DS1254W, DS1254Y

2M x 8 NV SRAM,带有隐含时钟


点击查看特定型号的库存状况。

说明

The DS1254 is a fully nonvolatile static RAM (NV SRAM) (organized as 2M words by 8 bits) with built-in real-time clock. It has a self-contained lithium energy source and control circuitry that constantly monitors VCC for an out-of-tolerance condition. When such a condition occurs, the DS1254 makes use of an attached DS3800 battery cap to maintain clock information and preserve stored data while protecting that data by disallowing all memory accesses. Additionally, the DS1254 has dedicated circuitry for monitoring the status of an attached DS3800 battery cap.

The phantom clock provides timekeeping information including hundredths of seconds, seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including correction for leap years. The phantom clock operates in either 24-hour or 12-hour format with an AM/PM indicator.

Because the DS1254 has a total of 168 balls and only 35 active signals, balls are wired together into groups, thus providing redundant connections for every signal.
DS1254、DS1254W、DS1254Y:典型工作电路 DS1254、DS1254W、DS1254Y:典型工作电路 放大+

关键特性

  • Real-Time Clock (RTC) Keeps Track of Hundredths of Seconds, Seconds, Minutes, Hours, Days, Date, Months, and Years with Automatic Leap-Year Compensation Valid Up to the Year 2100
  • 2M x 8 NV SRAM
  • Watch Function is Transparent to RAM Operation
  • Automatic Data Protection During Power Loss
  • Unlimited Write-Cycle Endurance
  • Surface-Mountable BGA Module Construction
  • Over 10 Years of Data Retention in the Absence of Power
  • Battery Monitor Checks Remaining Capacity Daily
  • +3.3V Operation

应用

  • RAID系统
  • 路由器/交换机
  • 电信交换机

质量和环境数据

产品可靠性报告: DS1254W.pdf  DS1254Y.pdf 
无铅封装的锡(Sn)晶须报告
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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