DS2465_13 Datasheet, PDF (1/30 Pages) Maxim Integrated Products – DeepCover Secure Authenticator with SHA-256 Coprocessor and 1-Wire Master Function

ABRIDGED DATA SHEET
DS2465
DeepCover Secure Authenticator with
SHA-256 Coprocessor and 1-Wire Master Function
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 (DS2465) is a
SHA-256 coprocessor with built-in 1-Wire^® master that
provides the SHA-256 and memory functionality required
by a host system to communicate with and operate a
1-Wire SHA-256 slave. In addition, it performs protocol
conversion between the I²C master and any attached
1-Wire SHA-256 slaves. For 1-Wire line driving, internal
user-adjustable timers relieve the system host processor
from generating time-critical 1-Wire waveforms, support-
ing both standard and overdrive 1-Wire communication
speeds. The 1-Wire line can be powered down under
software control. Strong pullup features support 1-Wire
power delivery to 1-Wire devices such as EEPROMs.
When not in use, the DS2465 can be put in sleep mode
where power consumption is minimal.
Ordering Information appears at end of data sheet.
Features
S SHA-256 Engine to Operate a Symmetric-Key-
Based Bidirectional Secure Authentication Model
S Two 32-Byte Pages of User EEPROM with Multiple
Programmable Protection Options
S 1-Wire Master Port with Selectable Active or
Passive 1-Wire Pullup
S Strong 1-Wire Pullup Provided by an Internal Low-
Impedance Signal Path
S 1-Wire Port Can Be Powered Down Under
Software Control
S I²C Operating (Pullup) Voltage: 3.3V ±10%
S Operating Range: 3.3V ±10%, -40NC to +85NC
S 6-Pin TSOC Package
Applications
Authentication of Consumables
Secure Feature Control
Typical Application Circuit
3V
(I²C PORT)
µC
RP
VCC
SDA
SCL
DS2465
RP = 1.1kΩ
MAXIMUM I²C BUS CAPACITANCE 320pF
1-Wire LINE
SLPZ
IO
DS28E15
#1
DS28E15
#2
DS28E15
#n
DeepCover is a trademark and 1-Wire is a registered trademark of Maxim Integrated Products, Inc.
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.
219-0017; Rev 2; 1/13