DETAILED DESCRIPTION
●The DS1685/DS1687 are real-time clocks (RTC) designed as successors to the industry-standard DS1285, DS1385, DS1485, and DS1585 PC RTCs. These devices provide the industry-standard DS1285 clock function with either +3.0V or +5.0V operation. The DS1685 also incorporates a number of enhanced features including a silicon serial number, power-on/off control circuitry, 242 bytes of user NV SRAM, and 32.768kHz output for sustaining power management activities.
●FEATURES
●■ Incorporates Industry-Standard DS1287 PC Clock plus Enhanced Features Such as Y2K Compliant
●■ +3V or +5V Operation
●■ 64-Bit Silicon Serial Number
●■ Power-Control Circuitry Supports System Power-On from Date/Time Alarm or Key Closure
●■ 32kHz Output for Power Management
●■ Crystal-Select Bit Allows RTC to Operate with 6pF or 12.5pF Crystal
●■ SMI Recovery Stack
●■ 242 Bytes Battery-Backed NV RAM
●■ Auxiliary Battery Input
●■ RAM Clear Input
●■ Century Register
●■ Date Alarm Register
●■ Compatible with Existing BIOS for Original DS1287 Functions
●■ Available as Chip (DS1685) or Stand-Alone Encapsulated DIP (EDIP) with Embedded Battery and Crystal (DS1687)
●■ Timekeeping Algorithm Includes Leap-Year Compensation Valid Through 2099
●■ Underwriters Laboratory (UL) Recognized
●APPLICATIONS
● Embedded Systems
● Utility Meters
● Security Systems
● Network Hubs, Bridges, and Routers
