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Maxim > Solutions > Security Systems
User Authentication
Several applications use the Dallas SHA iButton® tokens for eCash, vending, fare collection, and user authentication.
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| Display |
Title/Parts |
Key Advantages |
| QV PDF |
1024-Bit EEPROM iButton
DS1972
| EPROM-Emulation Mode for Protection Against Accidental Erasure or Tampering of Data |
| QV PDF |
Single-Piece 256Kb Nonvolatile SRAM
DS2030AB, DS2030Y
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| QV PDF |
Password-Protected 32KB EEPROM iButton
DS1977
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| QV PDF |
iButton Plastic Card Mounts
DS9093RA, DS9093RB
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| QV |
1Kb Protected EEPROM iButton with SHA-1 Engine
DS1961S
| World-Class Security in Stainless Steel Case for Access Control and eCash Applications |
| QV |
SHA iButton
DS1963S
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| Key Specifications: iButton Products |
| Part Number |
Overview |
Memory Type |
Memory Size |
Security Features |
Unique Ware |
Real Time Clock |
Features |
Smallest Available Pckg.
(mm2) |
| max w/pins |
| DS1972 |
iButton Memory |
EEPROM |
1K bits |
- |
No |
No |
EPROM Emulation Mode |
301 |
| DS1961S |
Secure iButton |
EEPROM |
1K bits |
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Monetary Ecash |
| DS1977 |
iButton Memory |
EEPROM |
32K Bytes |
Password Protected |
- |
| DS1963S |
Secure iButton |
NV SRAM |
4Kbits |
| SHA-1 | | Secure Coprocessor | | Write Cycle Counters | | Write-Only Secrets |
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Monetary Ecash |
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See All iButton Products (26)
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