DS28E01-100

·􀂃 1024 bits of EEPROM memory partitioned into four pages of 256 bits
·􀂃 On-chip 512-bit SHA-1 engine to compute 160-bit Message Authentication Codes (MAC) and to generate secrets
·􀂃 Write access requires knowledge of the secret and the capability of computing and transmitting a 160-bit MAC as authorization
·􀂃 User-programmable page write-protection for page 0, page 3 or all four pages together
·􀂃 User-programmable OTP EPROM emulation mode for page 1 ("write to 0")
·􀂃 Communicates to host with a single digital signal at 15.3k bits or 125k bits per second using 1-Wire protocol
·􀂃 Switchpoint Hysteresis and Filtering to Optimize Performance in the Presence of Noise
·􀂃 Reads and writes over a wide voltage range of 2.8V to 5.25V from -40°C to +85°C
·􀂃 6-lead TSOC, 2-lead SFN or solder-bumped chipscale surface mount package

IO Voltage to GND............-0.5V, +6V
IO Sink Current................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-020A

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 reliability.

The DS28E01-100 combines 1024 bits of EEPROM with challenge-and-response authentication security implemented with the ISO/IEC 10118-3 Secure Hash Algorithm (SHA-1). The 1024-bit EEPROM array is configured as four pages of 256 bits with a 64-bit scratchpad to perform write operations. All memory pages can be write protected, and one  age can be put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state. Each DS28E01-100 has its own guaranteed unique 64-bit ROM registration number that is factory lasered into the chip. The DS28E01-100  ommunicates over the single-contact 1-Wire® bus. The communication follows the standard Dallas Semiconductor 1-Wire protocol with the registration number acting as node address in the case of a multi-device 1-Wire network.