DS28E10 ABRIDGED DATA SHEET 219-0009 Rev 2 4/11 1-Wire SHA-1 Authenticator General Description Features The DS28E10 combines secure challenge-and-response S Dedicated Hardware-Accelerated SHA-1 Engine authentication functionality based on the FIPS 180-3 for Generating SHA-1 MACs specified Secure Hash Algorithm (SHA-1) with 224 bits S One Page of 28 Bytes User OTP EPROM of one-time programmable user EPROM in a single S Irreversible Write Protection chip. Once written, the memory is automatically write protected. Additionally, each device has its own guaran- S Unique, Factory-Programmed 64-Bit Identification Number teed unique 64-bit ROM identification number (ROM ID) that is factory programmed into the chip. Memory writes S 1-Wire Interface for Standard and Overdrive Speed are performed 4 bytes at a time. A secure and low-cost S Communicates with Host at Up to 15.4kbps at factory programming service is available to preprogram Standard Speed or Up to 125kbps in Overdrive Mode device data, including the SHA-1 security data compo- S Operating Range from 2.8V to 3.6V, -40NC to +85NC nents. The device communicates over the single-contact 1-Wire bus. The communication follows the standard S 3-Lead SOT23, 6-Lead TSOC Package 1-Wire protocol with the ROM ID acting as node address S 6kV Human Body Model (HBM) ESD Protection in the case of a multidevice 1-Wire network. (typ) on 1-Wire and V Pin CC Applications Typical Operating Circuit Reference Design License Management System Intellectual Property Protection 3.3V Sensor/Accessory Authentication and Calibration V V CC CC R PUP Ordering Information C DS28E10 PART TEMP RANGE PIN-PACKAGE 1-Wire Px.1 IO DS28E10R+T -40NC to +85NC 3 SOT23 DS28E10P+ -40NC to +85NC 6 TSOC GND GND DS28E10P+T -40NC to +85NC 6 TSOC +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. 1-Wire is a registered trademark of Maxim Integrated Products, Inc. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLEABRIDGED DATA SHEET 1-Wire SHA-1 Authenticator ABSOLUTE MAXIMUM RATINGS IO Voltage to GND .....................................................-0.5V, +7V Junction Temperature .....................................................+150NC IO Sink Current ...................................................................20mA Storage Temperature Range ............................ -55NC to +125NC V Voltage to GND ..................................................-0.5V, +7V Lead Temperature (soldering, 10s) ................................+300NC CC Operating Temperature Range .......................... -40NC to +85NC Soldering Temperature (reflow) ......................................+260NC 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 absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (T = -40NC to +85NC, see Note 1.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V PIN CC Supply Voltage V During nonprogramming state (Note 2) 2.8 3.6 V CC Standby Current I V = 3.6V 0.5 4.0 FA CCS CC Operating Current I V = 3.6V, reading (Note 3) 30 FA CCO CC IO PIN: GENERAL DATA 1-Wire Pullup Voltage V (Note 4) 2.8 3.6 V PUP 1-Wire Pullup Resistance R (Notes 4, 5) 0.3 2.2 kI PUP Input Capacitance C (Note 3) 50 pF IO Input Load Current I (IO pin at V ) (Note 3) 2 FA L PUP Input Low Voltage V (Notes 4, 6, 7) 0.3 O V V IL CC Input High Voltage V (Notes 3, 8) 0.7 O V V IH CC Switching Hysteresis V (Notes 3, 9) 0.05 O V V HY CC Output Low Voltage V At 4mA load (Note 10) 0.3 V OL Standard speed, R = 2.2kI 5 PUP Recovery Time (Notes 4, 11) t Fs REC 2 Overdrive speed, R = 2.2kI PUP Standard speed 0.5 5 Rising-Edge Hold-Off Time t Fs REH (Notes 3, 12) Overdrive speed Not applicable (0) Standard speed 65 Timeslot Duration (Notes 4, 13) t Fs SLOT Overdrive speed 8 IO PIN: 1-Wire RESET, PRESENCE DETECT CYCLE Standard speed 480 640 Reset Low Time (Note 4) t Fs RSTL Overdrive speed 48 80 Standard speed 15 60 Presence-Detect High Time t Fs PDH Overdrive speed 2 6 Standard speed 60 240 Presence-Detect Low Time t PDL Fs Overdrive speed 8 24 Standard speed 60 75 Presence-Detect Sample Time t Fs MSP (Notes 4, 14) Overdrive speed 6 10 IO PIN: 1-Wire WRITE Standard speed 60 120 Write-Zero Low Time t Fs W0L (Notes 4, 15) Overdrive Speed 6 16 Standard speed 1 15 Write-One Low Time t Fs W1L (Notes 4, 15) Overdrive speed 1 2 2 DS28E10