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DS28E02Q+T

Description
1-Wire SHA-1 Authenticated 1Kb EEPROM with 1.8V Operation
File Size181KB,21 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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DS28E02Q+T Overview

1-Wire SHA-1 Authenticated 1Kb EEPROM with 1.8V Operation

ABRIDGED DATA SHEET
219-0008; Rev 1; 3/12
1-Wire SHA-1 Authenticated 1Kb
EEPROM with 1.8V Operation
General Description
The DS28E02 combines 1024 bits of EEPROM with
challenge-and-response authentication security imple-
mented with the FIPS 180-3 Secure Hash Algorithm
(SHA-1). The 1024-bit EEPROM array is configured as
four pages of 256 bits with a 64-bit scratchpad to per-
form write operations. All memory pages can be write
protected, and one page can be put in EPROM-emula-
tion mode, where bits can only be changed from a 1 to
a 0 state. Each DS28E02 has its own guaranteed
unique 64-bit ROM registration number that is factory
installed into the chip. The DS28E02 communicates
over the single-contact 1-Wire
®
bus. The communica-
tion follows the standard 1-Wire protocol with the regis-
tration number acting as the node address in the case
of a multidevice 1-Wire network.
Features
o
1024 Bits of EEPROM Memory Partitioned Into
Four Pages of 256 Bits
o
On-Chip 512-Bit SHA-1 Engine to Compute 160-
Bit Message Authentication Codes (MACs) and to
Generate Secrets
o
Write Access Requires Knowledge of the Secret
and the Capability of Computing and Transmitting
a 160-Bit MAC as Authorization
o
User-Programmable Page Write Protection for
Page 0, Page 3, or All Four Pages Together
o
User-Programmable OTP EPROM Emulation Mode
for Page 1 (“Write to 0”)
o
Communicates to Host with a Single Digital
Signal at 12.5kbps or 35.7kbps Using 1-Wire
Protocol
o
Switchpoint Hysteresis and Filtering to Optimize
Communication Performance in the Presence of
Noise
o
Reads and Writes Over 1.75V to 3.65V Voltage
Range from -20°C to +85°C
o
6-Lead TSOC and TDFN Packages
DS28E02
Applications
Reference Design License Management
System Intellectual Property Protection
Sensor/Accessory Authentication and Calibration
Medical Consumable Authentication
Printer Cartridge Configuration and Monitoring
Typical Operating Circuit
PART
V
CC
R
PUP
IO
µC
DS28E02
Ordering Information
TEMP RANGE
-20°C to +85°C
-20°C to +85°C
-20°C to +85°C
PIN-PACKAGE
6 TSOC
6 TSOC
6 TDFN-EP*
(2.5k pcs)
DS28E02P+
DS28E02P+T&R
DS28E02Q+T&R
+Denotes
a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
*EP
= Exposed pad.
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.

DS28E02Q+T Related Products

DS28E02Q+T DS28E02_12 DS28E02 DS28E02P+ DS28E02P+R DS28E02P+T DS28E02P+TR DS28E02Q+R DS28E02Q+TR
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