DS28E02
1-Wire SHA-1 Authenticated 1Kb EEPROM with 1.8V Operation
Provides Low-Cost, Secure Bidirectional Authentication Over a Single Contact for Low-Power Applications
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Overview
Features and Benefits
- 1024 Bits of EEPROM Memory Partitioned Into Four Pages of 256 Bits
- On-Chip 512-Bit SHA-1 Engine to Compute 160-Bit Message Authentication Codes (MACs) and to Generate Secrets
- Write Access Requires Knowledge of the Secret and the Capability of Computing and Transmitting a 160-Bit MAC as Authorization
- User-Programmable Page Write Protection for Page 0, Page 3, or All Four Pages Together
- User-Programmable OTP EPROM Emulation Mode for Page 1 ("Write to 0")
- Communicates to Host with a Single Digital Signal at 12.5kbps or 35.7kbps Using 1-Wire Protocol
- Switchpoint Hysteresis and Filtering to Optimize Communication Performance in the Presence of Noise
- Reads and Writes Over 1.75V to 3.65V Voltage Range from -20°C to +85°C
- 6-Lead TSOC and TDFN Packages
Product Details
The DS28E02 combines 1024 bits of EEPROM with challenge-and-response authentication security implemented with the FIPS 180-3 Secure Hash Algorithm (SHA-1). The 1024-bit EEPROM array is configured as four pages of 256 bits with a 64-bit scratchpad to perform write operations. All memory pages can be write protected, and one page can be put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state. Each DS28E02 has its own guaranteed unique 64-bit ROM registration number that is factory installed into the chip. The DS28E02 communicates over the single-contact 1-Wire® bus. The communication follows the standard 1-Wire protocol with the registration number acting as the node address in the case of a multidevice 1-Wire network.
Applications
- Medical Consumable Authentication
- Printer Cartridge Configuration and Monitoring
- Reference Design License Management
- Sensor/Accessory Authentication and Calibration
- System Intellectual Property Protection
Product Categories
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). To request an NDA, click here.
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (4)
Documentation & Resources
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DS28E02 Reliability Data1/12/2023PDF20K
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How to Build a 1-Wire® Evaluation Kit5/14/2012
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Tutorial: Improve Sensor Performance and SNR in Pulse Oximeter Designs6/21/2010
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Protect Your FPGA Against Piracy: Cost-Effective Authentication Scheme Protects IP in SRAM-Based FPGA Designs8/24/2009
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Xilinx® FPGA IFF Copy Protection with 1-Wire® SHA-1 Secure Memories6/21/2006
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Protect Your R&D Investment with Secure Authentication12/22/2005
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White Paper 9: Are SHA-1 Devices Still Secure Enough?5/19/2005
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White Paper 8: 1-Wire® SHA-1 Overview9/10/2002
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White Paper 3: Why are 1-Wire SHA-1 Devices Secure?6/7/2002
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1-Wire Communication Through Software5/30/2002
Product Recommendations
DS28E02 Companion Parts
Recommended Related Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.