EconoRAM Time Chip

Part Number	Status	Replacement	Explanation
DS2404	This product is Not Recommended for New Designs. Some versions may be No Longer Available or being discontinued and subject to Last Time Buy, after which new orders can not be placed. See Ordering Information for details.	DS2417	DS2417 offers 1-Wire RTC functionality. DS2404 is available only for existing customers due to process nonavailability for new builds.

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.

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