DS28E22P+

General DescriptionDeepCoverM 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 (DS28E22) 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 2Kb 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.
Features
♦ 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, UserProgrammable Secret, and Input Challenge
♦ 2048 Bits of User EEPROM Partitioned Into 8 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 Human Body Model ESD Protection (typ)
♦ 6-Pin TDFN, 6-Lead TSOC PackagesApplications Authentication of Network-Attached Appliances Printer Cartridge ID/Authentication Reference Design License Management System Intellectual Property Protection Sensor/Accessory Authentication and Calibration Secure Feature Setting for Configurable Systems Key Generation and Exchange for Cryptographic Systems