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Data Sheet

FULL DATA SHEET (PDF, 268kB) Download   E-Mail

Description

The DS1973 4Kb EEPROM iButton is a rugged read/write data carrier that identifies and stores relevant information about the product or person to which it is attached. This information can be accessed with minimal hardware, for example a single port pin of a micro-controller. The DS1973 consists of a factory-lasered registration number that includes a unique 48-bit serial number, an 8-bit CRC, and an 8-bit Family Code (23H) plus 4096 bits of EEPROM. The power to program and read the DS1973 is derived entirely from the 1-Wire communication line. The memory is organized as sixteen pages of 256 bits each. The 64-bit registration number provides a guaranteed unique identity which allows for absolute traceability. Data is transferred serially via the 1-Wire protocol which requires only a single data lead and a ground return. The durable MicroCan package is highly resistant to harsh environments such as dirt, moisture, and shock. Its compact button-shaped profile is self-aligning with cup-shaped receptacles, allowing the DS1973 to be used easily by human operators or automatic equipment. Accessories permit the DS1973 to be mounted on printed circuit boards, plastic key fobs, photo-ID badges, ID bracelets, and many other objects. Applications include work-in-progress tracking, electronic travelers, access control and storage of calibration constants.

Key Features

4096 bits Electrically Erasable Programmable Read Only Memory (EEPROM) Overdrive mode boosts communication speed to 142 kbits per second 256-bit scratchpad ensures integrity of data transfer Memory partitioned into 256-bit pages for packetizing data Reduces control, address, data and power to a single data pin 8-bit family code specifies DS1973 communication requirements to reader Reads and writes over a wide voltage range of 2.8V to 6.0V from -40°C to +85°C

Key Specifications:   iButton Products
Part Number	Overview	Memory Type	Memory Size	UniqueWare	Real-Time Clock	Price**
DS1973	iButton Memory	EEPROM	4Kbits	No	No	$2.43 @ 1k
See All iButton Products (25)

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

Application Notes

Application Note 27: Understanding and Using Cyclic Redundancy Checks with Maxim iButton Products - DS1973 Application Note 114: 1-Wire File Structure - DS1973 Application Note 126: 1-Wire Communication Through Software - DS1973 Application Note 148: Guidelines for Reliable Long Line 1-Wire® Networks - DS1973 Application Note 155: 1-Wire® Software Resource Guide Device Description - DS1973 Application Note 159: Software Methods to Achieve Robust 1-Wire® Communication in iButton® Applications - DS1973 Application Note 177: Programming 1-Wire EPROM and EEPROM Memory Devices Using a PC - DS1973 Application Note 187: 1-Wire Search Algorithm - DS1973 Application Note 192: Using the DS2480B Serial 1-Wire Line Driver - DS1973 Application Note 244: Advanced 1-Wire Network Driver - DS1973 Application Note 1097: White Paper 2: Using the 1-Wire® Public Domain Kit - DS1973 Application Note 1100: White Paper 5: Using 1-Wire APIs for Data Sheet Commands - DS1973 Application Note 3808: What Is an iButton? - DS1973 Application Note 4255: How to Power the Extended Features of 1-Wire® Devices - DS1973

Evaluation Kits

none

Design Guides

1-Wire® Products (PDF)

Reliability Reports

Reliability Report: DS1973.pdf

Software/Models

none

Ordering Information
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. More: SeeFull Data Sheet or Part 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.
Devices: 1-8 of 8
DS1973	Notes	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1973-F5+W				0 pin; Use pkgcode/variation: IB+5NS*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1973-F3+				0 pin; Use pkgcode/variation: IB+3NS*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1973-F5+				0 pin; Use pkgcode/variation: IB+5NS*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1973-F3+W				0 pin; Use pkgcode/variation: IB+3NS*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1973-F3	F3 MicroCan			0 pin; Use pkgcode/variation: IB-3NB*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1973-F5	F5 MicroCan			0 pin; Use pkgcode/variation: IB-5NS*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1973-F3#				0 pin; Use pkgcode/variation: IB#3NB*	-40°C to +85°C	RoHS/Lead-Free: RoHS Qualified Materials Analysis
DS1973-F5#				0 pin; Use pkgcode/variation: IB#5NB*	-40°C to +85°C	RoHS/Lead-Free: RoHS Qualified Materials Analysis

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