Maxim > Products > 1-Wire® Devices > DS2431
Maxim > Products > Automotive > DS2431

DS2431

1024-Bit 1-Wire EEPROM

1Kb Serial EEPROM Operates from Single-Contact 1-Wire Interface

Overview

Technical Documents

Ordering Info

Status

Part Number	Status
DS2431	Active: In Production. See Ordering Information for details.

Description

The DS2431 is a 1024-bit, 1-Wire® EEPROM chip organized as four memory pages of 256 bits each. Data is written to an 8-byte scratchpad, verified, and then copied to the EEPROM memory. As a special feature, the four memory pages can individually be write protected or put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state. The DS2431 communicates over the single-conductor 1-Wire bus. The communication follows the standard 1-Wire protocol. Each device has its own unalterable and unique 64-bit ROM registration number that is factory lasered into the chip. The registration number is used to address the device in a multidrop, 1-Wire net environment.

Data Sheet

Download	Rev 12	(PDF, 645.1kB)
E-Mail

An evaluation kit is available: DS9090K DS9120, DS9120P, DS9120Q

Key Features

1024 Bits of EEPROM Memory Partitioned into Four Pages of 256 Bits
Individual Memory Pages can be Permanently Write Protected or Put in EPROM-Emulation Mode ("Write to 0")
Switchpoint Hysteresis and Filtering to Optimize Performance in the Presence of Noise
IEC 1000-4-2 Level 4 ESD Protection (±8kV Contact, ±15kV Air, typical)
Reads and Writes Over a Wide Voltage Range of 2.8V to 5.25V from -40°C to +85°C
Communicates to Host with a Single Digital Signal at 15.4kbps or 125kbps Using 1-Wire Protocol
Also Available as Automotive Version Meeting AEC-Q100 Grade 1 Qualification Requirements (DS2431-A1; Refer to the IC Data Sheet for Details)

Applications/Uses

Accessory/PC Board Identification
After-Market Management of Consumables
Analog Sensor Calibration Including IEEEP 1451.4 Smart Sensors
Ink and Toner Print Cartridge Identification
Medical Sensor Calibration Data Storage

Key Specifications:

Memory (EPROM, EEPROM, ROM, NV SRAM)

Part Number

Memory Type

Memory Size

Bus Type

Real Time Clock

DIP w/Int. Batt.

Pwr. Cap Pckg.

Battery Monitor

GPIO

V_SUPPLY
(V)

Budgetary Price

min

max

See Notes

DS2431

EEPROM

1K x 1

1-Wire

2.8

5.25

$0.60 @1k

See All Memory (EPROM, EEPROM, ROM, NV SRAM) (58)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

Application Notes

Application Note 27		Understanding and Using Cyclic Redundancy Checks with Maxim iButton Products
Application Note 74		Reading and Writing 1-Wire® Devices Through Serial Interfaces
Application Note 114		1-Wire File Structure
Application Note 126		1-Wire® Communication Through Software
Tutorial 148		Guidelines for Reliable Long Line 1-Wire® Networks
Application Note 155		1-Wire® Software Resource Guide Device Description
Application Note 178		Printed Circuit Board Identification Using 1-Wire® Products
Application Note 187		1-Wire Search Algorithm
Application Note 192		Using the DS2480B Serial 1-Wire® Line Driver
Application Note 1097		White Paper 2: Using the 1-Wire® Public Domain Kit
Application Note 1100		White Paper 5: Using 1-Wire APIs for Data Sheet Commands
Application Note 2420		1-Wire® Communication with a Microchip PICmicro Microcontroller
Application Note 2965		1-Wire® Master Device Configuration
Application Note 2966		Minimal Remote 1-Wire® Master Protocol
Tutorial 3438		Serial Digital Data Networks
Application Note 3697		Transition Guide: Replacing the DS2430A with the DS2431
Application Note 3989		Add Control, Memory, Security, and Mixed-Signal Functions with a Single Contact
Application Note 4002		Understanding Flip-Chip and Chip-Scale Package Technologies and Their Applications
Application Note 4132		Attachment methods for the electro-mechanical SFN package
Application Note 4255		How to Power the Extended Features of 1-Wire® Devices
Reference Design 4477		Reference Design of a 1-Wire® Bidirectional Voltage-Level Translator for 1.8V to 5V
Application Note 4623		Smart Cable Aids Quality Control and Authentication
Tutorial 4671		Improve Sensor Performance and SNR in Pulse Oximeter Designs
Tutorial 4702		Easily Add Memory, Security, Monitoring, and Control to Medical Sensors and Consumables
Application Note 4717		Injection Molding an IC into a Connector or Consumable Item
Application Note 4931		IEEE 1451.4 Class 1 MMI Smart Transducer Digital Driver Circuit
Application Note 5042		Implementing Nonvolatile, Nonresettable Counters for Embedded Systems

