DS1687-5IND Datasheet PDF - Maxim Integrated

●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