DS28E10 Datasheet, PDF (1/17 Pages) Maxim Integrated Products – 1-Wire SHA-1 Authenticator

ABRIDGED DATA SHEET
Rev 0; 6/10
EVAALVUAAILTAIOBNLEKIT
1-Wire SHA-1 Authenticator
General Description
The DS28E10 combines secure challenge-and-response
authentication functionality based on the FIPS 180-3
specified Secure Hash Algorithm (SHA-1) with 224 bits
of one-time programmable user EPROM in a single
chip. Once written, the memory is automatically write
protected. Additionally, each device has its own guaran-
teed unique 64-bit ROM identification number (ROM ID)
that is factory programmed into the chip. Memory writes
are performed 4 bytes at a time. A secure and low-cost
factory programming service is available to preprogram
device data, including the SHA-1 security data compo-
nents. The device communicates over the single-contact
1-Wire® bus. The communication follows the standard
1-Wire protocol with the ROM ID acting as node address
in the case of a multidevice 1-Wire network.
Applications
Reference Design License Management
System Intellectual Property Protection
Sensor/Accessory Authentication and Calibration
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS28E10R+T
-40NC to +85NC
3 SOT23
DS28E10P+
-40NC to +85NC
6 TSOC
DS28E10P+T
-40NC to +85NC
6 TSOC
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Features
S Dedicated Hardware-Accelerated SHA-1 Engine
for Generating SHA-1 MACs
S One Page of 28 Bytes User OTP EPROM
S Irreversible Write Protection
S Unique, Factory-Programmed 64-Bit Identification
Number
S 1-Wire Interface for Standard and Overdrive Speed
S Communicates with Host at Up to 15.4kbps at
Standard Speed or Up to 125kbps in Overdrive Mode
S Operating Range from 2.8V to 3.6V, -40NC to +85NC
S 3-Lead SOT23, 6-Lead TSOC Package
S 8kV Human Body Model (HBM) ESD Protection
(typ) on 1-Wire and VCC Pin
Typical Operating Circuit
3.3V
VCC
µC
Px.1
RPUP
VCC
1-Wire _IO ^DS28E10
GND
GND
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products   1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.