RTCs with Constant-Voltage Trickle Charger
5C/DS12R87
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
1
2
4/04
Initial release of DS12R885
—
All
All
4/04
Added DS12R887 and DS12CR887 to data sheet
Initial release of DS12R887
12/04
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.
3
4
4/06
5/06
5, 6, 7, 21
10, 21
Changed pin 16 from N.C. to GND for the SO package.
Updated 114 bytes bullet in the Features section; updated the Ordering Information;
corrected the Intel Bus Write Timing diagram; added a note about how the missing
5
6
2/07
4/10
1, 6, 11, 22
2, 22
V
pin on the DS12CR887 and DS12R887 is internally connected to a lithium
BACKUP
cell; added the Package Information table.
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.
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