DS28E22P MAXIM [Maxim Integrated Products], DS28E22P Datasheet

DS28E22P

Manufacturer Part Number

DS28E22P

Description

1-Wire SHA-256 Secure Authenticator with 2Kb User EEPROM

Manufacturer

MAXIM [Maxim Integrated Products]

Datasheet

1.DS28E22P.pdf (6 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

H&T Electronics

Part Number:

DS28E22P+

Quantity:

3 000

Current page: 1 of 6
Download datasheet (800Kb)

The DS28E22 combines crypto-strong, bidirectional,

secure challenge-and-response authentication func-

tionality with an implementation based on the FIPS

180-3-specified Secure Hash Algorithm (SHA-256). A

2Kb user-programmable EEPROM array provides non-

volatile storage of application data and additional pro-

tected memory holds a read-protected secret for SHA-

256 operations and settings for user memory control.

Each device has its own guaranteed unique 64-bit

ROM identification number (ROM ID) that is factory pro-

grammed into the chip. This unique ROM ID is used as

a fundamental input parameter for cryptographic opera-

tions and also serves as an electronic serial number

within the application. A bidirectional security model

enables two-way authentication between a host system

and slave-embedded DS28E22. Slave-to-host authenti-

cation is used by a host system to securely validate that

an attached or embedded DS28E22 is authentic. Host-

to-slave authentication is used to protect DS28E22 user

memory from being modified by a nonauthentic host. The

SHA-256 message authentication code (MAC), which the

DS28E22 generates, is computed from data in the user

memory, an on-chip secret, a host random challenge,

and the 64-bit ROM ID. The DS28E22 communicates

over the single-contact 1-Wire

The communication follows the 1-Wire protocol with the

ROM ID acting as node address in the case of a multiple-

device 1-Wire network.

Ordering Information

1-Wire is a registered trademark of Maxim Integrated Products, Inc.

For related parts and recommended products to use with this part, refer to:

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

Authentication of Network-Attached Appliances

Printer Cartridge ID/Authentication

Reference Design License Management

System Intellectual Property Protection

Sensor/Accessory Authentication and Calibration

Secure Feature Setting for Configurable Systems

Key Generation and Exchange for Cryptographic

Systems

appears at end of data sheet.

General Description

1-Wire SHA-256 Secure Authenticator

bus at overdrive speed.

Applications

ABRIDGED DATA SHEET

www.maximintegrated.com/DS28E22.related

S Symmetric Key-Based Bidirectional Secure

S Dedicated Hardware-Accelerated SHA Engine for

S Strong Authentication with a High Bit Count, User-

S 2048 Bits of User EEPROM Partitioned Into 8

S User-Programmable and Irreversible EEPROM

S Unique, Factory-Programmed 64-Bit Identification

S Single-Contact 1-Wire Interface Communicates

S Operating Range: 3.3V ±10%, -40NC to +85NC

S Low-Power 5µA (typ) Standby

S ±8kV Human Body Model ESD Protection (typ)

S 6-Pin TDFN, 6-Lead TSOC Packages

3.3V

with 2Kb User EEPROM

Authentication Model Based on SHA-256

Generating SHA-256 MACs

Programmable Secret, and Input Challenge

Pages of 256 Bits

Protection Modes Including Authentication, Write

and Read Protect, and OTP/EPROM Emulation

Number

with Host at Up to 76.9kbps

µC

C PORT)

Typical Application Circuit

SDA

SCL

SLPZ

EVALUATION KIT AVAILABLE

DS2465

1-Wire LINE

MAXIMUM I

= 1.1kΩ

DS28E22

219-0020; Rev 0; 9/12

C BUS CAPACITANCE 320pF

Features

Related parts for DS28E22P

DS28E22P Summary of contents

Page 1

SHA-256 Secure Authenticator General Description The DS28E22 combines crypto-strong, bidirectional, secure challenge-and-response authentication func- tionality with an implementation based on the FIPS 180-3-specified Secure Hash Algorithm (SHA-256). A 2Kb user-programmable EEPROM array provides non- volatile storage of application data ...

Page 2

ABRIDGED DATA SHEET 1-Wire SHA-256 Secure Authenticator ABSOLUTE MAXIMUM RATINGS IO Voltage Range to GND ...................................... -0.5V to 4.0V IO Sink Current ...................................................................20mA Operating Temperature Range ......................... -40NC to +85NC Junction Temperature .....................................................+150NC Stresses beyond those listed under “Absolute Maximum ...

Page 3

ABRIDGED DATA SHEET 1-Wire SHA-256 Secure Authenticator ELECTRICAL CHARACTERISTICS (continued -40NC to +85NC, unless otherwise noted.) (Note 1) A PARAMETER SYMBOL SHA-256 ENGINE Computation Current I CSHA Computation Time t CSHA Note 1: Limits are 100% production tested ...

Page 4

ABRIDGED DATA SHEET 1-Wire SHA-256 Secure Authenticator TOP VIEW + GND 1 DS28E22 IO 2 N.C. 3 TSOC PIN NAME TSOC TDFN- GND Ground Reference 1-Wire Bus Interface. Open-drain signal that requires an external pullup ...

Page 5

... Request Full Data Sheet. Ordering Information PART TEMP RANGE PIN-PACKAGE DS28E22P+* -40°C to +85°C 6 TSOC DS28E22P+T* -40°C to +85°C 6 TSOC (4k pcs) DS28E22Q+T -40°C to +85°C 6 TDFN-EP** (2.5k pcs) +Denotes a lead(Pb)-free/RoHS-compliant package Tape and reel. *Future product—contact factory for availability. ...

Page 6

ABRIDGED DATA SHEET 1-Wire SHA-256 Secure Authenticator REVISION REVISION NUMBER DATE 0 9/12 Initial release Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim ...

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