Maxim > Products > iButton® Devices > DS1990A

DS1990A

Serial Number iButton

Overview

Technical Documents

Ordering Info

Status

Part Number	Status
DS1990A	Active: In Production. See Ordering Information for details.

Description

The DS1990A 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 DS1990A 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 DS1990A to be used easily by human operators. Accessories enable the DS1990A iButton to be mounted on almost any object, including containers, pallets, and bags.

Data Sheet

Download	Rev 3	(PDF, 160kB)
E-Mail

Key Features

Can Be Read in Less Than 5ms
Operating Range: 2.8V to 6.0V, -40°C to +85°C

Common iButton Features

Unique Factory-Lasered 64-Bit Registration Number Ensures 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

Applications/Uses

Access Control
Inventory Control
Tool Management
Work-in-Progress Tracking

Key Specifications:

iButton Products

Part Number

Applications

Memory Type

Memory Size

Unique Ware

Real Time Clock

Smallest Available Pckg.
(mm²)

Budgetary Price

max w/pins

See Notes

DS1990A

Electronic Access Control

Guard Tour

ROM Only

64 bits

301

$1.25 @1k

See All iButton Products (26)

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

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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

Rev 3; 2008-10-15
This page last modified: 2010-09-01