Abridged Data Sheet
DS28E01-100
1K-Bit Protected 1-Wire EEPROM with
SHA-1 Engine
www.maxim-ic.com
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.
FEATURES
1024 bits of EEPROM memory partitioned into
four pages of 256 bits
On-chip 512-bit SHA-1 engine to compute 160-bit
Message Authentication Codes (MAC) and to
generate secrets
Write access requires knowledge of the secret
and the capability of computing and transmitting
a 160-bit MAC as authorization
User-programmable page write-protection for
page 0, page 3 or all four pages together
User-programmable OTP EPROM emulation
mode for page 1 ("write to 0")
Communicates to host with a single digital signal
at 15.3k bits or 125k bits per second using
1-Wire protocol
Switchpoint Hysteresis and Filtering to Optimize
Performance in the Presence of Noise
Reads and writes over a wide voltage range of
2.8V to 5.25V from -40°C to +85°C
6-lead TSOC, 2-lead SFN or solder-bumped
chipscale surface mount package
APPLICATIONS
Printer Cartridge Configuration and Monitoring
Medical Sensor Authentication and Calibration
System Intellectual Property Protection
ORDERING INFORMATION
PART
DS28E01P-100
DS28E01P-100/T&R
DS28E01P-100+
DS28E01P-100+T&R
TEMP RANGE PIN-PACKAGE
6-pin TSOC
-40°C to 85
°
C
-40°C to 85
°
C TSOC Tape & reel
6-pin TSOC
-40°C to 85
°
C
-40°C to 85
°
C TSOC Tape & reel
2-pin SFN Tape &
DS28E01G-100+T&R -40°C to 85
°
C
reel
TYPICAL OPERATING CIRCUIT
V
CC
R
PUP
µC
IO
+ Indicates lead-free compliance.
Ordering Information and Pin Configuration continued
at the end of the data sheet.
GND
DS28E01
Request full data sheet at:
www.maxim-ic.com/fullds/DS28E01-100
PIN CONFIGURATION
Commands, Registers, and Modes are capitalized for
clarity.
1-Wire is a registered trademark of Dallas Semiconductor Corp.
GND 1
IO 2
NC 3
6 NC
5 NC
4 NC
TSOC 150 mil
Top view
Note:
Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here:
www.maxim-ic.com/errata.
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REV: 071207
DALLAS [ DALLAS SEMICONDUCTOR ]
