DS1921H データシートの表示（PDF） - Maxim Integrated

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DS1921H

High-Resolution Thermochron iButton Range H: +15°C to +46°C; Z: -5°C to +26°C

Maxim Integrated 

www.maxim-ic.com

DS1921H/Z

High-Resolution Thermochron iButton

Range H: +15°C to +46°C; Z: -5°C to +26°C

SPECIAL FEATURES

ƒ Digital thermometer measures temperature in

1/8°C increments with ±1°C accuracy

ƒ Built-in real-time clock (RTC) and timer has

accuracy of ±2 minutes per month from 0°C

to 45°C

ƒ Water resistant or waterproof if placed inside

DS9107 iButton® capsule (Exceeds Water

Resistant 3 ATM requirements)

ƒ Automatically wakes up and measures

temperature at user-programmable intervals

from 1 to 255 minutes

ƒ Logs up to 2048 consecutive temperature

measurements in protected nonvolatile (NV)

random access memory

ƒ Records a long-term temperature histogram

with 1/2°C resolution

ƒ Programmable temperature-high and

temperature-low alarm trip points

ƒ Records up to 24 time stamps and durations

when temperature leaves the range specified

by the trip points

ƒ 512 bytes of general-purpose read/write NV

random access memory

ƒ Communicates to host with a single digital

signal at 15.4kbits or 125kbits per second

using 1-Wire® protocol

ƒ Fixed range: H: +15°C to +46°C;

Z: -5°C to +26°C

COMMON iButton FEATURES

ƒ Digital identification and information by

momentary contact

ƒ Unique, factory-lasered and tested 64-bit reg-

istration number (8-bit family code + 48-bit

serial number + 8-bit CRC tester) assures ab-

solute traceability because no two parts are

alike

ƒ Multidrop controller for 1-Wire net

ƒ Chip-based data carrier compactly stores

information

ƒ Data can be accessed while affixed to object

ƒ Button shape is self-aligning with cup-shaped

probes

ƒ Durable stainless steel case engraved with

registration number withstands harsh

environments

ƒ Easily affixed with self-stick adhesive

backing, latched by its flange, or locked with

a ring pressed onto its rim

ƒ Presence detector acknowledges when reader

first applies voltage

ƒ Designed to meet UL#913 (4th Edit.).

Intrinsically Safe Apparatus: under Entity

Concept for use in Class I, Division 1, Group

A, B, C, and D Locations, contact Dallas

Semiconductor for certification schedule

F5 MICROCAN

5.89

0.51

®

16.25

D6

® 21

3B2000FBC52B

1-Wire®

Thermochron®

17.35

IO

GND

All dimensions are shown in millimeters.

ORDERING INFORMATION

DS1921H-F5 +15°C to +46°C F5 iButton

DS1921Z-F5 -5°C to +26°C F5 iButton

EXAMPLES OF ACCESSORIES

DS9096P

Self-Stick Adhesive Pad

DS9101

Multi-Purpose Clip

DS9093RA Mounting Lock Ring

DS9093A

Snap-In Fob

DS9092

iButton Probe

1-Wire, Microcan, and iButton are registered trademarks of Dallas

Semiconductor Corp, a wholly owned subsidiary of Maxim

Integrated Products, Inc.

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