Datasheet

REVISION
DATE
DESCRIPTION
PAGES
CHANGED
033005
Redid the formatting based on newer template style. Also deleted the 0F Read ROM command
and added a note about presence pulse criteria.
1–8
10/08
Created newer template-style data sheet. All
Updated Ordering Information with lead-free part numbers. 1
Deleted Meets UL 913 (4th Edit); Intrinsically Safe Apparatus: Approved Under Entity Concept
for Use in Class I, Division I, Group A, B, C, and D from the Common iButton Features and
iButton Can Physical Specication sections.
1, 3
Updated Electrical Characteristics table:
Deleted Output High Voltage parameter.
Moved 1-Wire Pullup voltage parameter from table header to table body.
Changed V
ILMAX
from 0.8V to 0.3V.
Added Note 14 to the t
W0L
specication.
Changed t
W1LMAX
from 15µs – ε to 15µs.
2
Added the epsilon timing to the Write-Zero Time Slot in Figure 7. 8
11/21 Added the DS1990AA part number and related changes 1–6
DS1990A Serial Number iButton
Revision History
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