Datasheet
DS2465
DeepCover Secure Authenticator with
SHA-256 Coprocessor and 1-Wire Master Function
ABRIDGED DATA SHEET
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 I
2
C 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.
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 I
2
C Operating (Pullup) Voltage: 3.3V ±10%
S ±8kV ESD Protection on IO to GND (JESD22-A114
HBM, Typical)
S Operating Range: 3.3V ±10%, -40NC to +85NC
S 6-Pin TSOC Package
Applications
Authentication of Consumables
Secure Feature Control
Typical Application Circuit
219-0017; Rev 3; 9/13
Ordering Information appears at end of data sheet.
DeepCover and 1-Wire are registered trademarks of Maxim Integrated Products, Inc.
SDA
V
CC
SCL
SLPZ IO
R
P
R
P
= 1.1kΩ
MAXIMUM I
2
C BUS CAPACITANCE 320pF
3V
1-Wire LINE
µC
(I
2
C PORT)
DS2465
DS28E15
#1
DS28E15
#2
DS28E15
#n
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.