The DS28E01P-100+T is a 1Kb protected 1-wire EEPROM with SHA-1 engine in 6 pin TSOC package. It combines 1024bits of EEPROM with challenge and response authentication security implemented with the ISO/IEC 10118-3 secure hash algorithm (SHA-1). The 1024bit EEPROM array is configured as four pages of 256bits with a 64bit scratchpad to perform write operations. All memory pages can be write protected and one page can be put in EPROM emulation mode where bits can only be changed from a 1 state to a 0 state. It has its own unique 64bit ROM registration number that is factory lasered into chip. Communication follows standard 1-wire protocol with the registration number acting as node address in case of a multidevice 1-wire network. It is used in printer cartridge configuration and monitoring, medical sensor authentication and calibration, system intellectual property protection.
Supply voltage range is 2.8V to 5.25V
Operating temperature range from -40°C to 85°C
On-chip 512bit SHA-1 engine to compute 160bit message authentication codes & to generate secrets
Write access requires knowledge of secret & capability of computing, transmitting 160bit MAC
User programmable page write protection for page 0, page 3 or all 4 pages together
User programmable OTP EPROM emulation mode for page 1 ('write to 0')
Communicates to host with a single digital signal at 15.3Kbps or 90.9Kbps using 1-wire protocol
Switchpoint hysteresis and filtering to optimize performance in the presence of noise
(EN)
