DS1904_11 데이터 시트보기 (PDF) - Maxim Integrated

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DS1904_11

RTC iButton

Maxim Integrated 

19-4864; Rev 4/11

DS1904

RTC iButton

SPECIAL FEATURES

 Real-Time Clock/calendar in binary format

 Uses the same binary time/date representation

as the DS1994 but with 1 second resolution

 Clock accuracy is better than ± 2 minutes per

month at 25°C

 Operating temperature range from -40°C to

+70°C

 Over 10 years of operation

COMMON iButton FEATURES

 Unique, factory-lasered and tested 64-bit

registration number (8-bit family code +

48-bit serial number + 8-bit CRC tester)

assures absolute traceability because no two

parts are alike

 Multidrop controller for MicroLAN

 Digital identification and information by

momentary contact

 Chip-based data carrier compactly stores in-

formation

 Data can be accessed while affixed to object

 Economically communicates to host with a

single digital signal at 16.3 kbps

 Standard 16 mm diameter and 1-Wire®

protocol ensure compatibility with iButton®

Device family

 Button shape is self-aligning with cup-shaped

probes

 Durable stainless steel case engraved with

registration number withstands harsh envi-

ronments

 Easily affixed with self-stick adhesive back-

ing, latched by its flange, or locked with a

ring pressed onto its rim

 Presence detector acknowledges when reader

first applies voltage

 Meets UL 913, 5th Ed., Rev. 1997-02-24;

Intrinsically Safe Apparatus, Approved under

Entity Concept for use in Class I, Division 1,

Group A, B, C, and D Locations

F5 MicroCan

5.89

0.51



16.25

40

 24

000000FBC52B

1-Wire

17.35

IO

GND

All dimensions are shown in millimeters

ORDERING INFORMATION

DS1904L-F5# F5 MicroCan

# Denotes an RoHS-compliant device that may include

lead(Pb) that is exempt under the RoHS requirements.

EXAMPLES OF ACCESSORIES

DS9096P

Self-Stick Adhesive Pad

DS9101

Multi-Purpose Clip

DS9093RA

Mounting Lock Ring

DS9093A

Snap-In Fob

DS9092

iButton Probe

iButton DESCRIPTION

The DS1904 RTC iButton is a rugged real-time clock module that can be accessed with minimal

hardware. Data is transferred serially via the 1-Wire protocol, which requires only a single data lead and a

ground return. The DS1904 contains a unique 64-bit factory-lasered ROM and a real-time clock/calendar

1-Wire and iButton are registered trademarks of Maxim Integrated Products, Inc.

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