The DS9034PCX PowerCap is designed to be a lithium power source for nonvolatile timekeeping RAMs in Dallas Semiconductor's directly surface-mountable PowerCap Module (PCM) package. After a PowerCap module board has been soldered in place and cleaned, the DS9034PCX PowerCap is placed on top of the PCM board to form a complete PowerCap module package. The PowerCap is keyed to prevent incorrect attachment. The DS9034PCX can be easily removed by inserting a regular screwdriver into a detachment feature and prying gently outward and upward to release the PowerCap from the PowerCap module board. * Provides 10 Years of Battery Backup Power for Nonvolatile Timekeeping RAMs in the PowerCap Module Package (PCM) * Snaps Directly Onto Surface-Mounted PowerCap Module Boards * Detachment Feature Allows Easy Removal * Compatible with these 34-Pin PowerCap Module Boards: * DS1386P * DS1486P * DS1643P * DS1644P * DS1646P * DS1647P * DS1743P/WP * DS1251YP/WP * DS1248YP/WP * DS1244YP/WP * DS1553P/YP/WP * DS1554P/YP/WP * DS1556P/YP/WP * DS1557P/YP/WP * DS1744P/YP/WP * DS1746P/YP/WP * DS1747P/YP/WP