Common Features

Key Specifications

Key Features

• 1128 bits of 5V EEPROM memory partitioned into four pages of 256 bits, a 64-bit write-only secret and up to five general purpose read/write registers
  
• Write access requires knowledge of the secret and the capability of computing and transmitting a 160-bit MAC as authorization
  
• Secret and data memory can be write-protected (all or page 0 only) or put in EPROM-emulation mode ("write to 0", page 1)
  
• On-chip 512-bit SHA-1 engine to compute 160-bit MAC and to generate secrets
  
• Reads and writes over a wide voltage range of 2.8V to 5.25V from -40°C to +85°C
  
• Communicates to host with a single digital signal at 14.1kb per second using 1-Wire protocol
  
• On-chip 16-bit CRC generator for safeguarding data transfers
  
• Overdrive mode boosts communication speed to 125kbps
  
• Operating temperature range from -40°C to +85°C
  
• Minimum 10 years of data retention at 85°C