Maxim Integrated DS1687
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.
| Part No. |
DS1687 |
| Datasheet |
DS1687
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| Manufacturer |
 Maxim Integrated |
| Description |
3V/5V Real-Time Clocks |
| Buy |
Stock & Price
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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 PowerOn 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 PACKAGE DIMENSION INFORMATION PIN CONFIGURATIONS TOP VIEW PWR X1 X2 AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 GND 1 2 3 24 23 VCC X2 X1 PWR N.C.
