Datasheet Specifications
- Part number
- DS1221
- Manufacturer
- Dallas
- File Size
- 134.19 KB
- Datasheet
- DS1221_Dallas.pdf
- Description
- Nonvolatile Controller x 4 Chip
Description
DS1221 Nonvolatile Controller x 4 Chip www.dalsemi.com NOT RECOMMENDED FOR NEW DESIGNS, SEE DS1321 DATASHEET INSTEAD..
Features
* Converts CMOS RAMs into nonvolatile memories Data is automatically protected during power loss 2-to-4 decoder provides for up to 4 CMOS RAMs Provides for redundant batteries Test battery condition on power-up Full ±10% operating range Unauthorized access can be prevented with optional security featuApplications
* data integrity is paramount. In these applications it is often desirable to use two batteries to ensure reliability. The DS1221 provides an internal isolation switch which provides for connection of two batteries. During battery back-up operation the battery with the highest voltage is selected forDS1221 Distributors
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