DS28E25
PRODUCTIONDeepCover Secure Authenticator with 1-Wire SHA-256 and 4Kb User EEPROM
Protect Your Development Investment with Crypto-Strong Authentication and Advanced Physical Security
- Part Models
- 8
- 1ku List Price
- Starting From $1.28
Part Details
- Symmetric-Key-Based Bidirectional Secure Authentication Model Based on SHA-256
- Dedicated Hardware-Accelerated SHA Engine for Generating SHA-256 MACs
- Strong Authentication with a High Bit Count, User-Programmable Secret, and Input Challenge
- 4096 Bits of User EEPROM Partitioned Into 16 Pages of 256 Bits
- User-Programmable and Irreversible EEPROM Protection Modes Including Authentication, Write and Read Protect, and OTP/EPROM Emulation
- Unique, Factory-Programmed 64-Bit Identification Number
- Single-Contact 1-Wire Interface Communicates with Host at Up to 76.9kbps
- Operating Range: 3.3V ±10%, -40°C to +85°C
- Low-Power 5µA (typ) Standby
- ±8kV HBM ESD Protection (typ)
- 2-Pin SFN, 2-Pin TO-92, 6-Pin TDFN, and 6-Pin TSOC Packages
DeepCover™ embedded security solutions cloak sensitive data under multiple layers of advanced physical security to provide the most secure key storage possible.
The DeepCover Secure Authenticator (DS28E25) combines crypto-strong, bidirectional, secure challengeand- response authentication functionality with an implementation based on the FIPS 180-3-specified Secure Hash Algorithm (SHA-256). A 4Kb user-programmable EEPROM array provides nonvolatile storage of application data and additional protected memory holds a readprotected secret for SHA-256 operations and settings for user memory control. Each device has its own guaranteed unique 64-bit ROM identification number (ROM ID) that is factory programmed into the chip. This unique ROM ID is used as a fundamental input parameter for cryptographic operations and also serves as an electronic serial number within the application. A bidirectional security model enables two-way authentication between a host system and slave-embedded DS28E25. Slave-to-host authentication is used by a host system to securely validate that an attached or embedded DS28E25 is authentic. Hostto-slave authentication is used to protect DS28E25 user memory from being modified by a nonauthentic host. The SHA-256 message authentication code (MAC), which the DS28E25 generates, is computed from data in the user memory, an on-chip secret, a host random challenge, and the 64-bit ROM ID. The DS28E25 communicates over the single-contact 1-Wire® bus at overdrive speed. The communication follows the 1-Wire protocol with the ROM ID acting as node address in the case of a multiple-device 1-Wire network.
Our Secure Drug Delivery video shows how Maxim security products can be used to authenticate remote drug delivery.Applications
- Authentication of Network-Attached Appliances
- Key Generation and Exchange for Cryptographic Systems
- Printer Cartridge ID/Authentication
- Reference Design License Management
- Secure Feature Setting for Configurable Systems
- Sensor/Accessory Authentication and Calibration
- System Intellectual Property Protection
Documentation
Data Sheet 1
Reliability Data 1
Application Note 1
Design Note 5
Technical Articles 9
Request an NDA
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA).
Request an NDAADI 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. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| DS28E25+ | TO92 | ||
| DS28E25+T | TO92 | ||
| DS28E25G+T | 2-SFN-6X6X0.9? | ||
| DS28E25G+U | 2-SFN-6X6X0.9? | ||
| DS28E25P+ | Thin Small-Outline C-Lead | ||
| DS28E25P+T | Thin Small-Outline C-Lead | ||
| DS28E25Q+T | Thin Dual Flatpack No Leads, Exposed Pad | ||
| DS28E25Q+U | Thin Dual Flatpack No Leads, Exposed Pad |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
Evaluation Kits
Evaluation System for the DS28E25 and DS2465
Reference Designs
SHA-256 Secure Authentication Design