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| PartNumber | DS1321+ | DS1321E+ | DS1321S+ |
| Description | Memory Controllers Flexible NV Cntlr w/Lithium Battery | Memory Controllers Flexible NV Cntlr w/Lithium Battery | Memory Controllers Flexible NV Cntlr w/Lithium Battery |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | Memory Controllers | Memory Controllers | Memory Controllers |
| RoHS | Y | Y | Y |
| Memory Type | Nonvolatile SRAM | Nonvolatile SRAM | Nonvolatile SRAM |
| Battery Backup Switching | Yes | Yes | Yes |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage Min | 4.75 V | 4.75 V | 4.75 V |
| Operating Supply Current | 50 uA | 50 uA | 50 uA |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Mounting Style | Through Hole | SMD/SMT | SMD/SMT |
| Package / Case | PDIP-16 | TSSOP-20 | SOIC-Narrow-16 |
| Packaging | Tube | Tube | Tube |
| Description/Function | Converts Full CMOS SRAMs into Nonvolatile Memories | Converts Full CMOS SRAMs into Nonvolatile Memories | Converts Full CMOS SRAMs into Nonvolatile Memories |
| Height | 3.18 mm | 0.85 mm | 1.35 mm |
| Length | 18.92 mm | 6.4 mm | 9.8 mm |
| Series | DS1321 | DS1321E | DS1321S |
| Type | Non-Volatile SRAM (NVSRAM) | Non-Volatile SRAM (NVSRAM) | Non-Volatile SRAM (NVSRAM) |
| Width | 6.1 mm | 4.3 mm | 3.8 mm |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Lithium Battery Monitor | Yes | Yes | Yes |
| Number of Memory Channels | 4 | 4 | 4 |
| Operating Supply Voltage | 5 V | 5 V | 5 V |
| Product Type | Memory Controllers | Memory Controllers | Memory Controllers |
| Factory Pack Quantity | 25 | 74 | 50 |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |
| Part # Aliases | 90-13210+000 DS1321 | 90-13210+E20 DS1321E | 90-13210+S16 DS1321S |
| Unit Weight | 0.057419 oz | 0.006737 oz | 0.007079 oz |