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| PartNumber | DS1921G-F5# | DS1920-F5+ | DS1921G-F5+ |
| Description | iButtons & Accessories Thermochron iButton | iButtons & Accessories Temperature iButton | iButtons & Accessories |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | iButtons & Accessories | iButtons & Accessories | iButtons & Accessories |
| RoHS | E | Y | Y |
| Product | iButtons | iButtons | iButtons |
| Type | Thermochron | Thermometer | - |
| Memory Type | SRAM | ROM | SRAM |
| Memory Size | 512 B | 64 bit | 512 B |
| Operating Supply Voltage | 2.8 V to 5.25 V | 2.8 V to 6 V | 2.8 V to 5.25 V |
| Interface Type | 1-Wire | 1-Wire | 1-Wire |
| Minimum Operating Temperature | - 40 C | - 55 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 100 C | + 85 C |
| Dimensions | 17.35 mm x 5.89 mm | 17.35 mm x 5.89 mm | 17.35 mm x 5.89 mm |
| Package / Case | F5 MicroCan | F5 MicroCan | F5 MicroCan |
| Packaging | Bulk | Bulk | - |
| Series | DS1921 | DS1920 | DS1921G |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Type | iButtons & Accessories | iButtons & Accessories | iButtons & Accessories |
| Factory Pack Quantity | 1 | 100 | - |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |
| Part # Aliases | 90-1921G#F50 DS1921G | 90-19200+F50 DS1920 | DS1921G |