DS28EL25

DeepCover Secure Authenticator with 1-Wire SHA-256 and 4Kb User EEPROM

Protect Your Development Investment with Crypto-Strong Authentication and Advanced Physical Security

Data Sheet (Rev. 1)

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Part Details

Symmetric Key-Based Bidirectional Secure Authentication Model Based on SHA-256
Dedicated Hardware-Accelerated SHA Engine for Generating SHA-256 MACs
Strong Authentication with a High Bit Count, User-Programmable Secret, and Input Challenge
4096 Bits of User EEPROM Partitioned Into 16 Pages of 256 Bits
User-Programmable and Irreversible EEPROM Protection Modes Including Authentication, Write and Read Protect, and OTP/EPROM Emulation
Unique, Factory-Programmed 64-Bit Identification Number
Single-Contact 1-Wire Interface Communicates with Host at Up to 76.9kbps
Operating Range: 1.8V ±5%, -40°C to +85°C
Low-Power 5µA (typ) Standby
±8kV Human Body Model ESD Protection (typ)
6-Pin TDFN Package

Documentation

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Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA).

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This is the most up-to-date revision of the Data Sheet.

Evaluation Kits

Evaluation System for the DS28EL25 and DS24L65

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Features and Benefits

Complete EV System:
- Five DS28EL25 ICs in TDFN-EP Package
- One USB-to-I²C Module (DS9400#) Provides PC Connection
- DS2465 EV Board Provides 1-Wire Interface and SHA-256 Coprocessor
- One EV Board (DS9120Q+) with TDFN-EP Socket Provides Easy Chip Evaluation
USB-to-I²C Module Contains Prolific PL-2303HXD USB-to-UART Chip
- Enumerates as a Virtual PC COM Port
- Windows Certified Logo USB Device Driver Available
- Standard USB Cable Interface
I²C Host Interface Supports 400kHz I²C Communication Speeds
EV Board Contains Convenient On-Board Test Points
Evaluation Software Will Be Provided Along with Full Evaluation Kit Data Sheet

Product Details

The DS28EL25 evaluation system (EV system) provides the hardware and software necessary to evaluate and program the DS28EL25 DeepCover^® Secure Authenticator. EV system operation requires a host PC for user-friendly evaluation.

This evaluation system includes a DS9400 USB-to-I²C PC adapter, a DS2465 EV board, a DS9120Q+ evaluation socket board for a TDFN DS28EL25, and five DS28EL25 sample devices in a TDFN package. The EV software runs on Windows^® 8, Windows 7, Windows Vista^®, and Windows XP^® operating systems. Detailed instructions for downloading and installing software, as well as general EV system operation are included in the EV system data sheet; software and documentation are available at the link above.

Note: The DS2465 EV board and DS9400# subcomponents are not available for direct sale outside of evaluation systems. A data sheet specific to DS9400# is not available.

USB-to-1-Wire/iButton Adapter

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Features and Benefits

Driver Support for Windows^® 11 and Windows 10 Operating Systems
Enumerates as a Virtual PC COM Port by Use of the Prolific PL-2303GC USB-to-UART Bridge IC
Emulates the DS2480B 1-Wire Line Driving Functionality
1-Wire EEPROM Programming
1.8V Read/Write Operation to 1-Wire/iButton Devices
RJ11 Interface for Standard Connectivity Accessories such as the DS9120 Family of Socket Adapters
Supports Standard and Overdrive 1-Wire Communication
Provides Strong Pullup to 1.8V
Fully Compliant with USB 2.0 Specification

Product Details

The DS9481R-200 is a USB-to-1-Wire^® adapter for easy PC connectivity to 1-Wire devices. The adapter provides an RJ11 connector with the signals to communicate with all 1-Wire and iButton^® devices that support a 1.8V data I/O level. Additionally, the adapter provides the support and signaling to program 1-Wire/iButton EEPROM devices. To provide a total hardware solution, the DS9481R-200 can readily be used with the family of DS9120 socket adapters to create a 1-Wire PC programmer for 1-Wire peripheral devices (contact factory for more information). The equivalent peripheral hardware solution for the iButton is the DS1402D-DR8.

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