
DS1254
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PACKAGE INFORMATION (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package
Recommended Land Pattern (with Overlaid Package Outline)
The DS1254 BGA is a subset of the industry-standard 40mm BGA format, with all balls on a 50-mil grid. Corner
balls have been removed to provide space for the electrical and mechanical interface features that facilitate
attachment of the DS3800 battery cap.
0.150
0.250
0.500
NOTE
NOTE:
GROUND SHIELD TO ISOLATE RTC XTAL FROM EMI.