DS12C887 RTC Clock / Calendar Parallel 24-EDIP

Chính hãng MAXIM Description The DS12C887 real-time clocks (RTCs) are designed to be direct replacements for the DS1287. The devices provide a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a common interrupt output, a programmable square wave, and 113 bytes of battery-backed static RAM. The DS12C887 adds a century byte at address 32h. For all devices, the date at the end of the month is automatically adjusted for months with fewer than 31 days, including correction for leap years. The devices also operate in either 24-hour or 12-hour format with an AM/PM indicator. A precision temperature-compensated circuit monitors the status of VCC. If a primary power failure is detected, the device automatically switches to a backup supply. The device is accessed through a multiplexed byte-wide interface, which supports both Intel and Motorola modes. Key Features Drop-In Replacement for IBM AT Computer Clock/Calendar RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Through 2099 Binary or BCD Time Representation 12-Hour or 24-Hour Clock with AM and PM in 12-Hour Mode Daylight Saving Time Option Selectable Intel or Motorola Bus Timing Interfaced with Software as 128 RAM Locations 14 Bytes of Clock and Control Registers 113 Bytes of General-Purpose, Battery-Backed RAM RAM Clear Function Interrupt Output with Three Independently Maskable Interrupt Flags Time-of-Day Alarm Once Per Second to Once Per Day Periodic Rates from 122µs to 500ms End-of-Clock Update Cycle Flag Programmable Square-Wave Output Automatic Power-Fail Detect and Switch Circuitry Optional Industrial Temperature Range Available Specifications Category Integrated Circuits (ICs) Family Clock/Timing - Real Time Clocks Type Clock/Calendar Features Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output Memory Size 113 Bytes Time Format HH:MM:SS (12/24 hr) Date Format YY-MM-DD-dd Interface Parallel Voltage - Supply 4.5 V ~ 5.5 V Voltage - Supply, Battery 2.5 V ~ 4 V Operating Temperature 0°C ~ 70°C Mounting Type Through Hole Package / Case 24-DIP Module (0.600", 15.24mm) Supplier Device Package 24-EDIP Packaging Tube Standard Package 14 Applications/Uses Embedded Systems Network Hubs, Bridges, and Routers Security Systems Utility Meters