DS1245AB-70

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DS1245AB-70 is a Nonvolatile SRAM module from Dallas Semiconductor, which was manufactured witha 170 mil SOIC package and a 16 pins lead. This SRAM module is able to run up to 14 MHz with a 15 ns access time, and has a 32K static RAM Chip and Nonvolatile EEPROM on-board. The Nonvolatile SRAM module is a combination of a static RAM, which is powered by a lithium battery, and a EEPROM that holds back-up information over an extended period of time when power is removed.

Application Field

The DS1245AB-70 Nonvolatile SRAM are being widely used across industries. It is a perfect solution for applications requiring the dependability and convenience of data retention with power on/off cycle time. The Industrial field application of the DS1245AB-70 includes DC motor control, industrial workstations and programmable logic controllers, aerospace remote instrumentation and fuel-injection systems. Other areas include automotive test stand applications such as flight control, engine-fuel management, road sign and traffic control, security and surveillance systems such as IP cameras, medical and laboratory equipment, aerospace satellite control, and distributed application controllers.

Operation Principle

The Nonvolatile SRAM module operates is designed to ensure reliable data retention in static RAM while key system voltages are off. The static RAM portion of the module is a true static RAM storage array and is read/write capable. When the SRAM write cycle is initiated, a small amount of data will be stored in the EEPROM. When the cycle is complete, the SRAM and EEPROM each contain identical information. The lithium battery manages the SRAM space and provides backup data storage when the system power is removed. If a power failure occurs, or the system is switched off, the data stored in the SRAM is automatically transferred to the EEPROM. Upon power up, the data stored in the EEPROM is then automatically loaded into the SRAM for quick access.

The DS1245AB-70 Nonvolatile SRAM module can store static data over an extended period of time and still be powered off of a single 3V battery due to its low power operation. This integrated system also allows for data retention when the system power is off and re-powered with no additional software required. The module is also available in Industrial Temperature Range (IEC Standard) for a variety of applications that requires a wider dynamic range of temperatures than commercial grade devices.

The DS1245AB-70 offers a wide range of industrial solutions by providing a higher performance static RAM while enabling the user to backup their valuable data and it is thus the perfect choice for varied applications that require data retention on power-off cycle and higher performance.

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