DS2404S

Product Summary

The DS2404S is an EconoRAM Time Chip which offers a simple solution for storing and retrieving vital data and time information with minimal hardware. The DS2404S 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 DS2404S 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 DS2404S ensures data integrity. Utilizing backup energy sources, the data is nonvolatile and allows for stand-alone operation. TheDS2404S 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.

Parametrics

DS2404S absolute maximum ratings: (1)Voltage on DATA to Ground: -0.5V to +7.0V; (2)Operating Temperature: -40℃ to +85℃; (3)Storage Temperature: -55℃to +125℃; (4)Soldering Temperature: 260℃ for 10 seconds.

Features

DS2404S features: (1)4096 bits of nonvolatile dual-port memory including real time clock/calendar in binary format, programmable interval timer, and programmable power-on cycle counter; (2)1-WireTM interface for MicroLAN communication at 16.3k bits per second; (3)3-wire host interface for high-speed data communications at 2M bits per second; (4)Unique, factory-lasered and tested 64-bit registration number (8-bit family code + 48-bit serial number + 8-bit CRC tester) assures absolute traceability because no two parts are alike; (5)Memory partitioned into 16 pages of 256-bits for packetizing data; (6)256-bit scratchpad with strict read/write protocols ensures integrity of data transfer Programmable alarms can be set to generate interrupts for interval timer, real time clock, and/or cycle counter; (7)16-pin DIP, SOIC and SSOP packages; (8)Operating temperature range from -40℃ to +85℃; (9)Operating voltage range from 2.8 to 5.5 Volts.

Diagrams