●General Description
●The DS17285, DS17485, DS17885, DS17287, DS17487, and DS17887 real-time clocks (RTCs) are designed to be
●successors to the industry-standard DS12885 and DS12887. The DS17285, DS17485, and DS17885 (here after referred to as the DS17x85) provide a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a common interrupt output, a programmable square wave, and 114 bytes of battery-backed NV SRAM.
●Features
●♦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 NVSRAM
●♦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
●♦Underwriters Laboratory (UL) Recognized
●Applications
●Embedded Systems
●Utility Meters
●Security Systems
●Network Hubs, Bridges, and Routers
Part 3D Model
