Serial Number i
Button
Revision History
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
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 i
Button
Features and i
Button Can Physical Specification 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
specification.
Changed t
W1LMAX
from 1s to 1s.
2
10/08
Added the epsilon timing to the Write-Zero Time Slot in Figure 7. 8
DS1990A
10
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical
Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
©
2008 Maxim Integrated
The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc.

DS1990A-F3+

Mfr. #:
Manufacturer:
Maxim Integrated
Description:
Security ICs / Authentication ICs Serial Number iButton
Lifecycle:
New from this manufacturer.
Delivery:
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