DS28E15 MAXIM [Maxim Integrated Products], DS28E15 Datasheet

DS28E15

Manufacturer Part Number

DS28E15

Description

1-Wire SHA-256 Secure Authenticator with 512-Bit User EEPROM

Manufacturer

MAXIM [Maxim Integrated Products]

Datasheet

1.DS28E15.pdf (6 pages)

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Download datasheet (781Kb)

The DS28E15 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

512-bit user-programmable EEPROM array provides

nonvolatile storage of application data. Additional pro-

tected memory holds a read-protected secret for SHA-

256 operations and settings for memory protection

control. Each device has its own guaranteed unique

64-bit ROM identification number (ROM ID) that is fac-

tory programmed into the chip. This unique ROM ID is

used as a fundamental input parameter for cryptographic

operations and also serves as an electronic serial num-

ber within the application. A bidirectional security model

enables two-way authentication between a host system

and slave-embedded DS28E15. Slave-to-host authenti-

cation is used by a host system to securely validate that

an attached or embedded DS28E15 is authentic. Host-

to-slave authentication is used to protect DS28E15 user

memory from being modified by a nonauthentic host. The

DS28E15 communicates 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 multidevice 1-Wire network.

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.maxim-ic.com.

3.3V

µC

C PORT)

General Description

ABRIDGED DATA SHEET

1-Wire SHA-256 Secure Authenticator

MAXIMUM I

= 1.1kΩ

C BUS CAPACITANCE 320pF

SDA

SCL

SLPZ

DS2465

with 512-Bit User EEPROM

1-Wire LINE

www.maxim-ic.com/DS28E15.related

S Symmetric-Key-Based Bidirectional Secure

S Strong Authentication with a High-Bit-Count User-

S 512 Bits of User EEPROM Partitioned Into Two

S User-Programmable and Irreversible EEPROM

S Unique Factory-Programmed, 64-Bit Identification

S Single-Contact 1-Wire Interface

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

S ±8kV HBM ESD Protection (typ)

S 2-Pin SFN, 6-Pin TDFN-EP, and 6-Pin TSOC

Ordering Information

Authentication Model Based on SHA-256

Programmable Secret and Input Challenge

Pages of 256 Bits

Protection Modes Including Authentication, Write

and Read Protect, and OTP/EPROM Emulation

Number

Packages

DS28E15

Authentication of Consumables

Secure Feature Control

Typical Application Circuit

DS28E15

appears at end of data sheet.

DS28E15

Applications

219-0018; Rev 0; 6/12

Features

Related parts for DS28E15

DS28E15 Summary of contents

Page 1

... DS28E15. Slave-to-host authenti- cation is used by a host system to securely validate that an attached or embedded DS28E15 is authentic. Host- to-slave authentication is used to protect DS28E15 user memory from being modified by a nonauthentic host. The DS28E15 communicates 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 multidevice 1-Wire network ...

Page 2

... TL (Notes (Notes (Notes 6, 10 4mA (Note 11 1500I (Notes 2, 12) PUP (Notes 2, 13) (Note 2) (Note 14) (Notes 2, 15) (Notes 2, 16) (Notes 2, 16) (Notes 2, 17) (Notes 2, 17) DS28E15 Package. MIN TYP MAX UNITS 2.97 3.63 V 300 1500 I 1500 pF 5 19 PUP ...

Page 3

... Note 14: An additional reset or communication sequence cannot begin until the reset high time has expired. Note 15: Interval after t during which a bus master can read a logic there is a DS28E15 present. The power-up pres- RSTL ence detect pulse could be outside this interval but will be complete within 2ms after power-up. ...

Page 4

... Bus Interface. Open-drain signal that requires an external pullup resistor. Ground Reference Exposed Pad (TDFN Only). Solder evenly to the board’s ground plane for proper operation. Refer to Application Note 3273: Exposed Pads: A Brief Introduction for additional information. DS28E15 Pin Configurations BOTTOM VIEW GND 2 ...

Page 5

... DS28E15G+ -40NC to +85NC DS28E15G+T -40NC to +85NC DS28E15Q+T -40NC to +85NC DS28E15P+ -40NC to +85NC DS28E15P+T -40NC to +85NC +Denotes a lead(Pb)-free/RoHS-compliant package Tape and reel. *EP = Exposed pad. with 512-Bit User EEPROM For the latest package outline information and land patterns PIN-PACKAGE (footprints www.maxim-ic.com/packages. Note that a 2 SFN “ ...

Page 6

... Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated Products, Inc. 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 2012 Maxim Integrated Products © with 512-Bit User EEPROM Revision History DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc. DS28E15 PAGES CHANGED — 43 ...

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