Product Guides

1-Wire® Products (PDF)

Reliability Reports

Reliability Report:	DS2431.pdf
Show FIT data for:

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2431		N/A	No Longer Available	DS2431+	TO92;3 pin;19.5 mm² Outline Drawing:21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2431+			Active		TO92;3 pin;19.5 mm² Outline Drawing:21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2431+T&R			Active		TO92;3 pin;27.6 mm² Outline Drawing:21-0250 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2431/T&R		N/A	No Longer Available	DS2431+T&R	TO92;3 pin;27.6 mm² Outline Drawing:21-0250 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2431G+T&R			Active		QFN;2 pin;SFN; Outline Drawing:21-0390 (PDF) Land Pattern: AN4132 (PDF) Use pkgcode/variation: G266N+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2431G+U			Active		QFN;2 pin;SFN; Outline Drawing:21-0390 (PDF) Land Pattern: AN4132 (PDF) Use pkgcode/variation: G266N+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2431GA+T&R			Active		SFN;2 pin;SFN; Outline Drawing:21-0575 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: T23A6N+1*	-40°C to +85°C	See data sheet
DS2431GA+U			Active		SFN;2 pin;SFN; Outline Drawing:21-0575 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: T23A6N+1*	-40°C to +85°C	See data sheet
DS2431P		N/A	No Longer Available	DS2431P+	TSOC;6 pin;17.8 mm² Outline Drawing:21-0382 (PDF) Land Pattern: 90-0321 (PDF) Use pkgcode/variation: D6-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2431P+			Active		TSOC;6 pin;17.8 mm² Outline Drawing:21-0382 (PDF) Land Pattern: 90-0321 (PDF) Use pkgcode/variation: D6+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2431P+T&R			Active		TSOC;6 pin;17.8 mm² Outline Drawing:21-0382 (PDF) Land Pattern: 90-0321 (PDF) Use pkgcode/variation: D6+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2431P/T&R		N/A	No Longer Available	DS2431P+T&R	TSOC;6 pin;17.8 mm² Outline Drawing:21-0382 (PDF) Land Pattern: 90-0321 (PDF) Use pkgcode/variation: D6-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2431Q+T&R			Active		TDFN-EP;6 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0058 (PDF) Use pkgcode/variation: T633+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2431Q+U			Active		TDFN-EP;6 pin;9.6 mm² Outline Drawing:21-0137 (PDF) Land Pattern: 90-0058 (PDF) Use pkgcode/variation: T633+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2431X		N/A	No Longer Available	DS2431X-S+	UCSP(R);6 pin;3 mm² Outline Drawing:21-0377 (PDF) Land Pattern: Not Available Use pkgcode/variation: BR622-1*	-40°C to +85°C	See data sheet
DS2431X+		N/A	No Longer Available	DS2431X-S+	UCSP(R);6 pin;3 mm² Outline Drawing:21-0376 (PDF) Land Pattern: Not Available Use pkgcode/variation: BR622+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2431X+U			Active		UCSP(R);6 pin;3 mm² Outline Drawing:21-0376 (PDF) Land Pattern: Not Available Use pkgcode/variation: BR622+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2431X-S+			Active		UCSP(R);6 pin;3 mm² Outline Drawing:21-0376 (PDF) Land Pattern: Not Available Use pkgcode/variation: BR622+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

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Evaluation Kits

DS9090K	1-Wire Device Evaluation Kit Rev B4
DS9120, DS9120P, DS9120Q	Socket Boards for Evaluating 1-Wire Devices

Products with Similar Part Numbers

DS2431-A1

1024-Bit, 1-Wire EEPROM for Automotive Applications

More Information

New Product Press Release

[ 2004-05-11 ]

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-4675 Rev 12; 2012-02-03
This page last modified: 2012-02-03