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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
| |
| QV PDF |
Password-Protected 32kB EEPROM iButton
DS1977
| |
| QV PDF |
iButton Plastic Card Mounts
DS9093RA, DS9093RB
| |
| 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
| |
| Key Specifications:
Memory (EPROM, SRAM, EEPROM, ROM, NV SRAM) |
| Part Number |
Memory Type |
Memory Size |
Bus Type |
Real-Time Clock |
DIP with Internal Battery |
PowerCap Package |
Battery Monitor |
With GPIO |
Single Piece Module |
Features |
Supply Voltage (min) (V) |
Supply Voltage (max) (V) |
Package |
Smallest Available Package (max w/pins) (mm2) |
Operating Temp. Range (°C) |
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DS2030AB
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NV SRAM
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32k x 8
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Parallel
|
No
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No
|
No
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No
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No
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Yes
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4.75
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5.25
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MOD/256
|
729
|
-40 to +85
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DS2030Y
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NV SRAM
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32k x 8
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Parallel
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No
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No
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No
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No
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No
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Yes
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|
4.5
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5.5
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MOD/256
|
729
|
-40 to +85
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| See All Memory (EPROM, SRAM, EEPROM, ROM, NV SRAM) (69) |
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