- 您现在的位置：买卖IC网 > PDF目录97861 > DS1553W-150 (MAXIM INTEGRATED PRODUCTS INC) 0 TIMER(S), REAL TIME CLOCK, PDIP28 PDF资料下载
参数资料
| 型号： | DS1553W-150 |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP28 |
| 封装： | 0.740 INCH, ENCAPSULATED, DIP-28 |
| 文件页数： | 21/25页 |
| 文件大小： | 546K |
| 代理商： | DS1553W-150 |
DS1553 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
5 of 23
below VSO. RTC operation and SRAM data are maintained from the battery until VCC is returned to
nominal levels.
All control, data, and address signals must be powered down when VCC is powered down.
BATTERY LONGEVITY
The DS1553 has a lithium power source that is designed to provide energy for the 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 DS1553 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. Each DS1553 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.
INTERNAL BATTERY MONITOR
The DS1553 constantly monitors the battery voltage of the internal battery. The Battery Low Flag (BLF)
bit of the Flags register (B4 of 1FF0h) is not writeable and should always be 0 when read. If a 1 is ever
present, an exhausted lithium energy source is indicated, and both the contents of the RTC and RAM are
questionable.
POWER-ON RESET
A temperature-compensated comparator circuit monitors the VCC level. When VCC falls to the power-fail
trip point, the RST signal (open drain) is pulled low. When VCC returns to nominal levels, the RST signal
continues to be pulled low for 40ms to 200ms. The power-on reset function is independent of the RTC
oscillator and is therefore operational whether or not the oscillator is enabled.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1553P-70 | 0 TIMER(S), REAL TIME CLOCK, DMA34 |
| DS1553-70 | 0 TIMER(S), REAL TIME CLOCK, PDIP28 |
| DS1553WP-150 | 0 TIMER(S), REAL TIME CLOCK, DMA34 |
| DS1553WP-120 | 0 TIMER(S), REAL TIME CLOCK, DMA34 |
| DS1553-100 | 0 TIMER(S), REAL TIME CLOCK, DMA28 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1553W-150+ | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM |
| DS1553WP-120 | 功能描述:实时时钟 64kB NV RAM Timekeeper 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 |
| DS1553WP-120+ | 功能描述:实时时钟 64kB NV RAM Timekeeper 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 |
| DS1553WP-150 | 功能描述:实时时钟 64kB NV RAM Timekeeper 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 |
| DS1553WP-150+ | 功能描述:实时时钟 64kB NV RAM Timekeeper 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 |
发布紧急采购，3分钟左右您将得到回复。