| Part Number | DS1221 |
| Manufacturer | Dallas |
| Title | Nonvolatile Controller x 4 Chip |
| Description | A, B CE CE0 - CE3 VBAT1 VBAT2 * RST VCCI VCCO * RD * WE *D/Q - Address Inputs - Chip Enable Input - Chip Enable Outputs - + Battery 1 - + Batter... |
| 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 ac...
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| Datasheet |
 DS1221 Datasheet
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