DS12R885/DS12CR887/DS12R887
RTCs with Constant-Voltage Trickle Charger
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23
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Revision History
REVISION
NUMBER
REVISION
DATE
DESCRIPTION
PAGES
CHANGED
0 4/04 Initial release of DS12R885 —
1 4/04 Added DS12R887 and DS12CR887 to data sheet All
2 12/04 Initial release of DS12R887 All
3 4/06
Corrected Intel Bus Write Timing, Intel Bus Read Timing,
IRQ
Release Delay Timing,
Power-Up/Down Timing, and Functional Diagram diagrams; added the EDIP paragraph
to the Handling, PC Board Layout, and Assembly section.
5, 6, 7, 21
4 5/06 Changed pin 16 from N.C. to GND for the SO package. 10, 21
5 2/07
Updated 114 bytes bullet in the Features section; updated the Ordering Information;
corrected the Intel Bus Read Timing diagram; added a note about how the missing
V
BACKUP
pin on the DS12CR887 and DS12R887 is internally connected to a lithium
cell; added the Package Information table.
1, 6, 11, 22
6 4/10
Updated the storage temperature ranges, added the lead temperature, and updated the
soldering temperature for all packages in the Absolute Maximum Ratings; removed
the DS12R885 and DS12CR887 leaded parts from the Ordering Information table.
1, 2, 22
