General Description

The DS28E15 combines crypto-strong bidirectional secure challenge-and-response authentication functionality with an implementation based on the FIPS 180-3-specified Secure Hash Algorithm (SHA-256). A 512-bit user-programmable EEPROM array provides nonvolatile storage of application data. Additional protected memory holds a read-protected secret for SHA-256 operations and settings for memory protection control.

Features

Symmetric-Key-Based Bidirectional Secure Authentication Model Based on SHA-256

Strong Authentication with a High-Bit-Count User Programmable Secret and Input Challenge

512 Bits of User EEPROM Partitioned Into Two 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

Operating Range: 3.3V ±10%, -40°C to +85°C

±8kV HBM ESD Protection (typ)

2-Pin SFN, 6-Pin TDFN-EP, and 6-Pin TSOC Packages

Applications

Authentication of Consumables

Secure Feature Control