ABRIDGED DATA SHEET DS28EL15 DeepCover Secure Authenticator with 1-Wire SHA-256 and 512-Bit User EEPROM General Description Features DeepCoverK embedded security solutions cloak sensi- S Symmetric-Key-Based Bidirectional Secure tive data under multiple layers of advanced physical Authentication Model Based on SHA-256 security to provide the industrys most secure key stor- S Strong Authentication with a High-Bit-Count User- age possible. The Deepcover Secure Authenticator Programmable Secret and Input Challenge (DS28EL15) combines crypto-strong bidirectional secure S 512 Bits of User EEPROM Partitioned Into Two challenge-and-response authentication functionality with Pages of 256 Bits an implementation based on the FIPS 180-3-specified Secure Hash Algorithm (SHA-256). A 512-bit user- S User-Programmable and Irreversible EEPROM Protection Modes Including Authentication, Write programmable EEPROM array provides nonvolatile stor- age of application data. Additional protected memory and Read Protect, and OTP/EPROM Emulation holds a read-protected secret for SHA-256 operations S Unique Factory-Programmed, 64-Bit Identification and settings for memory protection control. Each device Number has its own guaranteed unique 64-bit ROM identification S Single-Contact 1-Wire Interface number (ROM ID) that is factory programmed into the S Operating Range: 1.8V 5%, -40C to +85C chip. This unique ROM ID is used as a fundamental input parameter for cryptographic operations and also serves S 8kV HBM ESD Protection (typ) as an electronic serial number within the application. A S 6-Pin TDFN-EP Package bidirectional security model enables two-way authen- tication between a host system and slave-embedded Typical Application Circuit DS28EL15. Slave-to-host authentication is used by a host system to securely validate that an attached or embed- ded DS28EL15 is authentic. Host-to-slave authentication is used to protect DS28EL15 user memory from being R = 820 P 2 MAXIMUM I C BUS CAPACITANCE 400pF modified by a nonauthentic host. The DS28EL15 commu- 1.8V M nicates over the single-contact 1-Wire bus at overdrive speed. The communication follows the 1-Wire protocol R P with the ROM ID acting as node address in the case of a V CC SDA multidevice 1-Wire network. 2 (I C PORT) SCL Applications DS24L65 C Authentication of Consumables 1-Wire LINE SLPZIO Secure Feature Control DS28EL15 Ordering Information appears at end of data sheet. 1-Wire is a registered trademark and DeepCover is a trademark of Maxim Integrated Products, Inc. For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/DS28EL15.related For pricing, delivery, and ordering information, please contact Maxim Direct at 219-0021 Rev 0 12/12 1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com.ABRIDGED DATA SHEET DS28EL15 DeepCover Secure Authenticator with 1-Wire SHA-256 and 512-Bit User EEPROM ABSOLUTE MAXIMUM RATINGS IO Voltage Range to GND ....................................-0.5V to +4.0V Storage Temperature Range ............................ -55NC to +125NC IO Sink Current ...................................................................20mA Lead Temperature (soldering, 10s) ................................+300NC Operating Temperature Range .......................... -40NC to +85NC Soldering Temperature (reflow) ......................................+260NC Junction Temperature .....................................................+150NC Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional opera- tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (T = -40NC to +85NC, unless otherwise noted.) (Note 1) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS IO PIN: GENERAL DATA 1-Wire Pullup Voltage V (Note 2) 1.71 1.89 V PUP 1-Wire Pullup Resistance R V = 1.8V Q5% (Note 3) 300 750 I PUP PUP Input Capacitance C (Notes 4, 5) 1500 pF IO Input Load Current I IO pin at V 5 19.5 FA L PUP 0.65 x High-to-Low Switching Threshold V (Notes 6, 7) V TL V PUP Input Low Voltage V (Notes 2, 8) 0.3 V IL 0.75 x (Notes 6, 9) V Low-to-High Switching Threshold V TH V PUP Switching Hysteresis V (Notes 6, 10) 0.3 V HY Output Low Voltage V I = 4mA (Note 11) 0.4 V OL OL Recovery Time t 5 R = 750I (Notes 2, 12) Fs REC PUP Time Slot Duration t (Notes 2, 13) 13 Fs SLOT IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE Reset Low Time t (Note 2) 48 80 Fs RSTL Reset High Time t (Note 14) 48 Fs RSTH Presence-Detect Sample Time t (Notes 2, 15) 8 10 Fs MSP IO PIN: 1-Wire WRITE Write-Zero Low Time t (Notes 2, 16) 8 16 Fs W0L Write-One Low Time t (Notes 2, 16) 1 2 Fs W1L IO PIN: 1-Wire READ Read Low Time t (Notes 2, 17) 1 Fs 2 - d RL (Notes 2, 17) 2 Read Sample Time t Fs MSR t + d RL EEPROM Programming Current I V = 1.89V (Notes 5, 18) 1 mA PROG PUP Programming Time for a 32-Bit t (Note 19) 10 ms PRD Segment or Page Protection Programming Time for the Secret t Refer to the full data sheet. ms PRS Maxim Integrated 2