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DS28E35 Datasheet

Download or read online Maxim Integrated DS28E35 DeepCover Secure Authenticator with 1-Wire ECDSA and 1Kb User EEPROM pdf datasheet.



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ABRIDGED DATA SHEET
DS28E35
General Description
®
DeepCover
embedded security solutions cloak sensitive
data under multiple layers of advanced physical security
to provide the most secure key storage possible.
The DeepCover Secure Authenticator (DS28E35) pro-
vides a highly secure solution for a host controller to
authenticate peripherals based on the industry stan-
dard (FIPS 186) public-key based Elliptic Curve Digital
Signature Algorithm (ECDSA). The ECDSA engine com-
putes keys and signatures using a pseudorandom curve
over a prime field according to the “Standards for Efficient
Cryptography (SEC)”. The private and public key can
be computed by the device or installed by the user and
optionally locked. Separate memory space is set aside to
store and lock a public-key certificate as it is needed to
verify authenticity. In addition to ECDSA-related memory,
the device has 1024 bits of user memory that is organized
as four pages of 256 bits. Page protection modes include
write protection, read protection, and one-time-program-
mable (OTP) memory emulation modes. The DS28E35
also features a one-time settable, nonvolatile 17-bit dec-
rement-on-command counter, which can be used to keep
track of the lifetime of the object to which the DS28E35
is attached. Each device has its own guaranteed unique
64-bit ROM identification number (ROM ID) that is fac-
tory programmed into the chip. This unique ROM ID is
used as a fundamental input parameter for cryptographic
operations and also serves as an electronic serial number
within the application. The DS28E35 communicates over
®
the single-contact 1-Wire
bus at overdrive speed. The
communication follows the 1-Wire protocol with the ROM
ID acting as node address in the case of a multi-device
1-Wire network.
Applications
● Authentication of Consumables
● Peripheral Authentication
● Medical Sensors
● Printer Cartridge Identification and Authentication
Ordering Information
appears at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/DS28E35.related.
DeepCover and 1-Wire are registered trademarks of Maxim
Integrated Products, Inc.
219-0028; Rev 2; 5/13
EVALUATION KIT AVAILABLE
DeepCover Secure Authenticator with
1-Wire ECDSA and 1Kb User EEPROM
Features
● ECDSA Engine for Public-Key Signature Using a
Defined SEC Domain Parameter Set
● On-Chip Hardware Random Number Generator
● Private and Public Key Can Be Computed by
the Device or Loaded from Outside with Optional
Automatic Locking
● Separate User-Programmable and Lockable Memory
Space to Store a Public-Key Certificate
● 17-Bit One-Time Settable, Nonvolatile Decrement-
On-Command Counter
● SHA-256 Engine to Compute a Hash of EEPROM
Page Data and Host Challenge for Subsequent
ECDSA Signing
● 1024 Bit of User EEPROM Organized as Four Pages
of 256 Bits
● Programmable and Irreversible User EEPROM
Protection Modes Including Write Protection, Read
Protection, and OTP/EPROM Emulation for Individual
Memory Pages
● Unique Factory-Programmed 64-Bit Identification
Number
● Single-Contact 1-Wire Interface Communicates with
Host at Up to 76.9kbps
● Operating Range: 3.3V ±10%, -40ºC to +85ºC
● ±8kV HBM ESD Protection (typ) for IO Pin
● 8-Pin TDFN and 6-Pin TSOC Packages
Typical Application Circuit
3.3V
R1
10kΩ
V
CC
PIOX
Q1
BSS84
µC
1-WIRE
PIOY
GND
R
DS28E35
PUP
IO
GND

Summary of Contents

Page 1

... The DS28E35 also features a one-time settable, nonvolatile 17-bit dec- rement-on-command counter, which can be used to keep track of the lifetime of the object to which the DS28E35 is attached. Each device has its own guaranteed unique 64-bit ROM identification number (ROM ID) that is fac- tory programmed into the chip ...

Page 2

... ABRIDGED DATA SHEET DS28E35 Absolute Maximum Ratings IOVoltageRangetoGND ...-0.5Vto4.0V IO Sink Current...20mA Operating Temperature Range ...-40ºCto85ºC Junction Temperature ... 150ºC 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 ...

Page 3

... W1LMAX F MIN TYP MAX UNITS 25º 1-Wire timing, and PUP PUP to be detected as logic-zero 85ºC,25ºC,and-40ºC. A DS28E35 present. The power- The actual ε,respectively. W0LMAX F to the input-high RLMAX F Maxim Integrated 3 ...

Page 4

... IO 36 38 N.C. — www.maximintegrated.com DeepCover Secure Authenticator with 1-Wire ECDSA and 1Kb User EEPROM TOP VIEW N.C. N.C. N.C. N. GND 1 6 N.C. DS28E35 DS28E35 N. TSOC GND N.C. TDFN (2mm x 3mm) FUNCTION GroundReference 1-WireBusInterface.Open-drainsignalthatrequiresanexternalpullupresistor. ...

Page 5

... Package drawings may show a different suffix character, but thedrawingpertainstothepackageregardlessofRoHSstatus. PACKAGE TYPE 6 TSOC 8TDFN-EP PACKAGE OUTLINE LAND CODE NO. PATTERN NO. D61 21-0382 90-0321 T8231 21-0174 90-0091 www.maximintegrated.com/DS28E35 Maxim Integrated 40 and ...

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