DS17487-5+

实时时钟 Real-Time Clocks

* Incorporates Industry-Standard DS12887 PC Clock Plus Enhanced Functions * RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Through 2099 * Optional +3.0V or +5.0V Operation * SMI Recovery Stack * 64-Bit Silicon Serial Number * Power-Control Circuitry Supports System Power-On from Date/Time Alarm or Key Closure * Crystal Select Bit Allows Operation with 6pF or 12.5pF Crystal * 12-Hour or 24-Hour Clock with AM and PM in 12-Hour Mode * 114 Bytes of General-Purpose, Battery-Backed NV SRAM * Extended Battery-Backed NV SRAM * 2048 Bytes DS17285/DS17287 * 4096 Bytes DS17485/DS17487 * 8192 Bytes DS17885/DS17887 * RAM Clear Function * Interrupt Output with Six Independently Maskable Interrupt Flags * Time-of-Day Alarm Once per Second to Once per Day * End of Clock Update Cycle Flag * Programmable Square-Wave Output * Automatic Power-Fail Detect and Switch Circuitry * Available in PDIP, SO, or TSOP Package DS17285, DS17485, DS17885 * Optional Encapsulated DIP EDIP Package with Integrated Crystal and Battery DS17287, DS17487, DS17887 * Optional Industrial Temperature Range Available