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DS28E15 Schematic ( PDF Datasheet ) - Maxim Integrated

Teilenummer DS28E15
Beschreibung DeepCover Secure Authenticator
Hersteller Maxim Integrated
Logo Maxim Integrated Logo 




Gesamt 5 Seiten
DS28E15 Datasheet, Funktion
ABRIDGED DATA SHEET
DS28E15
DeepCover Secure Authenticator with
1-Wire SHA-256 and 512-Bit User EEPROM
General Description
DeepCover™ embedded security solutions cloak sensi-
tive data under multiple layers of advanced physical
security to provide the most secure key storage possible.
The DeepCover Secure Authenticator (DS28E15) com-
bines crypto-strong bidirectional secure challenge-and-
response authentication functionality with an imple-
mentation based on the FIPS 180-3-specified Secure
Hash Algorithm (SHA-256). A 512-bit user-program-
mable EEPROM array provides nonvolatile storage of
application data. Additional protected memory holds a
read-protected secret for SHA-256 operations and set-
tings for memory protection control. Each device has
its own guaranteed unique 64-bit ROM identification
number (ROM ID) that is factory 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. A
bidirectional security model enables two-way authen-
tication between a host system and slave-embedded
DS28E15. Slave-to-host authentication is used by a host
system to securely validate that an attached or embed-
ded DS28E15 is authentic. Host-to-slave authentication is
used to protect DS28E15 user memory from being modi-
fied by a unauthentic host. The DS28E15 communicates
over the single-contact 1-WireM 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
Secure Feature Control
Ordering Information appears at end of data sheet.
Benefits and Features
● 512-Bit EEPROM with SHA-256 Authentication for
Reads and Writes
• Symmetric-Key-Based Bidirectional Secure
Authentication Model Based on SHA-256
• Strong Authentication with a High-Bit-Count User
Programmable Secret and Input Challenge
• 512 Bits of User EEPROM Partitioned Into Two
Pages of 256 Bits
• User-Programmable and Irreversible EEPROM
Protection Modes Including Authentication, Write
and Read Protect, and OTP/EPROM Emulation
Unique Factory-Programmed, 64-Bit Identification
Number
● Minimalist 1-Wire Interface Lowers Cost and
Interface Complexity
• Reduces Control, Address, Data, Power, and
Programming Signals to a Single Data Pin
• ±8kV HBM ESD Protection (typ)
• 2-Pin SFN, 6-Pin TDFN-EP, and 6-Pin TSOC
Packages
• Operating Range: 3.3V ±10%, -40°C to +85°C
Typical Application Circuit
3.3V
(I2C PORT)
µC
RP = 1.1k
MAXIMUM I2C BUS CAPACITANCE 320pF
RP
SDA
SCL
VCC
DS2465
SLPZ IO 1-Wire LINE
DS28E15
DeepCover is a trademark and 1-Wire is a registered trademark of Maxim Integrated Products, Inc.
219-0018; Rev 3; 3/15





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