DS28CN01

`􀂃 1024 Bits of EEPROM Memory Partitioned Into Four Pages of 256 Bits
`􀂃 Dedicated Hardware-Accelerated SHA Engine for Generating SHA-1 MACs
`􀂃 EEPROM Memory Pages can be Individually Copy-Protected or Put Into an EPROM Mode (Program from 1 to 0 Only)
`􀂃 Write Access Requires Knowledge of the Secret and the Capability of Computing and Transmitting a 160-Bit MAC as Authorization
`􀂃 Unique, Factory-Programmed, and Tested 64-Bit Registration Number Assures Absolute Traceability Because No Two Parts are Alike
`􀂃 Endurance 200k Cycles at +25°C
`􀂃 Serial Interface User Programmable for I²C Bus and SMBus Compatibility
`􀂃 Supports 100kHz and 400kHz I²C Communication Speeds
`􀂃 5.5V Tolerant Interface Pins
`􀂃 Operating Range: 1.62V to 5.5V, -40°C to +85°C
`􀂃 8-Pin SOP Package

·Printed Circuit Board (PCB) Unique Serialization
·Accessory and Peripheral Identification
·Equipment Registration and License Management
·Network Node Identification
·Printer Cartridge Configuration and Monitoring
·Medical Sensor Authentication and Calibration
·System Intellectual Property Protection

Voltage Range on Any Pin Relative to Ground.. . -0.5V, +6V
Maximum Current Any Pin ...............±20mA
Operating Temperature Range...... . -40°C to +85°C
Junction Temperature ........ ........ +150°C
Storage Temperature Range........ -55°C to +125°C
Soldering Temperature.... ... See IPC/JEDEC J-STD-020
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is
not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device.

The DS28CN01 combines 1024 bits of EEPROM with challenge-and-response authentication security implemented with the Federal Information Publications (FIPS) 180-1/180-2 and ISO/IEC 10118- 3 Secure Hash Algorithm (SHA-1). The memory is organized as four pages of 32 bytes each. Data copy-protection and EPROM emulation features are supported for each memory page. Each DS28CN01 has a guaranteed unique factory-programmed 64-bit registration number. Communication with the DS28CN01 is accomplished through an industry standard I²C- and SMBus™-compatible interface. The SMBus timeout feature resets the device's interface if a bus-timeout fault condition is detected.