DS28E01-100 Datasheet, PDF (1/21 Pages) Dallas Semiconductor – 1K-Bit Protected 1-Wire EEPROM with SHA-1 Engine

Rev 7; 3/12
ABRIDGED DATA SHEET
1Kb Protected 1-Wire EEPROM
with SHA-1 Engine
General Description
The DS28E01-100 combines 1024 bits of EEPROM with
challenge-and-response authentication security imple-
mented with the ISO/IEC 10118-3 Secure Hash
Algorithm (SHA-1). The 1024-bit EEPROM array is con-
figured as four pages of 256 bits with a 64-bit scratch-
pad to perform write operations. All memory pages can
be write protected, and one page can be put in
EPROM-emulation mode, where bits can only be
changed from a 1 to a 0 state. Each DS28E01-100 has
its own guaranteed unique 64-bit ROM registration num-
ber that is factory lasered into the chip. The DS28E01-
100 communicates over the single-contact 1-Wire^® bus.
The communication follows the standard 1-Wire protocol
with the registration number acting as the node address
in the case of a multidevice 1-Wire network.
Applications
Printer Cartridge Configuration and Monitoring
Medical Sensor Authentication and Calibration
System Intellectual Property Protection
Typical Operating Circuit
V_CC
µC
R_PUP
IO
DS28E01-100
GND
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 15.3kbps or 125kbps Using 1-Wire
Protocol
o Switchpoint Hysteresis and Filtering to Optimize
Performance in the Presence of Noise
o Reads and Writes Over 2.8V to 5.25V Voltage
Range from -40°C to +85°C
o 6-Lead TSOC and TDFN or 2-Lead TO-92 and SFN
Packages
Ordering Information
PART
DS28E01-100+
DS28E01P-100+
DS28E01P-100+T
DS28E01G-100+T&R
DS28E01Q-100+T&R
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
2 TO-92
6 TSOC
6 TSOC
2 SFN
6 TDFN-EP*
(2.5k pcs)
+Denotes a lead(Pb)-free/RoHS-compliant package.
T and T&R = Tape and reel.
*EP = Exposed pad.
Pin Configurations appear at end of data sheet.
Note to readers: This document is an abridged version of the full data sheet. To request the full data sheet, go to
www.maxim-ic.com/DS28E01 and click on Request Full Data Sheet.
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.