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REV: 071207

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

DS28E01-100

1K-Bit Protected 1-Wire EEPROM with

SHA-1 Engine

Abridged Data Sheet

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

µC

IO

DS28E01

GND

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

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

PIN CONFIGURATION

TSOC 150 mil

Top view

6 NC

5 NC

4 NC

GND 1

IO 2

NC 3

www.maxim-ic.com

Commands, Registers, and Modes are capitalized for

clarity.

1-Wire is a registered trademark of Dallas Semiconductor Corp.