General Description
The DS2465 is a SHA-256 coprocessor with built-in 1-Wire® master that provides the SHA-256 and memory functionality required by a host system to communicate with and operate a 1-Wire SHA-256 slave. In addition, it performs protocol conversion between the I2C master and any attached 1-Wire SHA-256 slaves. For 1-Wire line driving, internal user-adjustable timers relieve the system host processor from generating time-critical 1-Wire waveforms, supporting both standard and overdrive 1-Wire communication speeds.

Features
♦ SHA-256 Engine to Operate a Symmetric-Key-Based Bidirectional Secure Authentication Model
♦ Two 32-Byte Pages of User EEPROM with Multiple Programmable Protection Options
♦ 1-Wire Master Port with Selectable Active or Passive 1-Wire Pullup
♦ Strong 1-Wire Pullup Provided by an Internal LowImpedance Signal Path
♦ 1-Wire Port Can Be Powered Down Under
♦oftware Control
♦ I2C Operating (Pullup) Voltage: 3.3V ±10%
♦ ESD Protection of ±8kV HBM (typ) on 1-Wire IO Pin
♦ Operating Range: 3.3V ±10%, -40NC to +85NC
♦ 6-Pin TSOC Package

Applications
    Authentication of Consumables
    Secure Feature Control