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DS28E02Q+TR Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS28E02Q+TR Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 21 page General Description The DS28E02 combines 1024 bits of EEPROM with challenge-and-response authentication security imple- mented with the FIPS 180-3 Secure Hash Algorithm (SHA-1). The 1024-bit EEPROM array is configured as four pages of 256 bits with a 64-bit scratchpad to per- form write operations. All memory pages can be write protected, and one page can be put in EPROM-emula- tion mode, where bits can only be changed from a 1 to a 0 state. Each DS28E02 has its own guaranteed unique 64-bit ROM registration number that is factory installed into the chip. The DS28E02 communicates over the single-contact 1-Wire® bus. The communica- tion follows the standard 1-Wire protocol with the regis- tration number acting as the node address in the case of a multidevice 1-Wire network. Applications Reference Design License Management System Intellectual Property Protection Sensor/Accessory Authentication and Calibration Medical Consumable Authentication Printer Cartridge Configuration and Monitoring Features o 1024 Bits of EEPROM Memory Partitioned Into Four Pages of 256 Bits o On-Chip 512-Bit SHA-1 Engine to Compute 160- Bit Message Authentication Codes (MACs) and to Generate Secrets o Write Access Requires Knowledge of the Secret and the Capability of Computing and Transmitting a 160-Bit MAC as Authorization o User-Programmable Page Write Protection for Page 0, Page 3, or All Four Pages Together o User-Programmable OTP EPROM Emulation Mode for Page 1 (“Write to 0”) o Communicates to Host with a Single Digital Signal at 12.5kbps or 35.7kbps Using 1-Wire Protocol o Switchpoint Hysteresis and Filtering to Optimize Communication Performance in the Presence of Noise o Reads and Writes Over 1.75V to 3.65V Voltage Range from -20°C to +85°C o 6-Lead TSOC and TDFN Packages 1-Wire SHA-1 Authenticated 1Kb EEPROM with 1.8V Operation ________________________________________________________________ Maxim Integrated Products 1 Ordering Information 219-0008; Rev 1; 3/12 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ABRIDGED DATA SHEET PART TEMP RANGE PIN-PACKAGE DS28E02P+ -20 °C to +85°C 6 TSOC DS28E02P+T&R -20 °C to +85°C 6 TSOC DS28E02Q+T&R -20 °C to +85°C 6 TDFN-EP* (2.5k pcs) + Denotes a lead(Pb)-free/RoHS-compliant package. T&R = Tape and reel. * EP = Exposed pad. IO RPUP VCC µC GND DS28E02 Typical Operating Circuit 1-Wire is a registered trademark of Maxim Integrated Products, Inc. |
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