DS1972-F3+【PDF 1/23 页】IBUTTON EEPROM 1KBit F3

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19-4888; Rev 4; 1/12

1024-Bit EEPROM iButton

General Description

The DS1972 is a 1024-bit, 1-Wire ? EEPROM chip orga-

nized as four memory pages of 256 bits each in a

rugged iButton ? package. 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 DS1972 communicates over the

single-conductor 1-Wire bus. The communication fol-

lows the standard 1-Wire protocol. Each device has its

own unalterable and unique 64-bit ROM registration

number that is factory lasered into the device. The reg-

istration number is used to address the device in a mul-

tidrop, 1-Wire net environment.

Applications

Access Control/Parking Meter

Work-in-Progress Tracking

Tool Management

Inventory Control

Maintenance/Inspection Data Storage

Examples of Accessories

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

from 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

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

PART

DS9096P

DS9101

DS9093RA

DS9093A

DS9092

F3 SIZE

3.10mm

ACCESSORY

Self-Stick Adhesive Pad

Multipurpose Clip

Mounting Lock Ring

Snap-In Fob

iButton Probe

Pin Configurations

F5 SIZE

5.89mm

? Chip-Based Data Carrier Stores Digital

Identification and Information, Armored in a

Durable Stainless-Steel Case

? Data Can Be Accessed While Affixed to Object

? Button Shape is Self-Aligning with Cup-Shaped

Probes

? 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

0.51mm

BRANDING

Ordering Information

t o n ? . c

? 2D

16.25mm

PART

DS1972-F5+

DS1972-F3+

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

F5 iButton

F3 iButton

ZZ D S197

0000006234FB

1-Wire ?

GND

1-Wire and iButton are registered trademarks of Maxim

Integrated Products, Inc.

17.35mm

+Denotes a lead(Pb)-free/RoHS-compliant package.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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