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Maxim Integrated Semiconductor Electronic Components Datasheet

DS28EL15 Datasheet

DeepCover Secure Authenticator

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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-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
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 = 820
MAXIMUM I2C BUS CAPACITANCE 400pF
RP
VCC
SDA
SCL
DS24L65
SLPZ IO 1-Wire LINE
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


Maxim Integrated Semiconductor Electronic Components Datasheet

DS28EL15 Datasheet

DeepCover Secure Authenticator

No Preview Available !

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
IO Sink Current....................................................................20mA
Operating Temperature Range........................... -40NC to +85NC
Junction Temperature......................................................+150NC
Storage Temperature Range............................. -55NC to +125NC
Lead Temperature (soldering, 10s).................................+300NC
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 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
(TA = -40NC to +85NC, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
IO PIN: GENERAL DATA
1-Wire Pullup Voltage
1-Wire Pullup Resistance
Input Capacitance
Input Load Current
VPUP
RPUP
CIO
IL
(Note 2)
VPUP = 1.8V Q5% (Note 3)
(Notes 4, 5)
IO pin at VPUP
High-to-Low Switching Threshold VTL (Notes 6, 7)
Input Low Voltage
VIL (Notes 2, 8)
Low-to-High Switching Threshold VTH (Notes 6, 9)
Switching Hysteresis
VHY (Notes 6, 10)
Output Low Voltage
VOL IOL = 4mA (Note 11)
Recovery Time
tREC
RPUP = 750I (Notes 2, 12)
Time Slot Duration
tSLOT (Notes 2, 13)
IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE
Reset Low Time
Reset High Time
Presence-Detect Sample Time
IO PIN: 1-Wire WRITE
tRSTL
tRSTH
tMSP
(Note 2)
(Note 14)
(Notes 2, 15)
Write-Zero Low Time
Write-One Low Time
IO PIN: 1-Wire READ
tW0L
tW1L
(Notes 2, 16)
(Notes 2, 16)
Read Low Time
Read Sample Time
EEPROM
tRL
tMSR
(Notes 2, 17)
(Notes 2, 17)
Programming Current
Programming Time for a 32-Bit
Segment or Page Protection
IPROG
tPRD
VPUP = 1.89V (Notes 5, 18)
(Note 19)
Programming Time for the Secret tPRS Refer to the full data sheet.
Maxim Integrated
MIN TYP MAX UNITS
1.71
300
5
13
1500
5
0.65 x
VPUP
0.75 x
VPUP
0.3
1.89
750
19.5
0.3
0.4
V
I
pF
FA
V
V
V
V
V
Fs
Fs
48 80 Fs
48 Fs
8 10 Fs
8 16 Fs
1 2 Fs
1
tRL + d
2-d
2
1
10
Fs
Fs
mA
ms
ms
  2


Part Number DS28EL15
Description DeepCover Secure Authenticator
Maker Maxim Integrated
Total Page 6 Pages
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