Datasheet > DS28E25P+

DS28E25P+

更新时间： 2024-11-19 12:44:55

品牌	Logo	应用领域
美信 - MAXIM		可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数	文件大小	规格书
6页	759K
描述
1-Wire SHA-256 Secure Authenticator with 4Kb User EEPROM

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DS28E25P+ 数据手册

ABRIDGED DATA SHEET

219-0019; Rev 0; 7/12

E V A L U A T I O N K I T A V A I L A B L E

DS28E25

1-Wire SHA-256 Secure Authenticator

with 4Kb User EEPROM

General Description

Features

The DS28E25 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

4Kb 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 DS28E25. Slave-to-host authenti-

cation is used by a host system to securely validate that

an attached or embedded DS28E25 is authentic. Host-

to-slave authentication is used to protect DS28E25 user

memory from being modified by a nonauthentic host. The

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

DS28E25 generates, is computed from data in the user

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

and the 64-bit ROM ID. The DS28E25 communicates

S Symmetric Key-Based Bidirectional Secure

Authentication Model Based on SHA-256

S Dedicated Hardware-Accelerated SHA Engine for

Generating SHA-256 MACs

S Strong Authentication with a High Bit Count, User-

Programmable Secret, and Input Challenge

S 4096 Bits of User EEPROM Partitioned Into 16

Pages of 256 Bits

S User-Programmable and Irreversible EEPROM

Protection Modes Including Authentication, Write

and Read Protect, and OTP/EPROM Emulation

S Unique, Factory-Programmed 64-Bit Identification

Number

S Single-Contact 1-Wire Interface Communicates

with Host at Up to 76.9kbps

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

S Low-Power 5µA (typ) Standby

8kV Human Body Model ESD Protection (typ)

S 2-Pin SFN, 6-Pin TDFN, 6-Lead TSOC Packages

Typical Application Circuit

over the single-contact 1-Wire bus at overdrive speed.

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.

PUP

Applications

Authentication of Network-Attached Appliances

Printer Cartridge ID/Authentication

µC

DS28E25

Reference Design License Management

System Intellectual Property Protection

GND

Sensor/Accessory Authentication and Calibration

Secure Feature Setting for Configurable Systems

Key Generation and Exchange for Cryptographic

Systems

Ordering Information appears at end of data sheet.

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

For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/DS28E25.related

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.

12 3 4 5 6

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与DS28E25P+相关器件

型号	品牌	获取价格	描述	数据表
DS28E25P+T	MAXIM	获取价格	1-Wire SHA-256 Secure Authenticator with 4Kb User EEPROM
DS28E25Q+T	MAXIM	获取价格	1-Wire SHA-256 Secure Authenticator with 4Kb User EEPROM
DS28E30	ADI	获取价格	1-Wire ECDSA Secure Authenticator
DS28E35	MAXIM	获取价格	DeepCover Secure Authenticator with 1-Wire ECDSA and 1Kb User EEPROM
DS28E35	ADI	获取价格	DeepCover 1-Wire ECDSA认证器，带有1Kb用户EEPROM
DS28E35_V01	MAXIM	获取价格	DeepCover Secure Authenticator with 1-Wire ECDSA and 1Kb User EEPROM
DS28E35P+	MAXIM	获取价格	EEPROM, 1KX1, Serial, CMOS, PDSO6, ROHS COMPLIANT, TSOC-6
DS28E35P+T	MAXIM	获取价格	EEPROM, 1KX1, Serial, CMOS, PDSO6, ROHS COMPLIANT, TSOC-6
DS28E35Q+T	MAXIM	获取价格	EEPROM, 1KX1, Serial, CMOS, PDSO8, 2 X 3 MM, ROHS COMPLIANT, TDFN-8
DS28E35Q+U	MAXIM	获取价格	EEPROM,

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