DS28EL15 Datasheet, PDF (1/6 Pages) Maxim Integrated Products – DeepCover Secure Authenticator with 1-Wire SHA-256 and 512-Bit User EEPROM

ABRIDGED DATA SHEET
DS28EL15
DeepCover Secure Authenticator
with 1-Wire SHA-256 and 512-Bit User EEPROM
General Description
DeepCoverK embedded security solutions cloak sensi-
tive data under multiple layers of advanced physical
security to provide the industry’s most secure key stor-
age possible. The Deepcover Secure Authenticator
(DS28EL15) combines crypto-strong bidirectional secure
challenge-and-response authentication functionality with
an implementation based on the FIPS 180-3-specified
Secure Hash Algorithm (SHA-256). A 512-bit user-
programmable EEPROM array provides nonvolatile stor-
age of application data. Additional protected memory
holds a read-protected secret for SHA-256 operations
and settings 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
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
modified by a nonauthentic host. The DS28EL15 commu-
nicates over the single-contact 1-Wire^M bus at overdrive
speed. The communication follows the 1-Wire protocol
with the ROM ID acting as node address in the case of a
multidevice 1-Wire network.
Applications
Authentication of Consumables
Secure Feature Control
Ordering Information appears at end of data sheet.
Features
S Symmetric-Key-Based Bidirectional Secure
Authentication Model Based on SHA-256
S Strong Authentication with a High-Bit-Count User-
Programmable Secret and Input Challenge
S 512 Bits of User EEPROM Partitioned Into Two
Pages of 256 Bits
S User-Programmable and Irreversible EEPROM
Protection Modes Including Authentication, Write
and Read Protect, and OTP/EPROM Emulation
S Unique Factory-Programmed, 64-Bit Identification
Number
S Single-Contact 1-Wire Interface
S Operating Range: 1.8V ±5%, -40°C to +85°C
S ±8kV HBM ESD Protection (typ)
S 6-Pin TDFN-EP Package
Typical Application Circuit
1.8V
(I²C PORT)
µC
RP = 820Ω
MAXIMUM I²C BUS CAPACITANCE 400pF
RP
VCC
SDA
SCL
DS24L65
1-Wire LINE
SLPZ
IO
DS28EL15
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
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
219-0021; Rev 0; 12/12