DS1925 datasheet(45/46 Pages) MAXIM

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Table 30. Start the New Mission Communication

#Denotes a RoHS-compliant device that can include lead(Pb)

that is exempt under the RoHS requirements.

DS1925

iButton High-Capacity Temperature Logger

with 122KB Data-Log Memory

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Ordering Information

Package Information

For the latest package outline information and land patterns

(footprints), go to

www.maximintegrated.com/packages. Note

that a “+”, “#”, or “-” in the package code indicates RoHS status

only. Package drawings may show a different suffix character, but

the drawing pertains to the package regardless of RoHS status.

PART

TEMP RANGE

PIN-PACKAGE

DS1925L-F5#

-40°C to +85°C

iButton F5 Can

PACKAGE

TYPE

PACKAGE

CODE

OUTLINE

NO.

LAND

PATTERN NO.

iButton F5 Can

IB#6CB

21-0266

—

MASTER MODE

DATA (LSB FIRST)

COMMENTS

(Reset)

Reset pulse

(Presence)

Presence pulse

CCh

Issue “Skip ROM” command

66h

Issue “XPC Command” command

09h

Issue length byte

DDh

Issue “XPC Start Mission” subcommand

<8 FFh bytes>

Send dummy password

<2 byte CRC16)

Read CRC of preceding bytes

FFh

Send release byte

—

Delay to perform XPC Start Mission (tLSTD)

FFh

Send dummy byte

(Repeat Byte)

Read repeat byte to indicate success

(Reset)

Reset pulse

(Presence)

Presence pulse

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