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DS28CN01
1Kbit I²C/SMBus EEPROM with SHA-1 Engine
Low-Cost, High-Security, SHA-1-Based Authentication Solution Provides Clone Prevention, IP Protection, and License Management
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Status
Active: In Production.
Description
The DS28CN01 combines 1024 bits of EEPROM with challenge-and-response authentication security implemented with the Federal Information Publications (FIPS) 180-1/180-2 and ISO/IEC 10118-3 Secure Hash Algorithm (SHA-1). The memory is organized as four pages of 32 bytes each. Data copy-protection and EPROM emulation features are supported for each memory page. Each DS28CN01 has a guaranteed unique factory-programmed 64-bit registration number. Communication with the DS28CN01 is accomplished through an industry standard I²C- and SMBus™-compatible interface. The SMBus timeout feature resets the device's
interface if a bus-timeout fault condition is detected.
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Data Sheet
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An evaluation kit is available: DS28CN01EVKIT DSAUTHSK
Key Features
- 1024 Bits of EEPROM Memory Partitioned Into Four Pages of 256 Bits
- Dedicated Hardware-Accelerated SHA Engine for Generating SHA-1 MACs
- EEPROM Memory Pages can be Individually Copy-Protected or Put Into an EPROM Mode (Program from 1 to 0 Only)
- Write Access Requires Knowledge of the Secret and the Capability of Computing and Transmitting a 160-Bit MAC as Authorization
- Unique, Factory-Programmed, and Tested 64-Bit Registration Number Assures Absolute Traceability Because No Two Parts are Alike
- Endurance 200k Cycles at +25°C
- Serial Interface User Programmable for I²C Bus and SMBus Compatibility
- Supports 100kHz and 400kHz I²C Communication Speeds
- 5.5V Tolerant Interface Pins
- Operating Range: 1.62V to 5.5V, -40°C to +85°C
- 8-Pin µSOP Package
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Applications/Uses
- Accessory and Peripheral Identification
- Equipment Registration and License Management
- Medical Sensor Authentication and Calibration
- Network Node Identification
- Printed Circuit Board Unique Serialization
- Printer Cartridge Configuration and Monitoring
- System Intellectual Property Protection
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Key Specifications:
| Memory (EPROM, EEPROM, ROM, NV SRAM) |
| Part Number |
Memory Type |
Memory Size |
Bus Type |
Real Time Clock |
DIP w/Int. Batt. |
Pwr. Cap Pckg. |
Battery Monitor |
GPIO |
VSUPPLY
(V) |
VSUPPLY
(V) |
| min |
max |
| DS28CN01 |
EEPROM |
1K x 1 |
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No |
No |
No |
No |
No |
1.62 |
5.5 |
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See All Memory (EPROM, EEPROM, ROM, NV SRAM) (58)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Typical Operating Circuit
More Information
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Information Index
Rev 2;
2009-12-08
This page last modified: 2010-03-26
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