Slave-to-Master

A read-data time slot begins like a write-one time slot.

window, when responding with a 0, the DS1990R starts

pulling the data line low; its internal timing generator

determines when this pulldown ends and the voltage

starts rising again. When responding with a 1, the

DS1990R does not hold the data line low at all, and the

δ (rise time) on one side and the inter-

nal timing generator of the DS1990R on the other side

should be as short as permissible and the master should

for the DS1990R to get ready for the next time slot.

Serial Number iButton

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9

Package Information

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.

PACKAGE TYPE

PACKAGE CODE

OUTLINE NO.

LAND PATTERN NO.

F3 iButton

IB#3NB

21-0252

—

F5 iButton

IB#5NB

21-0266

—