GENERAL DESCRIPTION
●The DS1501/DS1511 are full-function, year 2000-compliant real-time clock/calendars (RTCs) with an RTC alarm, watchdog timer, power-on reset, battery monitors, 256 bytes NV SRAM, and a 32.768kHz output. User access to all registers within the DS1501/DS1511 is accomplished with a byte-wide interface, as shown in Figure 8. The RTC registers contain century, year, month, date, day, hours, minutes, and seconds data in 24-hour binary-coded decimal (BCD) format. Corrections for day of month and leap year are made automatically.
●FEATURES
●BCD-Coded Century, Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap-Year Compensation Valid Up to the Year 2100
●Programmable Watchdog Timer and RTC Alarm
●Century Register; Y2K-Compliant RTC
●+3.3 or +5V Operation
●Precision Power-On Reset
●Power-Control Circuitry Support System Power
● On from Date/Day/Time Alarm or Key
● Closure/Modem-Detect Signal
●256 Bytes Battery-Backed NV SRAM
●Auxiliary Battery Input
●Accuracy of DS1511 Better than ±1
● Minute/Month at +25°C
●Day-of-Week/Date Alarm Register
●Crystal Select Bit Allow RTC to Operate with 6pF or 12.6pF Crystal
●Battery Voltage-Level Indicator Flags
●Available as Chip (DS1501) or Stand-Alone Module with Embedded Battery and Crystal(DS1511)
●UL Recognized
●APPLICATIONS
●Remote Systems
●Battery-Backed Systems
●Telecom Switches
●Office Equipment
●Consumer Electronics
