:4096k NV SRAM with Phantom Clock |
| DS1251YP/WP | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:PowerCap with Crystal |
| DS1251YP-100 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS1251YP-70 | 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 |
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