DS2704

PRODUCTION

1280-Bit EEPROM with SHA-1 Authentication

SHA-1 Authentication with 1280 Bits of EEPROM and Backwards-Compatible with the DS2502

Data Sheet (Rev. 3) Product Selection Table

Part Models: 2
1ku List Price: price unavailable

Viewing:

Overview

Secure Challenge and Response Authentication Using the SHA-1 Algorithm
Five Lockable 32-Byte Pages of EEPROM
Dallas 1-Wire Interface with Standard and Overdrive Communications Speeds
Unique 64-Bit Serial Number
Compatible with DS2502 Memory Map and Read Function Command
Operates with V_DD as Low as 2.5V
Tiny Chip-Scale UCSP and 3mm x 3mm TDFN Packaging (Pb-Free)

The DS2704 provides 1280 bits of EEPROM data storage and a Secure Hash Algorithm (SHA) engine. The Dallas 1-Wire® interface enables serial communication on a single battery contact and the 64-bit unique serial number allows multidrop networking and identification of individual devices.

The 1280-bit memory is organized as 5 pages of 32 bytes each and supports storage of battery cell characteristics, charging voltage, current, and temperature parameters, as well as battery pack manufacturing data. The EEPROM pages are in circuit rewritable and can be individually locked to write protect data.

The DS2704 employs the Secure Hash Algorithm (SHA-1) specified in the Federal Information publication 180-1 and 180-2, and ISO/IEC 10118-3. SHA-1 provides a robust cryptographic solution to ensure battery packs or other peripherals have been manufactured by authorized sources. The DS2704 processes a host transmitted challenge and the 64- bit secret key stored on chip to produce a 160-bit response for transmission back to the host. The secret key is never transmitted between the battery and the host.

Applications

2.5G/3G Wireless Handsets
Digital Still and Video Cameras
Handheld or Notebook Computers and Terminals
PDAs

Part Models: 2
1ku List Price: price unavailable

Documentation

Data Sheet 1

DS2704: 1280-Bit EEPROM with SHA-1 Authentication Data Sheet (Rev.3) 05/09/2007

Reliability Data 1

DS2704 Reliability Data 01/12/2023

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
DS2704G+	Thin Dual Flatpack No Leads, Exposed Pad	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
DS2704G+T&R	Thin Dual Flatpack No Leads, Exposed Pad	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 2, 2025 - 2505 PIN/ERRATA
		pcn_2505
DS2704G+	PRODUCTION	pcn_2505
Jun 20, 2016 - 1612 ASSEMBLY
		pcn_1612
DS2704G+	PRODUCTION
DS2704G+T&R	PRODUCTION

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

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Tools & Simulations

Software Development 1

DS2704K Evaluation Kit Software, 1.0.0

Evaluation Kits

Evaluation Kit for the DS2704

Buy Now View Details

Features and Benefits

Demonstrates the capabilities of the DS2704 1280 bit EEPROM with SHA-1 Authentication Device, including:
- Secure Challenge and Response Authentication using the SHA-1 Algorithm
- 5 Lockable 32 Byte Pages of EEPROM with DS2502 Compatibility
- Identification
Interfaces to the USB Port of a PC running Windows XP® or older operating system that supports USB operation

Product Details

The DS2704 evaluation kit (EV kit) makes performance evaluation, software development, and prototyping with the DS2704 1280 bit EEPROM with SHA-1 Authentication easy. The evaluation board interfaces to a PC through a DS9123O USB Adapter and RJ-11 cable connection. All related data sheets along with the evaluation software can be found on our website at www.maximintegrated.com.

The DS2704 EV kit evaluation software gives the user complete control of all SHA-1 and Memory functions of the DS2704 as well as the various other commands.

The evaluation board circuit is designed to provide the DS2704 with a stable environment to perform SHA-1 Calculations and program and read the DS2704. Kit demonstration boards will vary as they are improved upon over time. For information on the demonstration board circuits refer to our website at www.maximintegrated.com.