The DS2404 1-Wire® EconoRAM time chip offers a simple solution for storing and retrieving vital data and time information with minimal hardware. The DS2404 contains a unique lasered ROM, real-time clock/calendar, interval timer, cycle counter, programmable interrupts, and 4096-bits of SRAM. Two separate ports are provided for communication: 1-Wire and 3-wire. Using the 1-Wire port, only one pin is required for communication, and the lasered-ROM can be read even when the DS2404 is without power. The 3-wire port provides high-speed communication using the traditional Dallas Semiconductor 3-wire interface. With either interface, a strict protocol for accessing the DS2404 ensures data integrity. Utilizing backup energy sources, the data is nonvolatile (NV) and allows for stand-alone operation. The DS2404 features can be used to create a stopwatch, alarm clock, time and date stamp, logbook, hour meter, calendar, system power-cycle timer, expiration timer, and event scheduler.


  • 4096 bits of nonvolatile dual-port memory including real-time clock/calendar in binary format, programmable interval timer, and programmable power-on cycle counter
  • 1-Wire interface for communication at 16.3kbps
  • 3-wire host interface for high-speed data communications at 2Mb/s
  • Unique, factory-lasered and tested 64-bit registration number assures absolute traceability because no two parts are alike
  • Programmable alarms can be set to generate interrupts for interval timer, real-time clock, and/or cycle counter
  • 16-pin DIP, SO, and SSOP packages
  • Operating temperature range from -40°C to +85°C
  • Operating voltage range from 2.8V to 5.5V


参考原理图 244 性能优异的1-Wire网络驱动器
应用笔记 155 1-Wire软件资源指南和器件说明


产品可靠性报告: DS2404.pdf 
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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类型 编号 PDF 标题
参考原理图 244 性能优异的1-Wire网络驱动器
应用笔记 155 1-Wire软件资源指南和器件说明
类型 编号 标题