DS28E01-100 Datasheet, PDF (1/16 Pages) Dallas Semiconductor – 1K-Bit Protected 1-Wire EEPROM with SHA-1 Engine

Abridged Data Sheet
www.maxim-ic.com
DS28E01-100
1K-Bit Protected 1-Wire EEPROM with
SHA-1 Engine
GENERAL DESCRIPTION
The DS28E01-100 combines 1024 bits of EEPROM
with challenge-and-response authentication security
implemented with the ISO/IEC 10118-3 Secure Hash
Algorithm (SHA-1). The 1024-bit EEPROM array is
configured as four pages of 256 bits with a 64-bit
scratchpad to 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 number that is factory lasered into the
chip. The DS28E01-100 communicates over the
single-contact 1-Wire® bus. The communication
follows the standard Dallas Semiconductor 1-Wire
protocol with the registration number acting as node
address in the case of a multi-device 1-Wire network.
APPLICATIONS
Printer Cartridge Configuration and Monitoring
Medical Sensor Authentication and Calibration
System Intellectual Property Protection
TYPICAL OPERATING CIRCUIT
VCC
RPUP
µC
IO
DS28E01
GND
FEATURES
ƒ 1024 bits of EEPROM memory partitioned into
four pages of 256 bits
ƒ On-chip 512-bit SHA-1 engine to compute 160-bit
Message Authentication Codes (MAC) and to
generate secrets
ƒ Write access requires knowledge of the secret
and the capability of computing and transmitting
a 160-bit MAC as authorization
ƒ User-programmable page write-protection for
page 0, page 3 or all four pages together
ƒ User-programmable OTP EPROM emulation
mode for page 1 ("write to 0")
ƒ Communicates to host with a single digital signal
at 15.3k bits or 125k bits per second using
1-Wire protocol
ƒ Switchpoint Hysteresis and Filtering to Optimize
Performance in the Presence of Noise
ƒ Reads and writes over a wide voltage range of
2.8V to 5.25V from -40°C to +85°C
ƒ 6-lead TSOC, 2-lead SFN or solder-bumped
chipscale surface mount package
ORDERING INFORMATION
PART
TEMP RANGE PIN-PACKAGE
DS28E01P-100
-40°C to 85°C 6-pin TSOC
DS28E01P-100/T&R -40°C to 85°C TSOC Tape & reel
DS28E01P-100+
-40°C to 85°C 6-pin TSOC
DS28E01P-100+T&R -40°C to 85°C TSOC Tape & reel
DS28E01G-100+T&R
-40°C to 85°C
2-pin SFN Tape &
reel
+ Indicates lead-free compliance.
Ordering Information and Pin Configuration continued
at the end of the data sheet.
Request full data sheet at:
www.maxim-ic.com/fullds/DS28E01-100
Commands, Registers, and Modes are capitalized for
clarity.
1-Wire is a registered trademark of Dallas Semiconductor Corp.
PIN CONFIGURATION
GND 1
IO 2
NC 3
6 NC
5 NC
4 NC
TSOC 150 mil
Top view
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REV: 071207