Datasheet Details
| Part number | DS1991 |
|---|---|
| Manufacturer | Dallas Semiconductor |
| File Size | 326.54 KB |
| Description | MultiKey iButton |
| Datasheet |
 DS1991 Datasheet
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General Description
The DS1991 MultiKey iButton is a rugged read/write data carrier that acts as three separate electronic keys, offering 1,152 bits of secure, nonvolatile memory.
Each key is 384 bits long with distinct 64-bit password and public ID fields (Figure 1).
Key Features
- 1,152-bit secure read/write, nonvolatile memory.
- Secure memory cannot be deciphered www. DataSheet4U. com without matching 64-bit password.
- Memory is partitioned into 3 blocks of 384 bits each.
- 64-bit password and ID fields for each memory block.
- 512-bit scratchpad ensures data transfer integrity.
- Operating temperature range: -40°C to +70°C.
- Over 10 years of data retention.
- Easily affixed with self-stick adhesive backing, latched by its flange.