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参数资料
| 型号： | DS1248P |
| 英文描述： | 1024k NV SRAM with Phantom Clock |
| 中文描述： | 1024k NV SRAM，带有隐含时钟 |
| 文件页数： | 7/21页 |
| 文件大小： | 285K |
| 代理商： | DS1248P |
DS1248/DS1248P
7 of 21
BATTERY LONGEVITY
The DS1248 has a lithium power source that is designed to provide energy for clock activity and clock
and RAM data retention when the V
CC
supply is not present. The capability of this internal power supply
is sufficient to power the DS1248 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 V
CC
power. Each DS1248 is shipped from Dallas Semiconductor with its lithium energy
source disconnected, guaranteeing full energy capacity. When V
CC
is first applied at a level greater than
V
PF
, the lithium energy source is enabled for battery-backup operation. Actual life expectancy of the
DS1248 will be much longer than 10 years since no lithium battery energy is consumed when V
CC
is
present.
CLOCK ACCURACY (DIP MODULE)
The DS1248 is guaranteed to keep time accuracy to within 1 minute per month at +25 C. The clock is
calibrated at the factory by Dallas Semiconductor using special calibration nonvolatile tuning elements
and does not require additional calibration. For this reason, methods of field clock calibration are not
available and not necessary.
CLOCK ACCURACY (POWERCAP MODULE)
The DS1248P and DS9034PCX are each individually tested for accuracy. Once mounted together, the
module will typically keep time accuracy to within 1.53 minutes per month (35ppm) at +25 C.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1248WP120IND | 1024k NV SRAM with Phantom Clock |
| DS1248Y70IND | 1024k NV SRAM with Phantom Clock |
| DS1248YP70IND | 1024k NV SRAM with Phantom Clock |
| DS1250W | 3.3V 4096k Nonvolatile SRAM |
| DS1251 | 4096k NV SRAM with Phantom Clock |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1248W-120 | 功能描述:IC NVSRAM 1MBIT 120NS 32DIP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 实时时钟 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 类型:时钟/日历 特点:警报器，闰年，SRAM 存储容量:- 时间格式:HH:MM:SS（12/24 小时） 数据格式:YY-MM-DD-dd 接口:SPI 电源电压:2 V ~ 5.5 V 电压 - 电源，电池:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WDFN 裸露焊盘 供应商设备封装:8-TDFN EP 包装:管件 |
| DS1248W-120+ | 功能描述:实时时钟 1024k 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 |
| DS1248W-120IND | 功能描述:IC NVSRAM 1MBIT 120NS 32DIP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 实时时钟 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 类型:时钟/日历 特点:警报器，闰年，SRAM 存储容量:- 时间格式:HH:MM:SS（12/24 小时） 数据格式:YY-MM-DD-dd 接口:SPI 电源电压:2 V ~ 5.5 V 电压 - 电源，电池:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WDFN 裸露焊盘 供应商设备封装:8-TDFN EP 包装:管件 |
| DS1248W-120IND+ | 功能描述:实时时钟 1024k 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 |
| DS1248WP-120 | 功能描述:IC NVSRAM 1MBIT 120NS 34PCM RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 实时时钟 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 类型:时钟/日历 特点:警报器，闰年，SRAM 存储容量:- 时间格式:HH:MM:SS（12/24 小时） 数据格式:YY-MM-DD-dd 接口:SPI 电源电压:2 V ~ 5.5 V 电压 - 电源，电池:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WDFN 裸露焊盘 供应商设备封装:8-TDFN EP 包装:管件 |
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