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Status
Part Number	Status
DS1990R	Active: In Production.
DS1990R-F3	Active: In Production. But some versions of the family are No Longer Available. See Ordering Information.
DS1990R-F5	Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 124kB) Download   E-Mail

Description

The DS1990R Serial Number iButton® is a rugged data carrier that serves as an electronic registration number for automatic identification. Data is transferred serially through the 1-Wire® protocol, which requires only a single data lead and a ground return. Every DS1990R is factory lasered with a guaranteed unique 64-bit registration number that allows for absolute traceability. The durable stainless-steel iButton package is highly resistant to environmental hazards such as dirt, moisture, and shock. Its compact coin-shaped profile is self-aligning with mating receptacles, allowing the DS1990R to be used easily by human operators. Accessories permit the DS1990R iButton to be mounted on almost any object, including containers, pallets, and bags. The DS1990R is a fully compatible variant of the DS1990A. In applications where a presence pulse on contact is critical the DS1990R should be preferred over the DS1990A.

Key Features		Applications/Uses
Unique Factory-Lasered 64-Bit Registration Number Assures Error-Free Device Selection and Absolute Traceability Because No Two Parts are Alike Built-In Multidrop Controller for 1-Wire Net Digital Identification by Momentary Contact Data can be Accessed While Affixed to Object Economically Communicates to Bus Master with a Single Digital Signal at 16.3kbps Button Shape is Self-Aligning with Cup-Shaped Probes Durable Stainless-Steel Case Engraved with Registration Number Withstands Harsh Environments Easily Affixed with Self-Stick Adhesive Backing, Latched by its Flange, or Locked with a Ring Pressed Onto its Rim Presence Detector Acknowledges when Reader First Applies Voltage		Access Control Inventory Control Tool Management Work-in-Progress Tracking

Diagram

Application Notes

Application Note 74: Reading and Writing 1-Wire® Devices Through Serial Interfaces - DS1990R Application Note 155: 1-Wire® Software Resource Guide Device Description - DS1990R Application Note 3808: What Is an iButton? - DS1990R

Reliability Reports

Request Reliability Report for: DS1990R DS1990R-F3 DS1990R-F5

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: 1-4 of 4

DS1990R-F3	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1990R-F3		N/A	No Longer Available	DS1990R-F3#	Land Pattern: Not Available	-40°C to +85°C	See data sheet
DS1990R-F3+		N/A	No Longer Available		Land Pattern: Not Available	-40°C to +85°C	See data sheet
DS1990R-F3#			Active		CAN-F3;2 pin;301 mm² Outline Drawing: 21-0252 (PDF) Land Pattern: Not Available Use pkgcode/variation: IB#3NB*	-40°C to +85°C	RoHS/Lead-Free: RoHS Qualified Materials Analysis
DS1990R-F5	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1990R-F5#			Active		CAN-F5;2 pin;301 mm² Outline Drawing: 21-0266 (PDF) Land Pattern: Not Available Use pkgcode/variation: IB#5NB*	-40°C to +85°C	RoHS/Lead-Free: RoHS Qualified Materials Analysis

Related Products

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Technical Documents

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Description   Key Features   Applications/Uses   Key Specifications   Diagram

Data Sheet   Application Notes   Design Guides   Engineering Journals   Reliability Reports   Software/Models   Evaluation Kits

Price and Availability   Samples   Buy Online   Package Information   Lead-Free Information

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